Percent Off Calculator
Enter price and discount % — see sale price instantly
How Percent Off Works
Enter the original (full) price and the discount percentage. The calculator instantly shows the final sale price, how much you save, and a visual breakdown of the cost.
Example: 20% off $100 → Save = $100 × 0.20 = $20 → Sale price = $100 − $20 = $80
Click Any Example to Calculate
| Original | Discount | Sale Price | You Save |
|---|---|---|---|
| $50 | 10% off | $45.00 | −$5.00 |
| $100 | 20% off | $80.00 | −$20.00 |
| $200 | 25% off | $150.00 | −$50.00 |
| $150 | 30% off | $105.00 | −$45.00 |
| $80 | 50% off | $40.00 | −$40.00 |
| $500 | 40% off | $300.00 | −$200.00 |
| $75 | 15% off | $63.75 | −$11.25 |
| $300 | 70% off | $90.00 | −$210.00 |
Common Percent Off Calculation Mistakes
- Stacking discounts incorrectly — 20% off + 10% off does NOT equal 30% off. It equals 28% off. Each discount applies to the already-reduced price.
- Calculating from sale price instead of original — percent off is always calculated on the original price, not the discounted one.
- Confusing "% off" with "pay X%" — "30% off" means you pay 70%. Make sure you're calculating the right number.
- Trusting inflated original prices — some retailers inflate the "original" price before applying a discount. Always research actual retail price before assuming you're saving.
Why Percent Off Calculations Matter
- Real savings vs. perceived savings — a 20% discount on a $500 item saves more than a 50% discount on a $150 item. Always calculate actual dollar savings.
- Black Friday and sale events — verifying advertised discounts protects you from misleading marketing.
- Budget planning — knowing the exact sale price helps you plan purchases and stay within budget.
- Business pricing — retailers, freelancers, and wholesalers use percent off calculations daily for pricing and negotiation.
Frequently Asked Questions
What is 20% off $100?
20% off $100 is $80. You save $20. Calculation: $100 × (1 − 0.20) = $80.
What is 30% off $50?
30% off $50 is $35. You save $15. Calculation: $50 × 0.70 = $35.
How do I find the original price from a discounted price?
Divide the sale price by (1 − discount%). Example: $80 sale price at 20% off → $80 ÷ 0.80 = $100 original.
What is 50% off?
50% off means the item is exactly half price. A $200 item at 50% off costs $100.
Can I stack two discounts?
No — stacked discounts do not add up. 20% off then another 10% off ≠ 30% off. The second discount applies to the already-reduced price: $100 → $80 → $72 (not $70).
What is 10% off $100?
10% off $100 is $90. You save $10. Calculation: $100 × (1 − 0.10) = $90. Quick trick: move the decimal one place left — 10% of any price is just that number ÷ 10.
What is 20% off $50?
20% off $50 is $40. You save $10. Calculation: $50 × 0.80 = $40.
What is 15% off $80?
15% off $80 is $68. You save $12. Calculation: $80 × (1 − 0.15) = $80 × 0.85 = $68.
What is 25% off $200?
25% off $200 is $150. You save $50. Quick rule: 25% off = divide price by 4 and subtract. $200 ÷ 4 = $50 savings → $150 sale price.
What is 40% off $75?
40% off $75 is $45. You save $30. Calculation: $75 × 0.60 = $45.
How do I calculate a percentage discount in my head?
Use these shortcuts: 10% off = move decimal left. 20% off = double 10%. 25% off = divide by 4. 50% off = divide by 2. For other percents, use the calculator above for instant results.
Shopping Tips
- Stack coupons with sale prices — many stores allow a coupon on top of an existing sale.
- Compare unit prices — 20% off $50 saves the same as 10% off $100 ($10 each).
- Verify original prices — some retailers inflate prices before discounting.
- Black Friday averages — typical discounts range 30%–70% on electronics.