Percent Off Calculator (Discounts)
A percent-off deal has two numbers worth knowing: what you save and what you still pay. Take 25% off an $80 jacket — the discount is $20, so the till shows $60. Computing the final price directly (multiply by what's left of 100%) is faster than subtracting the saving.
The formula
Sale price = Original × (1 − Discount ÷ 100)
How to calculate it
- Subtract the discount from 100 to get the percent you still pay (25% off → 75%).
- Convert to a decimal (0.75).
- Multiply the original price by it (80 × 0.75 = 60).
Worked example
25% off $80: you save 80 × 0.25 = $20 and pay 80 × 0.75 = $60.
Quick reference table
| Original | Discount | You pay |
|---|---|---|
| $80 | 25% | $60 |
| $50 | 10% | $45 |
| $120 | 30% | $84 |
| $200 | 15% | $170 |
| $65 | 20% | $52 |
| $40 | 50% | $20 |
Related percentage calculators
- What Is X Percent of Y?
- Percentage Increase Calculator
- Percentage Decrease Calculator
- X Is What Percent of Y?
Or use the general percentage calculator for all three percentage questions in one place.
Frequently asked questions
How do I calculate a percent-off price?
Multiply the original price by (100 − discount) ÷ 100. For 30% off $120: 120 × 0.70 = $84. The saving is the original minus that, $36.
How do stacked discounts work — 20% off then 10% off?
They multiply, not add. 20% then 10% leaves 0.80 × 0.90 = 0.72 of the price — a 28% total discount, not 30%.
How do I add sales tax after a discount?
Apply the discount first, then the tax on the discounted price. $100 at 25% off with 8% tax: 100 × 0.75 × 1.08 = $81.