Calculate Sale

Sale Price Calculator

Results

You Save:

Sale Price:

Total (with tax):

function calculateSalePrice() { var originalPrice = parseFloat(document.getElementById("originalPrice").value); var discountPercent = parseFloat(document.getElementById("discountPercent").value); var salesTax = parseFloat(document.getElementById("salesTax").value); var resultDiv = document.getElementById("saleResult"); var amountSavedSpan = document.getElementById("amountSaved"); var finalSalePriceSpan = document.getElementById("finalSalePrice"); var totalWithTaxSpan = document.getElementById("totalWithTax"); var taxRow = document.getElementById("taxRow"); if (isNaN(originalPrice) || originalPrice <= 0) { alert("Please enter a valid original price."); return; } if (isNaN(discountPercent) || discountPercent 100) { alert("Please enter a valid discount percentage between 0 and 100."); return; } var discountAmount = originalPrice * (discountPercent / 100); var salePrice = originalPrice – discountAmount; amountSavedSpan.innerText = "$" + discountAmount.toFixed(2); finalSalePriceSpan.innerText = "$" + salePrice.toFixed(2); if (!isNaN(salesTax) && salesTax > 0) { var taxAmount = salePrice * (salesTax / 100); var total = salePrice + taxAmount; totalWithTaxSpan.innerText = "$" + total.toFixed(2); taxRow.style.display = "block"; } else { taxRow.style.display = "none"; } resultDiv.style.display = "block"; }

Understanding Sale Calculations: How to Find the Best Deals

Calculating a sale price is a fundamental skill for savvy shoppers and business owners alike. Whether you are browsing a clearance rack or planning a promotional event, knowing exactly how much you are saving—and what the final total will be at the register—helps you manage your budget effectively.

The Formula for Sale Prices

The math behind a sale is straightforward. To find the discounted price, you follow two primary steps:

1. Calculate the Savings: Multiply the original price by the discount percentage (converted to a decimal).
   Example: $100 × 0.20 (20%) = $20 savings.
2. Subtract the Savings: Take the original price and subtract the savings amount.
   Example: $100 – $20 = $80 sale price.

The Impact of Sales Tax

It is important to remember that most sale tags do not include sales tax. The tax is typically calculated based on the final sale price, not the original price. Our calculator includes an optional tax field to give you the most accurate "out-the-door" price possible. If you are shopping in a region with 7% sales tax on an $80 sale item, you would add $5.60 ($80 × 0.07) for a total of $85.60.

Real-World Examples

Original Price	Discount	You Save	Sale Price
$50.00	10% OFF	$5.00	$45.00
$120.00	30% OFF	$36.00	$84.00
$250.00	50% OFF	$125.00	$125.00

Tips for Better Shopping

• Don't Forget the Cents: Retailers often use prices like $19.99. Use the calculator to see if the discount remains significant after rounding.
• Stacking Discounts: If a store offers "an extra 10% off the sale price," calculate the first sale price first, then apply the 10% to that new number.
• Unit Price: Even on sale, check the unit price (price per ounce or gram) to ensure you are actually getting a better value than the bulk or non-sale alternatives.