Discount Calculator
No more guessing whether a sale is worth it. Enter the price and percent off, and see exactly what you pay and what you save.
Last updated: August 5, 2026
How discounts work
A percentage discount removes a share of the original price: 25% off $89 means you pay $89 minus 25% of $89. The maths is simple, but doing it in your head while a shop assistant watches is not, which is exactly what this tool is for.
One thing worth knowing: a discount is applied to the price before tax, and tax is then charged on the discounted price, not the original. So the saving on your final till receipt is slightly larger than the sticker discount suggests.
Stores also use percentage wording loosely — "up to 70% off" usually means most items are discounted less. Enter the real percentages you find and the calculator keeps the whole trip honest.
The formulas
Worked example
An item priced at $89 with 25% off.
Saving = 89 × 0.25 = $22.25. Sale price = 89 − 22.25 = $66.75.
Buying two of them shows the total at $133.50 — handy before the till does the talking.
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Frequently asked questions
How do I calculate a 10% discount by hand?
Move the decimal point one place left: 10% of $89 is $8.90. For other percentages, double it for 20%, halve it for 5%, and combine them for anything else (25% = 20% + 5%).
Is a 20% discount better than a $20 coupon?
It depends on the price. 20% beats a $20 coupon on anything priced above $100 and loses below that. The calculator handles both cases: put the coupon amount in as a percent off if the item is priced such that percent equals it.
Can I combine two discounts?
Sometimes. When two discounts apply, they are usually taken one after another, so 20% then 10% is 28% total, not 30%. Check how the store orders them and enter the combined result here.