Discount Calculator
Compute final price, savings, and effective discount percentage in one click.
Written by Golam Rabbani, Founder & Lead Engineer
How to use this discount calculator
- Choose whether you have a percent-off discount or a fixed amount-off discount.
- Enter the original (pre-discount) price.
- Type the discount percentage (0–100) or the discount amount, depending on mode.
- Press Calculate to see the savings, the final price, and the effective percent off.
- Tap Copy to share the result, or Reset to clear and try another item.
About this discount calculator
The discount calculator works out how much you save and what you pay at checkout. In percent-off mode it multiplies the original price by the discount fraction: savings = price × (percent ÷ 100); the final price is original − savings. In amount-off mode it subtracts the fixed discount and derives the equivalent percent: percent = (amount ÷ price) × 100. These are the standard retail-discount formulas described in the U.S. Federal Trade Commission's pricing-and-advertising guidance (ftc.gov) and in every introductory consumer-math text.
Worked example: a USD 120 jacket is marked 25% off. Savings = 120 × 0.25 = USD 30. Final price = 120 − 30 = USD 90. If instead the sign said "USD 30 off", the calculator runs the math in reverse and reports the same USD 90 final price plus a 25.00% effective discount. The currency selector is just a label — there is no exchange-rate lookup — so the figures stay in whichever currency you typed.
FAQ
- What is the formula for a percent-off discount?
- Savings = original price × (percent ÷ 100). Final price = original price − savings. For example 25% off USD 120 gives 120 × 0.25 = USD 30 savings and a USD 90 final price.
- How do I convert an amount-off discount to a percent?
- Percent = (discount amount ÷ original price) × 100. The amount-off mode does this conversion for you and shows both numbers.
- Can I stack multiple discounts?
- This tool applies one discount at a time. To stack, run the calculator twice: first apply discount A, copy the result as the new "original" price, then apply discount B. Stacked percentages do not add — they compound.
- Does the discount include tax?
- No. The result is pre-tax. Run our Sales Tax Calculator on the final price if you also need the tax-inclusive number.
- What if the discount is more than 100%?
- A discount above 100% would mean the store pays you, which retailers do not do — the calculator caps percent-off at 100%. In amount-off mode it blocks discounts larger than the original price.
- Are my prices stored anywhere?
- No. The calculator runs entirely in your browser. Nothing is uploaded, logged, or saved between visits.