Percent off Calculator

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percent off calculator
Calculate Sale Price (given Original Price & % Off)Calculate Percent Off (given Original & Sale Price)Calculate Original Price (given Sale Price & % Off)
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function updateLabels(){var mode=document.getElementById('given_data').value;var l1=document.getElementById('label1');var l2=document.getElementById('label2');var l3=document.getElementById('label3′);if(mode=='sale_price'){l1.innerHTML='Original Price: $';l2.innerHTML='Percent Off: %';l3.style.display='block';document.getElementById('input3′).style.display='block';}else if(mode=='percent_off'){l1.innerHTML='Original Price: $';l2.innerHTML='Sale Price: $';l3.style.display='none';document.getElementById('input3′).style.display='none';}else if(mode=='original_price'){l1.innerHTML='Sale Price: $';l2.innerHTML='Percent Off: %';l3.style.display='none';document.getElementById('input3′).style.display='none';}}function calculateResult(){var mode=document.getElementById('given_data').value;var v1=parseFloat(document.getElementById('input1').value);var v2=parseFloat(document.getElementById('input2').value);var tax=parseFloat(document.getElementById('input3').value)||0;var showSteps=document.getElementById('steps').checked;var resBox=document.getElementById('answer');if(isNaN(v1)||isNaN(v2)){resBox.innerHTML="Please enter valid numbers.";return;}var output="";if(mode=='sale_price'){var savings=v1*(v2/100);var salePrice=v1-savings;var taxAmt=salePrice*(tax/100);var finalTotal=salePrice+taxAmt;output="
Sale Price: $"+salePrice.toFixed(2)+"
";if(showSteps){output+="
Steps:
1. Savings = $"+v1.toFixed(2)+" × ("+v2+" / 100) = $"+savings.toFixed(2)+"
2. Sale Price = $"+v1.toFixed(2)+" – $"+savings.toFixed(2)+" = $"+salePrice.toFixed(2);if(tax>0){output+="
3. Tax = $"+salePrice.toFixed(2)+" × ("+tax+" / 100) = $"+taxAmt.toFixed(2)+"
4. Total = $"+salePrice.toFixed(2)+" + $"+taxAmt.toFixed(2)+" = $"+finalTotal.toFixed(2);}}else{output+="Savings: $"+savings.toFixed(2);}}else if(mode=='percent_off'){var diff=v1-v2;var pOff=(diff/v1)*100;output="
Percent Off: "+pOff.toFixed(2)+"%
";if(showSteps){output+="
Steps:
1. Amount Saved = $"+v1.toFixed(2)+" – $"+v2.toFixed(2)+" = $"+diff.toFixed(2)+"
2. Percent Off = ($"+diff.toFixed(2)+" / $"+v1.toFixed(2)+") × 100 = "+pOff.toFixed(2)+"%
";}}else if(mode=='original_price'){var oPrice=v1/(1-(v2/100));output="
Original Price: $"+oPrice.toFixed(2)+"
";if(showSteps){output+="
Steps:
1. Decimal Discount = "+v2+" / 100 = "+(v2/100).toFixed(2)+"
2. Original Price = $"+v1.toFixed(2)+" / (1 – "+(v2/100).toFixed(2)+") = $"+oPrice.toFixed(2)+"
";}}resBox.innerHTML=output;}

Percent Off Calculator Use

Shopping for bargains is easier when you have a percent off calculator at your fingertips. Whether you are browsing a seasonal sale, evaluating a coupon code, or trying to find the best deal at a retail outlet, this tool helps you instantly see the final price and your total savings.

Our calculator is versatile. You can calculate the final sale price if you know the discount, find the original price if you only know what you paid, or even figure out exactly what percentage you saved on a clearance item.

Original Price ($)
The initial price of the item before any discounts or markdowns are applied.
Percent Off (%)
The percentage discount being offered (e.g., 20%, 50%, or 75% off).
Sales Tax (%)
Optional field. Enter your local sales tax to see the absolute final out-of-pocket cost.

How It Works: The Formulas

To use a percent off calculator manually, you need to understand the relationship between the original price, the discount rate, and the final price. Here are the primary formulas used by our tool:

Sale Price = Original Price × (1 – (Discount % / 100))

If you want to find the savings amount specifically:

Savings Amount = Original Price × (Discount % / 100)

  • Original Price: The benchmark price before the sale.
  • Discount %: The "off" amount expressed as a fraction of 100.
  • Sale Price: What you pay at the register (before taxes).

Calculation Example

Example: You find a designer coat originally priced at $240.00. The store is running a "35% Off" promotion, and your local sales tax is 8%.

Step-by-step solution:

  1. Original Price = $240.00
  2. Percent Off = 35% (0.35 in decimal)
  3. Calculate Savings: $240.00 × 0.35 = $84.00
  4. Calculate Sale Price: $240.00 – $84.00 = $156.00
  5. Calculate Tax: $156.00 × 0.08 = $12.48
  6. Final Result: Total Cost = $168.48

Common Shopping Questions

How do I calculate 20% off in my head?

To quickly calculate 20% off, first find 10% of the price by moving the decimal point one place to the left. Then, double that number to get 20%. Subtract that from the original price. For example, 10% of $60 is $6; doubling it gives $12. $60 – $12 = $48.

Is "percent off" the same as "percent of"?

No. "Percent off" refers to the discount amount being removed. "Percent of" refers to the remaining portion. For example, 20% OFF a $100 item means you save $20 and pay $80. In this case, you are paying 80% OF the original price.

Does the calculator handle double discounts?

Most "double discounts" (like 20% off plus an extra 10% off for cardholders) are calculated sequentially, not added together. You would first apply the 20% discount to the original price, then apply the 10% discount to that new, lower sale price.

Why Use Our Percent Off Calculator?

Accuracy is key when managing a budget. While mental math is a great skill, using a dedicated percent off calculator ensures you aren't surprised by the total when you reach the checkout counter. Our tool is optimized for mobile use, making it the perfect companion for in-store shopping trips.

Beyond simple shopping, this calculator is highly useful for businesses setting clearance prices, employees calculating staff discounts, and students learning basic retail mathematics.

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