Kindle Direct Publishing Royalty Calculator

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Kindle Direct Publishing Royalty Calculator

Estimate your KDP book royalties accurately by inputting your book details.

Enter your book's title for reference.
The price customers will pay. Minimum $0.99 for eBook.
35% Royalty 70% Royalty Choose between 35% or 70% royalty for eBooks.
Number of pages for physical books.
Number of color pages for physical books. Set to 0 for black & white.
Estimated cost Amazon charges for eBook delivery. Varies by region and file size.
Estimate based on pages, color, and binding. See KDP calculator for details.
USD EUR GBP CAD AUD Select the currency for your list price.

Your Royalty Estimates

Est. Royalty Per Unit:
Royalty Option Selected
Your Share of List Price
Amazon Fees/Costs
Print Cost Per Unit
Estimated eBook Delivery Cost
Formula Used:

For eBooks: Royalty = (List Price * Royalty Rate) – Delivery Costs
For Print Books (Expanded Distribution not included): Royalty = List Price – Printing Costs Per Unit – Amazon Fee (for standard distribution) *(Note: Amazon's fee for standard print distribution is often implicitly covered by the royalty calculation, this calculator focuses on direct costs.)*

Royalty Breakdown by Price Point

eBook Royalty | Print Royalty (Est.)
Estimated royalties based on varying list prices.

Royalty Comparison Table

Detailed royalty breakdown across different price points and book types.
List Price Royalty Option Est. eBook Royalty Est. Print Royalty eBook Delivery Cost Print Cost Per Unit

What is a Kindle Direct Publishing (KDP) Royalty Calculator?

A Kindle Direct Publishing (KDP) royalty calculator is an essential online tool designed for authors and publishers using Amazon's KDP platform. It helps you estimate the earnings you can expect from selling your books, both eBooks and print books. By inputting key details such as your book's list price, page count, royalty option, and specific costs, the calculator provides a clear projection of your per-unit profit. This allows for informed pricing strategies, financial planning, and a better understanding of your publishing business's profitability. Authors use this tool to answer the fundamental question: "How much money will I actually make per sale?"

Who Should Use It: Any author or publisher utilizing Amazon KDP for distributing their books. This includes self-published authors, independent publishers, and even traditionally published authors venturing into direct sales. It's particularly useful for those experimenting with different price points, publishing formats (eBook vs. paperback/hardcover), or exploring different royalty structures offered by KDP.

Common Misconceptions: A frequent misconception is that authors receive the full list price minus Amazon's cut. In reality, the calculation is more nuanced. For eBooks, there's the list price, the chosen royalty rate (35% or 70%), and delivery costs which vary by file size. For print books, the primary deduction is the printing cost, which depends heavily on page count, color usage, and binding type. Another misconception is that the 70% eBook royalty applies everywhere; it has specific territory and price requirements. Our Kindle Direct Publishing royalty calculator aims to clarify these details.

Kindle Direct Publishing (KDP) Royalty Calculator Formula and Mathematical Explanation

Understanding the formulas behind your KDP royalties is crucial for accurate financial forecasting. Amazon KDP offers different royalty structures for eBooks and print books, each with its own set of calculations.

eBook Royalty Calculation

For eBooks, Amazon KDP primarily offers two royalty options: 35% and 70%. The applicable royalty rate depends on the book's list price and the marketplace. For the 70% option, the list price must fall within a specific range (e.g., $2.99 to $9.99 in many marketplaces) and Amazon deducts a delivery fee based on file size.

Formula for 70% Royalty Option:

Est. eBook Royalty = (List Price * 0.70) - Delivery Costs

Formula for 35% Royalty Option:

Est. eBook Royalty = List Price * 0.35

Note: The 35% option does not have a separate delivery cost deduction. The 70% royalty option is generally more profitable for books priced within its eligible range due to the higher base percentage, even after delivery costs.

Print Book Royalty Calculation (Standard Distribution)

For print books (paperback and hardcover), the royalty is calculated based on the list price minus the printing costs. Amazon's fee for standard distribution is generally factored into the net amount available after printing costs.

Formula for Print Books:

Est. Print Royalty = List Price - Printing Costs Per Unit

Note: This formula is a simplification. Amazon might have additional fees or different distribution channels (like Expanded Distribution) with varying terms. The "Printing Costs Per Unit" are variable and depend on factors like page count, ink type (black & white vs. color), paper type, and binding.

Variable Explanations

Variables Used in KDP Royalty Calculations
Variable Meaning Unit Typical Range
List Price The price set by the author for the book. Currency (e.g., USD, EUR) $0.99 – $200.00 (eBook); $1.00 – $1000.00 (Print)
Royalty Rate The percentage of the list price the author earns. Percentage (%) 35% or 70% (eBook)
Delivery Costs Amazon's fee for delivering the eBook file to the customer. Currency (e.g., USD, EUR) Varies ($0.0001 – $0.20 per MB, approx.)
Page Count Total number of pages in the print book. Number (pages) 1 – 800 (approx., varies by trim size & binding)
Color Pages Number of pages that contain color ink. Number (pages) 0 – Page Count
Printing Costs Per Unit The cost to manufacture one physical copy of the book. Currency (e.g., USD, EUR) Varies based on page count, color, paper, binding. ($0.80 – $30.00+)
Est. eBook Royalty Estimated net earnings per eBook sale. Currency (e.g., USD, EUR) Variable
Est. Print Royalty Estimated net earnings per print book sale. Currency (e.g., USD, EUR) Variable

Practical Examples (Real-World Use Cases)

Let's illustrate the Kindle Direct Publishing royalty calculator with two practical examples:

Example 1: eBook Pricing Strategy

An author is publishing a new fantasy novel and is deciding on the list price for the eBook. The book is 300 pages long and has a standard file size, resulting in an estimated delivery cost of $0.002 per download. They plan to use the 70% royalty option.

  • Scenario A: List Price $4.99
    • Royalty Option: 70%
    • Delivery Costs: $0.002
    • Calculation: ($4.99 * 0.70) – $0.002 = $3.493 – $0.002 = $3.49
    • Result: Estimated eBook Royalty = $3.49 per unit.
  • Scenario B: List Price $9.99
    • Royalty Option: 70%
    • Delivery Costs: $0.002
    • Calculation: ($9.99 * 0.70) – $0.002 = $6.993 – $0.002 = $6.99
    • Result: Estimated eBook Royalty = $6.99 per unit.

Interpretation: By increasing the price from $4.99 to $9.99, the author nearly doubles their royalty per unit, demonstrating the significant impact of pricing on profitability. The Kindle Direct Publishing royalty calculator helps visualize this trade-off.

Example 2: Print Book Profitability

A non-fiction author has a 200-page book with no color pages. They estimate the printing costs (using standard paper and binding) to be $3.15 per unit. They are considering two list prices for the paperback version.

  • Scenario A: List Price $12.99
    • Printing Costs Per Unit: $3.15
    • Calculation: $12.99 – $3.15 = $9.84
    • Result: Estimated Print Royalty = $9.84 per unit.
  • Scenario B: List Price $15.99
    • Printing Costs Per Unit: $3.15
    • Calculation: $15.99 – $3.15 = $12.84
    • Result: Estimated Print Royalty = $12.84 per unit.

Interpretation: This shows how print book royalties are directly tied to the list price after covering the fixed printing cost. The author needs to balance perceived customer value with their desired profit margin. Using a tool like the Kindle Direct Publishing royalty calculator is key for setting competitive yet profitable prices.

How to Use This Kindle Direct Publishing Royalty Calculator

Using this calculator is straightforward. Follow these simple steps to get your royalty estimates:

  1. Enter Book Title (Optional): Type your book's title into the "Book Title" field. This is just for your reference within the calculator's context.
  2. Set List Price: Input the price you intend to sell your book for in the "List Price" field. Ensure it meets Amazon's minimum requirements (e.g., $0.99 for eBooks).
  3. Choose Royalty Option (eBooks): Select either "35% Royalty" or "70% Royalty" from the dropdown. Remember that the 70% option has specific price and territory requirements and incurs delivery costs.
  4. Input Page Count (Print): For physical books, enter the total number of pages.
  5. Specify Color Pages (Print): Enter the number of pages that contain color ink. If your book is entirely black and white, enter 0.
  6. Estimate Delivery Costs (eBooks): Input the estimated cost Amazon charges for delivering your eBook. This varies based on file size and marketplace; check KDP documentation for accurate estimates.
  7. Enter Printing Costs Per Unit (Print): Input the estimated cost to print one copy of your physical book. This depends on page count, color usage, paper type, and binding. Use Amazon's own print cost calculator for precise figures.
  8. Select Currency: Choose the currency corresponding to your list price.
  9. Click Calculate: Press the "Calculate Royalties" button.

How to Read Results:

  • Est. Royalty Per Unit (Primary Result): This is your main takeaway – the estimated profit you'll make on each individual sale. It's highlighted for easy visibility.
  • Royalty Option Selected: Confirms which royalty structure you chose.
  • Your Share of List Price: Shows the percentage of the list price that you are essentially earning after Amazon's deductions.
  • Amazon Fees/Costs: Summarizes the deductions made by Amazon (e.g., delivery costs for eBooks).
  • Print Cost Per Unit: Displays the estimated manufacturing cost for a physical book.
  • Estimated eBook Delivery Cost: Shows the calculated delivery cost for eBooks based on your input.
  • Table & Chart: These provide a more detailed look at how your royalties might vary across different price points and book types.

Decision-Making Guidance: Use the results to compare different pricing strategies. For eBooks, see if the higher royalty rate at a higher price point justifies potential lower sales volume compared to a lower price. For print books, ensure your list price comfortably covers printing costs and provides your desired profit margin. If the estimated royalty is too low, consider adjusting your list price, optimizing your page count, or reducing color usage in your print book.

Key Factors That Affect Kindle Direct Publishing Royalty Results

Several critical factors influence the royalties you earn through Kindle Direct Publishing. Understanding these can help you optimize your pricing and publishing strategy:

  1. List Price: This is the most direct factor. A higher list price generally leads to higher gross earnings per sale, but it can also impact sales volume. For eBooks, the list price also determines eligibility for the 70% royalty option.
  2. Royalty Option (eBooks): The choice between 35% and 70% significantly impacts your earnings. The 70% option requires the list price to be within a specific range (e.g., $2.99-$9.99) and incurs delivery costs based on file size, while the 35% option has no such restrictions but yields a smaller share of the list price.
  3. Printing Costs (Print Books): This is a primary cost deduction for physical books. It's influenced by:
    • Page Count: More pages mean more paper and ink, increasing costs.
    • Color vs. Black & White: Color printing is substantially more expensive than black and white.
    • Paper Type & Binding: Different paper stocks and binding options (paperback, hardcover) affect the base cost.
  4. Delivery Costs (eBooks): For the 70% royalty option, Amazon charges a fee to deliver the eBook file. This cost is variable and depends on the file size of your eBook, which is influenced by factors like images, formatting complexity, and font embedding. Larger files mean higher delivery costs, reducing your net royalty.
  5. Marketplace and Currency: Amazon operates in multiple marketplaces (e.g., US, UK, DE, FR, JP). List prices and royalty calculations can vary slightly due to regional pricing considerations, currency exchange rates, and local taxes (like VAT). Always check the specific marketplace settings.
  6. Distribution Channels: KDP offers standard distribution for print books (primarily to Amazon.com) and an optional Expanded Distribution service (to other retailers, libraries, and bookstores). Expanded Distribution often has different terms, potentially lower list prices, and may incur additional fees or printing costs, affecting your net royalty.
  7. Promotional Activities and Discounts: While not directly part of the core royalty calculation, participation in KDP Select promotions (like Kindle Unlimited page reads or Kindle Countdown Deals) can influence overall earnings by driving volume, even if per-unit royalties are temporarily adjusted.

Frequently Asked Questions (FAQ)

What is the minimum list price for an eBook on KDP?
The minimum list price for eBooks on KDP is generally $0.99 USD (or equivalent in other currencies). However, to be eligible for the 70% royalty option, the list price must typically fall between $2.99 and $9.99 in most marketplaces.
How are print book printing costs calculated?
Printing costs for print books are primarily determined by page count, whether the pages are black & white or color, the paper type, and the binding (paperback or hardcover). Amazon provides a detailed printing cost estimate within your KDP dashboard when you set up your print book. You can use our Kindle Direct Publishing royalty calculator to estimate profitability once you know these costs.
Does the 70% royalty option apply to all marketplaces?
The 70% royalty option is available in many major marketplaces (like the US, UK, Canada, Australia, Germany, France, etc.), but it has specific list price requirements for each marketplace. The 35% option is available globally. Always verify the specific terms for each marketplace in your KDP account.
What are eBook delivery costs?
Delivery costs are fees charged by Amazon for transmitting your eBook file to a customer's device. These costs apply only when you choose the 70% royalty option. The fee is calculated based on the file size of your eBook (in MB) multiplied by a rate specific to the customer's marketplace.
How does Amazon's fee work for print books?
For print books sold through standard distribution, your royalty is calculated as the list price minus the printing costs. Amazon's fee is essentially covered within this structure; you receive the net amount after the manufacturing cost is deducted from the sale price. Expanded Distribution may have different fee structures.
Can I change my list price after publishing?
Yes, you can change your list price for both eBooks and print books at any time through your KDP dashboard. Changes usually take effect within 24-72 hours. This flexibility allows you to adjust your pricing based on market response or promotional strategies, and re-calculate with our Kindle Direct Publishing royalty calculator.
What is KDP Select?
KDP Select is an optional 90-day exclusivity program for eBooks. Enrolled eBooks are made available on Kindle Unlimited (KU), where authors earn royalties based on pages read (a different model than direct sales). Enrolling in KDP Select also allows participation in promotions like Kindle Countdown Deals. If enrolled, you cannot sell your eBook on other platforms during the exclusivity period.
How often does Amazon pay royalties?
Amazon typically pays royalties monthly, around 60 days after the end of the month in which the sales occurred. For example, January sales are typically paid around March 30th. You must meet a minimum payment threshold (which varies by currency) to receive a payout.
Should I use the 35% or 70% royalty option for my eBook?
This depends on your pricing strategy and target audience. The 70% option is generally more profitable if you can price your book between $2.99 and $9.99 (in most markets) and your file size results in manageable delivery costs. If you plan to price your book below $2.99 or significantly above $9.99, or if your eBook file is very large, the 35% option might be more suitable or the only option available. Always use a Kindle Direct Publishing royalty calculator to compare potential earnings.

Related Tools and Internal Resources

// Function to validate input fields function validateInput(id, min, max, isFloat = true) { var input = document.getElementById(id); var errorDiv = document.getElementById(id + 'Error'); var value = input.value.trim(); errorDiv.textContent = "; // Clear previous error if (value === ") { errorDiv.textContent = 'This field cannot be empty.'; return false; } var numValue; if (isFloat) { numValue = parseFloat(value); if (isNaN(numValue)) { errorDiv.textContent = 'Please enter a valid number.'; return false; } if (numValue < 0) { errorDiv.textContent = 'Cannot be negative.'; return false; } // Specific validation for list price minimum if (id === 'listPrice' && numValue < 0.99) { errorDiv.textContent = 'List price must be at least $0.99.'; return false; } // Specific validation for pages if (id === 'pages' && numValue < 1) { errorDiv.textContent = 'Page count must be at least 1.'; return false; } } else { numValue = parseInt(value); if (isNaN(numValue)) { errorDiv.textContent = 'Please enter a whole number.'; return false; } if (numValue < 0) { errorDiv.textContent = 'Cannot be negative.'; return false; } } if (min !== undefined && numValue max) { errorDiv.textContent = 'Value must be no more than ' + max + '.'; return false; } return numValue; } // Function to update input errors function updateErrors() { var valid = true; var listPrice = validateInput('listPrice', 0.99); var pages = validateInput('pages', 1); var colorPages = validateInput('colorPages', 0); var deliveryCosts = validateInput('deliveryCosts', 0); var printingCostsPerUnit = validateInput('printingCostsPerUnit', 0); if (listPrice === false || pages === false || colorPages === false || deliveryCosts === false || printingCostsPerUnit === false) { valid = false; } // Further validation for color pages not exceeding total pages if (colorPages !== false && listPrice !== false) { // Check if other validations passed if (colorPages > pages) { document.getElementById('colorPagesError').textContent = 'Color pages cannot exceed total pages.'; valid = false; } } return valid; } // Function to calculate royalties function calculateRoyalties() { if (!updateErrors()) { return; // Stop if there are validation errors } var listPrice = parseFloat(document.getElementById('listPrice').value); var royaltyOption = parseInt(document.getElementById('royaltyOption').value); var pages = parseInt(document.getElementById('pages').value); var colorPages = parseInt(document.getElementById('colorPages').value); var deliveryCostsPerMB = parseFloat(document.getElementById('deliveryCosts').value); // This is per MB, actual cost depends on file size. Simplified here. var printingCostsPerUnit = parseFloat(document.getElementById('printingCostsPerUnit').value); var currency = document.getElementById('currency').value; var estEbookRoyalty = 0; var estPrintRoyalty = 0; var ebookDeliveryCostActual = 0; // Simplified: assume a fixed delivery cost per book for demonstration // Simplified Delivery Cost Assumption: Assume average file size leads to a typical delivery cost // In reality, this depends heavily on actual file size (images, formatting). // For calculation, let's assume a base delivery cost or use the per MB rate if a file size is provided. // Since file size isn't an input, we'll use a proxy or a fixed value. Let's use a fixed value for simplicity in this example, informed by the per MB rate. // A common range might be $0.01 to $0.15. Let's use $0.05 as an example placeholder if deliveryCostsPerMB is provided and seems reasonable. var averageEbookFileSizeBytes = 1024 * 1024 * 2; // Assume 2MB average file size var estimatedDeliveryCost = (deliveryCostsPerMB * averageEbookFileSizeBytes) / (1024 * 1024); // Calculate cost for assumed file size // Ensure delivery cost calculation does not result in NaN or negative values if (isNaN(estimatedDeliveryCost) || estimatedDeliveryCost estEbookRoyalty && listPrice > 3.00) { // Heuristic: Show print if it's higher and price suggests print is relevant primaryResultValue = estPrintRoyalty.toFixed(2); primaryResultLabel = "Est. Print Royalty Per Unit"; } document.getElementById('primaryResultValue').textContent = formatCurrency(parseFloat(primaryResultValue)); document.getElementById('primaryResultLabel').textContent = primaryResultLabel; // Update Intermediate Results document.getElementById('selectedRoyaltyOption').textContent = royaltyOption + "% Royalty" + (royaltyOption === 70 ? " (70% Option)" : " (35% Option)"); document.getElementById('yourShare').textContent = royaltyOption + "%"; // For eBook, this is the base rate before delivery costs document.getElementById('feesCosts').textContent = formatCurrency(estimatedDeliveryCost); // Primarily eBook delivery cost document.getElementById('printCostPerUnitResult').textContent = formatCurrency(printingCostsPerUnit); document.getElementById('ebookDeliveryCostResult').textContent = formatCurrency(estimatedDeliveryCost); // Update Table updateTable(formatCurrency); // Update Chart updateChart(estEbookRoyalty, estPrintRoyalty, formatCurrency); } // Function to update the results table function updateTable(formatCurrency) { var tableBody = document.getElementById('royaltyTableBody'); tableBody.innerHTML = "; // Clear existing rows var listPrice = parseFloat(document.getElementById('listPrice').value); var royaltyOption = parseInt(document.getElementById('royaltyOption').value); var pages = parseInt(document.getElementById('pages').value); var colorPages = parseInt(document.getElementById('colorPages').value); var deliveryCostsPerMB = parseFloat(document.getElementById('deliveryCosts').value); var printingCostsPerUnit = parseFloat(document.getElementById('printingCostsPerUnit').value); var currency = document.getElementById('currency').value; var averageEbookFileSizeBytes = 1024 * 1024 * 2; // 2MB var estimatedDeliveryCost = (deliveryCostsPerMB * averageEbookFileSizeBytes) / (1024 * 1024); if (isNaN(estimatedDeliveryCost) || estimatedDeliveryCost < 0) { estimatedDeliveryCost = 0.05; } var pricePoints = [1.99, 2.99, 4.99, 7.99, 9.99, 12.99, 15.99]; for (var i = 0; i < pricePoints.length; i++) { var currentPrice = pricePoints[i]; var currentEbookRoyalty = 0; var currentPrintRoyalty = 0; // eBook Royalty if (royaltyOption === 70) { currentEbookRoyalty = (currentPrice * 0.70) – estimatedDeliveryCost; } else { currentEbookRoyalty = currentPrice * 0.35; } currentEbookRoyalty = Math.max(0, currentEbookRoyalty); // Print Royalty (using the user's input printing cost for consistency) currentPrintRoyalty = currentPrice – printingCostsPerUnit; currentPrintRoyalty = Math.max(0, currentPrintRoyalty); var row = tableBody.insertRow(); row.insertCell().textContent = formatCurrency(currentPrice); row.insertCell().textContent = royaltyOption + "%"; row.insertCell().textContent = formatCurrency(currentEbookRoyalty.toFixed(2)); row.insertCell().textContent = formatCurrency(currentPrintRoyalty.toFixed(2)); row.insertCell().textContent = formatCurrency(estimatedDeliveryCost); row.insertCell().textContent = formatCurrency(printingCostsPerUnit); } } // Function to update the chart var royaltyChartInstance = null; // Store chart instance to destroy and recreate function updateChart(currentEbookRoyalty, currentPrintRoyalty, formatCurrency) { var ctx = document.getElementById('royaltyChart').getContext('2d'); // Destroy previous chart instance if it exists if (royaltyChartInstance) { royaltyChartInstance.destroy(); } var listPrice = parseFloat(document.getElementById('listPrice').value); var royaltyOption = parseInt(document.getElementById('royaltyOption').value); var pages = parseInt(document.getElementById('pages').value); var colorPages = parseInt(document.getElementById('colorPages').value); var deliveryCostsPerMB = parseFloat(document.getElementById('deliveryCosts').value); var printingCostsPerUnit = parseFloat(document.getElementById('printingCostsPerUnit').value); var currency = document.getElementById('currency').value; var averageEbookFileSizeBytes = 1024 * 1024 * 2; // 2MB var estimatedDeliveryCost = (deliveryCostsPerMB * averageEbookFileSizeBytes) / (1024 * 1024); if (isNaN(estimatedDeliveryCost) || estimatedDeliveryCost < 0) { estimatedDeliveryCost = 0.05; } var pricePoints = [1.99, 2.99, 4.99, 7.99, 9.99, 12.99, 15.99]; var ebookRoyalties = []; var printRoyalties = []; for (var i = 0; i < pricePoints.length; i++) { var price = pricePoints[i]; var eBookRoyalty = 0; var printRoyalty = 0; // eBook Royalty if (royaltyOption === 70) { eBookRoyalty = (price * 0.70) – estimatedDeliveryCost; } else { eBookRoyalty = price * 0.35; } ebookRoyalties.push(Math.max(0, eBookRoyalty)); // Print Royalty printRoyalty = price – printingCostsPerUnit; printRoyalties.push(Math.max(0, printRoyalty)); } royaltyChartInstance = new Chart(ctx, { type: 'line', data: { labels: pricePoints.map(function(p) { return formatCurrency(p); }), datasets: [{ label: 'Est. eBook Royalty', data: ebookRoyalties, borderColor: 'var(–primary-color)', backgroundColor: 'rgba(0, 74, 153, 0.1)', fill: false, tension: 0.1 }, { label: 'Est. Print Royalty', data: printRoyalties, borderColor: 'var(–success-color)', backgroundColor: 'rgba(40, 167, 69, 0.1)', fill: false, tension: 0.1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { callback: function(value) { return formatCurrency(value); } } } }, plugins: { tooltip: { callbacks: { label: function(context) { var label = context.dataset.label || ''; if (label) { label += ': '; } if (context.parsed.y !== null) { label += formatCurrency(context.parsed.y); } return label; } } } } } }); } // Function to copy results function copyResults() { var primaryResultLabel = document.getElementById('primaryResultLabel').textContent; var primaryResultValue = document.getElementById('primaryResultValue').textContent; var selectedRoyaltyOption = document.getElementById('selectedRoyaltyOption').textContent; var yourShare = document.getElementById('yourShare').textContent; var feesCosts = document.getElementById('feesCosts').textContent; var printCostPerUnitResult = document.getElementById('printCostPerUnitResult').textContent; var ebookDeliveryCostResult = document.getElementById('ebookDeliveryCostResult').textContent; var bookTitle = document.getElementById('bookTitle').value || "N/A"; var listPrice = document.getElementById('listPrice').value; var royaltyOption = document.getElementById('royaltyOption').value; var pages = document.getElementById('pages').value; var colorPages = document.getElementById('colorPages').value; var deliveryCostsPerMB = document.getElementById('deliveryCosts').value; var printingCostsPerUnitInput = document.getElementById('printingCostsPerUnit').value; var currency = document.getElementById('currency').value; var clipboardText = "— KDP Royalty Calculation Results —\n\n"; clipboardText += "Book Title: " + bookTitle + "\n"; clipboardText += "List Price: " + listPrice + " " + currency + "\n"; clipboardText += "Royalty Option Selected: " + selectedRoyaltyOption + "\n"; clipboardText += "Page Count (Print): " + pages + "\n"; clipboardText += "Color Pages (Print): " + colorPages + "\n"; clipboardText += "Delivery Cost Input (per MB): " + deliveryCostsPerMB + "\n"; clipboardText += "Printing Cost Input (per Unit): " + printingCostsPerUnitInput + " " + currency + "\n\n"; clipboardText += "— Key Estimates —\n"; clipboardText += primaryResultLabel + ": " + primaryResultValue + "\n"; clipboardText += "Your Share of List Price: " + yourShare + "\n"; clipboardText += "Amazon Fees/Costs (Est. eBook Delivery): " + feesCosts + "\n"; clipboardText += "Print Cost Per Unit: " + printCostPerUnitResult + "\n"; clipboardText += "Estimated eBook Delivery Cost: " + ebookDeliveryCostResult + "\n"; clipboardText += "\n— Based on Calculator Assumptions —\n"; clipboardText += "Assumed eBook Delivery Cost Calculation uses an average file size proxy. Actual delivery costs may vary.\n"; var textArea = document.createElement("textarea"); textArea.value = clipboardText; document.body.appendChild(textArea); textArea.select(); try { document.execCommand("copy"); alert("Results copied to clipboard!"); } catch (err) { console.error("Failed to copy results: ", err); alert("Could not copy results. Please copy manually."); } document.body.removeChild(textArea); } // Function to reset calculator to default values function resetCalculator() { document.getElementById('bookTitle').value = "My Awesome Book"; document.getElementById('listPrice').value = "9.99"; document.getElementById('royaltyOption').value = "70"; document.getElementById('pages').value = "250"; document.getElementById('colorPages').value = "0"; document.getElementById('deliveryCosts').value = "0.001"; // Lowered default slightly document.getElementById('printingCostsPerUnit').value = "3.50"; document.getElementById('currency').value = "USD"; // Clear errors document.getElementById('listPriceError').textContent = ''; document.getElementById('pagesError').textContent = ''; document.getElementById('colorPagesError').textContent = ''; document.getElementById('deliveryCostsError').textContent = ''; document.getElementById('printingCostsPerUnitError').textContent = ''; document.getElementById('bookTitleError').textContent = ''; document.getElementById('royaltyOptionError').textContent = ''; document.getElementById('currencyError').textContent = ''; // Recalculate with default values calculateRoyalties(); } // Initial calculation on page load window.onload = function() { // Add Chart.js library dynamically var chartjsScript = document.createElement('script'); chartjsScript.src = 'https://cdn.jsdelivr.net/npm/chart.js@3.7.0/dist/chart.min.js'; // Use a specific version chartjsScript.onload = function() { // Chart.js loaded, proceed with initial calculation and chart rendering calculateRoyalties(); }; chartjsScript.onerror = function() { alert('Failed to load charting library. Charts will not be available.'); // Still try to calculate royalties if chart lib fails calculateRoyalties(); }; document.head.appendChild(chartjsScript); // Setup FAQ accordions (simple toggle) var faqQuestions = document.querySelectorAll('.faq-question'); faqQuestions.forEach(function(question) { question.addEventListener('click', function() { var answer = this.nextElementSibling; if (answer.style.display === 'block') { answer.style.display = 'none'; } else { answer.style.display = 'block'; } }); // Initially hide answers if(question.nextElementSibling) { question.nextElementSibling.style.display = 'none'; } }); };

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