Math & Everyday
Discount Calculator
Sale price, savings, and stacked discounts.
🔒 Runs entirely in your browser — nothing here is ever uploaded
CalcoTools · Discount Calculator · generated 8/23/2026, 1:06:26 PM
About the Discount Calculator
Calculates the final price and savings after applying a percentage discount, with support for a second stacked discount on top of the first.
How to use it
- Enter the Original price and Discount (%).
- Optionally enter an Additional discount (%) that stacks on the first.
- Read the final price, savings, and total discount in the readout.
Formula
After first discount = Price × (1 − discount% ÷ 100)
After second discount = previous result × (1 − extra% ÷ 100)
Worked example
A $120 item with 25% off, then an additional 10% off: $120 × 0.75 = $90, then $90 × 0.9 = $81.
Recommendations
- • Stacked discounts multiply, they don't add — 25% + 10% off isn't the same as 35% off.
- • Compare the total-discount figure to what a single equivalent percentage would be — stacked discounts are usually less than the sum suggests.
- • For the reverse question, working out an original price from a sale price, divide backward instead of multiplying.
Frequently asked questions
Each discount applies to a progressively smaller amount, so stacked percentage discounts always total less than simply adding the percentages together.