Percent Off Calculator
A tag showing “$35, was $50” is 30% off. Or “25% off” a $79 item means a $59.25 sale price. Enter any two values — original price, sale price, or discount percentage — and the third calculates automatically.
Last updated: April 2026
Percent off calculator
Enter any two of the three values — original price, percent off, or sale price — and the third will be calculated automatically.
How to calculate percent off
This calculator solves all three variations of the “percent off” problem. Enter any two values and it finds the third.
Sale price from original + % off: Sale price = Original × (1 − Percent off ÷ 100). For 25% off $80: $80 × 0.75 = $60.
Percent off from original + sale price: Percent off = ((Original − Sale) ÷ Original) × 100. If $80 dropped to $60: ((80 − 60) ÷ 80) × 100 = 25% off.
Original price from sale price + % off: Original = Sale ÷ (1 − Percent off ÷ 100). If $60 is 25% off: $60 ÷ 0.75 = $80.
Percent off quick reference
| % off | Multiply by | On $50 | On $100 | On $200 |
|---|---|---|---|---|
| 10% off | 0.90 | $45.00 | $90.00 | $180.00 |
| 15% off | 0.85 | $42.50 | $85.00 | $170.00 |
| 20% off | 0.80 | $40.00 | $80.00 | $160.00 |
| 25% off | 0.75 | $37.50 | $75.00 | $150.00 |
| 30% off | 0.70 | $35.00 | $70.00 | $140.00 |
| 50% off | 0.50 | $25.00 | $50.00 | $100.00 |
Percent off vs discount vs sale price
“25% off” and “25% discount” mean the same thing — the price is reduced by 25% of the original. The discount calculator covers the same formulas with a slightly different interface. If you also need to add sales tax after the discount, the discount + tax calculator handles both steps in one go and shows the true checkout total.
Stacked discounts
When two discounts are applied in sequence — for example, 20% off followed by an extra 10% off — they do not add up to 30%. The second discount is applied to the already-reduced price. $100 → 20% off = $80 → 10% off = $72. The combined effect is 28% off, not 30%.
Finding the original price from a sale price
If you know the sale price and the discount percentage, the original price is: Original = Sale price ÷ (1 − Percent off ÷ 100). You paid $63 and it was 30% off: $63 ÷ 0.70 = $90 original price. This is the most commonly misunderstood direction — many people try to add 30% back to $63, which gives $81.90, not the correct $90. Adding the percentage back doesn’t work because the 30% was taken off a larger base.
How retailers use percent off
Retailers set discount percentages strategically. Round numbers like 20%, 25%, 30%, and 50% are most common because they are easy to calculate mentally and feel substantial. A 33% discount is rarely used despite being equivalent to “buy 2, get 1 free” — the latter feels more compelling to shoppers even though the saving is identical. Luxury brands typically avoid large percentage discounts to protect brand perception, preferring fixed-amount reductions like “$50 off”.
Percent off vs sale price: which to compare?
When comparing discounts across items of different prices, percentage off is more meaningful than dollar savings. A $50 saving on a $100 item (50% off) is a much better deal than $50 off a $500 item (10% off). Conversely, for budgeting purposes, the absolute saving matters — $50 off a $60 item saves more cash than $50 off a $500 item even though the percentage is higher. Use the markup calculator to check whether a discounted price still covers your cost, or the sales tax calculator to see how tax affects your final checkout amount.
Frequently asked questions
$80 × 0.80 = $64. You save $16. Formula: $80 × (1 − 20 ÷ 100) = $80 × 0.80. Mental check: 20% of $80 is $16, so the sale price is $80 − $16 = $64.
Divide the sale price by (1 − percent off ÷ 100). If you paid $45 and it was 25% off: $45 ÷ 0.75 = $60 original price. Do not add the percentage back — that gives the wrong answer because the discount was taken off a larger base.
((100 − 70) ÷ 100) × 100 = 30% off. The formula is: ((Original − Sale) ÷ Original) × 100.
Yes — “25% off” and “25% discount” mean the same thing. The price is reduced by 25% of the original amount.
No. Stacked discounts do not add up. 20% off $100 = $80, then 10% off $80 = $72. The combined effect is 28% off, not 30%. The second discount applies to the already-reduced price.
$35 × 0.50 = $17.50. A 50% discount always halves the price, so you can skip the multiplication and just divide by 2. Saving = $17.50.
Yes — completely free, no signup, no ads. Results calculate instantly in your browser.