Percent Off Calculator
Work out the price after a percentage off, or the discount implied by two prices.
About Percent Off Calculator
A percentage-off discount removes a fixed fraction of the original price. To find the final price: multiply the original by the discount rate to get the dollar savings, then subtract. To find the implied discount from two prices: divide the difference by the original. Stacked discounts (e.g., 20% off, then 10% off) are not simply additive — two stacked discounts of 20% and 10% equal 28% off, not 30%.
Formulas
Final price
Final price = Original price × (1 − Discount% / 100)
- P_{orig}
- Original price
- d
- Discount percentage
Implied discount
Discount % = (Original price − Sale price) / Original price × 100
- P_{sale}
- Sale price
Worked example
With the default values below, Percent Off Calculator returns Final Price of $60.00. Change any input above and every figure here is recalculated in your browser.
Inputs used
- Calculateone of Final price after discount, Discount % from two prices
- Final price after discount
- Original Priceminimum 0 $
- 80 $
- Discount %accepts 0–100 %
- 25 %
- Sale Priceminimum 0 $
- 60 $
Results
- Final Price
- $60.00
- You Save
- $20.00
- Discount
- 25.00%
- You PayPercentage of the original price you actually pay.
- 75.00%
Step by step
- 1Amount saved= $20.00
- 2Final price= $60.00
Assumptions and limits
- The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
- In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
- Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
- This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.
How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.
Guides that use this calculator
Frequently Asked Questions
Why don't two stacked discounts add up?
Each subsequent discount is applied to the already-reduced price, not the original. A 20% discount on $100 gives $80. A further 10% on $80 gives $72 — a total of 28% off, not 30%. The formula is: combined = 1 − (1 − d1)(1 − d2).
How do I reverse a discount to find the original price?
Divide the sale price by (1 − discount/100). If you paid $75 after a 25% discount, the original was 75 / 0.75 = $100.
What's the difference between 'percent off' and 'percent of'?
'25% off $80' means you subtract 25% of $80, leaving $60. '25% of $80' is just $20. The distinction matters when reading sale tags — 'save 25%' and 'pay 25%' mean very different things.