Percent off a price
A markdown of p percent means you pay (100 − p) percent of the original price. This calculator first finds the amount saved as price × percent ÷ 100, rounded half up to the nearest cent, then subtracts that from the original price.
The FTC Guides Against Deceptive Pricing discuss how advertised “was / now” prices should relate to a real former price. This tool only does the arithmetic on the two numbers you type. It does not check that a crossed-out price was genuine.
Rounding
15% of $19.99 is $2.9985, which becomes a $3.00 saving and a $16.99 sale price. 100% off is $0.00. A discount above 100% is rejected so the sale price cannot go negative.
Example
25% off $80.00 saves $20.00 and costs $60.00. 50% off $0.01 saves $0.01 and costs $0.00.
Limits
Stacked coupons, dollar-off codes, BOGO, tax and shipping are out of scope. For the percent identity without money rounding, use the percentage calculator. For how much a price moved, use the percentage change calculator.
Frequently asked questions
Is 25% off the same as paying 75%?
Yes after this rounding step: the saved amount is rounded once, then
subtracted. We do not round the 75% price separately, which could differ by a
cent.
Why not allow more than 100% off?
That would invent a negative price. A rebate or cash-back offer needs its own
terms.
Are prices sent to analytics?
No. Analytics may record that this calculator ran. The price and percent stay
in the browser.
Sources & review
- Guides Against Deceptive Pricing — Federal Trade Commission
- How to Calculate Percent Changes — U.S. Bureau of Labor Statistics
Last reviewed: . The formula is reproduced above so you can check the math independently.
Educational estimate only. Tax, shipping, stacked coupons and whether an advertised former price is genuine are not checked.