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Percentage tool

Discount Calculator

Calculate how much a percentage discount saves and what remains after the discount.

Free · Private · Runs in your browser

Percentage calculator

Enter an amount and discount

Enter the amount in any currency or unit. The calculator applies the rate you provide and does not recommend a discount.

Your result will appear here after you submit valid values.

How the calculation works

The saved amount is the original amount multiplied by the discount percentage divided by 100. The final amount is the original amount minus the saved amount.

Conventions and boundaries

  • Amount: may be entered in any currency or unit, but the calculator does not identify or convert currencies.
  • Discount: must be from 0% through 100%.
  • Rounding: calculation keeps full numeric precision; the page displays up to eight decimal places.
  • Scope: tax, shipping, stacked discounts, coupons, and merchant-specific rules are outside scope.

Common questions

Does this add sales tax?

No. It only applies the percentage discount you enter.

Can I use a currency?

Yes, enter the numeric amount. The result is in the same currency units, but no currency symbol or exchange-rate conversion is assumed.

Version and verification

Calculation version 1.0.0; deterministic fixtures last verified 2026-08-19.