Percent Off Calculator
Enter a price and a discount to instantly see the sale price and how much you save. Tap a quick‑percentage button or type any amount.
How to use this calculator
Type the original price and the percent off, or tap one of the quick buttons (10%, 15%, 20%, 25%, 50%, 70%). The calculator instantly shows the final price you'll pay and the exact dollar amount you save. All results update in real time as you type.
How percent-off discounts work
A percent-off discount removes a proportional share of a price. The word "percent" literally means "per hundred," so 25% off means you remove 25 out of every 100 units of value. To convert a percentage to a usable multiplier, divide it by 100 — 25% becomes 0.25. Multiply the original price by that decimal to find the savings in dollars, then subtract from the original price to get the sale price.
A useful shortcut: the final price multiplier is (1 − discount as a decimal). For 25% off, you pay 1 − 0.25 = 0.75, or 75% of the original price. You can go directly from original price to final price in one step: $80 × 0.75 = $60.
Worked examples
Example 1 — 25% off $59.99
- Convert the discount: 25% ÷ 100 = 0.25
- Savings = $59.99 × 0.25 = $15.00
- Final price = $59.99 − $15.00 = $44.99
Example 2 — 15% off $129.00
- Convert the discount: 15% ÷ 100 = 0.15
- Savings = $129.00 × 0.15 = $19.35
- Final price = $129.00 − $19.35 = $109.65
- Shortcut check: $129 × 0.85 = $109.65 ✓
Example 3 — finding the original price from a sale price
A pair of shoes is $68 after a 20% discount. What was the original price?
- After 20% off you paid 80% of the original (1 − 0.20 = 0.80).
- Original = $68 ÷ 0.80 = $85.00
- Check: $85 × 0.20 = $17 off → $85 − $17 = $68 ✓
Example 4 — stacked discounts
An item is already 10% off, and you have a 20% off coupon. The final price is not 30% off.
- After the 10% sale: you pay 90% of original, so $100 × 0.90 = $90.
- After the 20% coupon: you pay 80% of that, so $90 × 0.80 = $72.
- Combined saving = $100 − $72 = $28, which is 28%, not 30%.
Common mistakes to avoid
- Adding stacked discounts together. A 10% sale plus a 20% coupon is not 30% off — the second discount applies to the already-reduced price.
- Forgetting that tax applies after the discount. Sales tax is calculated on the final discounted price, not the original. Budget accordingly.
- Comparing "percent saved" across different original prices. Saving 30% on a $20 item ($6) is very different from saving 30% on a $500 item ($150). Consider both the percentage and the dollar amount.
- Miscalculating the reverse. To find the original price from a sale price, divide by the remaining percentage — do not subtract the discount percentage from the sale price directly.
The formulas
Savings = Price × (Percent ÷ 100) · Final price = Price − Savings
Final price (one step) = Price × (1 − Percent ÷ 100)
Reverse — original price from sale price: Original = Sale price ÷ (1 − Percent ÷ 100)
How we calculate this
Frequently asked questions
How do you calculate a percent off?
Multiply the original price by the discount percentage to get the amount saved, then subtract that from the original price. For example, 25% off $60 is $60 × 0.25 = $15 saved, so the final price is $45.
What is 20% off $50?
20% of $50 is $10, so 20% off $50 leaves a final price of $40. Enter any price and percentage above to get the exact numbers instantly.
How do I calculate the original price from a sale price?
Divide the sale price by (1 minus the discount as a decimal). If an item is $45 after 25% off, the original price was $45 ÷ 0.75 = $60.
Does this include sales tax?
No. This shows the discounted price before tax. Sales tax is added afterward on the final discounted price, and the rate varies by location.
What is 30% off $120?
Savings = $120 × 0.30 = $36. Final price = $120 − $36 = $84. You save $36 and pay $84 before any applicable tax.
How do stacked discounts work?
Discounts applied one after another multiply rather than add. A 20% off coupon on a 10% off sale price means you pay 80% of 90% = 72% of the original price — a combined saving of 28%, not 30%.
What is the difference between percent off and percentage points off?
Percent off is relative to the original price (20% off $100 = $20). Percentage points describe an arithmetic difference between two percentage figures, unrelated to a base price.
How do I quickly estimate a discount in my head?
For 10% off, move the decimal one place left (10% of $79 ≈ $7.90). For 20% off, double that ($15.80). For 25% off, divide by four. For 50% off, halve the price. These shortcuts get you very close without a calculator.