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Discount Calculator

Enter the original price and a discount percentage or amount to instantly get the sale price, discount amount, and savings. Reverse, stacking, and tax options included.

Last updated: 2026/10/16 Calculator Feedback & bug reports
$
%
Sale price $0
Original price$0
You save$0
Discount rate0%

How to Use

1

Enter the original price

Type the original (list) price of the item. Commas are handled automatically.

2

Set the discount

Choose a percentage or fixed amount and enter the value. Add sales tax if needed.

3

See the result

The sale price, discount amount, and savings appear instantly. Use the copy button to share.

About the Discount Calculator

A discount calculator that instantly answers "What is 20% off?" or "How much do I save with this coupon?". It supports both percentage and fixed-amount discounts, reverse-calculates the discount rate from a sale price, stacks multiple coupons, and shows the final tax-inclusive price. Everything runs in your browser and no data is sent to any server.

Features

  • Real-time calculationThe sale price and savings update as you type. No button press required.
  • Reverse & stackingFind the discount rate from a sale price and accurately stack multiple discounts.
  • Tax optionsSee the final tax-inclusive price with 8% or 10% sales tax applied.
  • Privacy firstAll processing happens in your browser. Your prices are never sent to a server.

Use Cases

  • Check what "% OFF" sales actually cost
  • Calculate the price after a coupon or point discount
  • Reverse the discount rate from a sale price and list price
  • Stack multiple discounts like "extra 10% off"
  • See the final amount including sales tax

FAQ

How is the discounted price calculated?
For a percentage, it is "original price × (1 − rate ÷ 100)". For a fixed amount, it is "original price − discount amount". Your savings equals the original price minus the sale price.
What does "Find Discount %" do?
When you know the original and sale prices, it reverse-calculates the percentage off: rate = (1 − sale ÷ original) × 100. Handy for verifying how much a flyer or online deal really takes off.
Can I just add stacked discounts together?
No. "20% off then another 10% off" is not 30% off: 0.8 × 0.9 = 0.72, which is 28% off. The Stacked tab applies each discount in order and shows the exact final price and effective rate.
Is tax applied before or after the discount?
As at a typical checkout, tax is added to the post-discount (pre-tax) price to get the tax-inclusive total. You can choose None, 8%, or 10%.
Are my entered prices stored or sent anywhere?
No. All calculations run locally in your browser with JavaScript. Your prices and discount data are never sent to or stored on any server.
Does it work on smartphones?
Yes. It works in all browsers on smartphones, tablets, and PCs, so you can quickly check sale prices while shopping.

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