Decision tools built for clarity
Discount Calculator
Calculate a discount amount and the resulting sale price.
Enter the required values, select the applicable options, and calculate.
Methodology
Formula or transformation
Applies the entered percentage to the original price and subtracts the exact discount amount.
Variables
- Original price
- Discount percentage
- Discount amount
- Sale price
Units
- Currency
- Percent
Rounding policy
Money values are rounded to the declared currency scale using half away from zero for display.
The discount amount equals the original price multiplied by the entered percentage divided by 100; the sale price subtracts that amount.
Calculate a discount amount and the resulting sale price.
Reviewed sources
- NIST — Rules and style conventions for expressing values Reviewed on 2026-09-07
Formula review history
-
Initial formula and source review.
Reviewed 2026-09-07 for formula version discount-price-v1
Assumptions
- Inputs are interpreted using the displayed units and options.
- The calculation follows the methodology and factors listed in the sources.
Limitations
- Display rounding can hide additional decimal places.
- The calculation cannot add accuracy that is absent from the submitted inputs.
Worked example
A 25% discount on 100 produces a discount amount of 25 and a sale price of 75.
Frequently asked questions
How is the sale price calculated?
The discount percentage is applied to the original price, then that discount amount is subtracted from the original price.
Can a discount be more than 100%?
No. This calculator accepts discounts from 0% through 100%; a 100% discount produces a zero sale price.