How to calculate a discount
The sale price is the original price minus the discount. In numbers: Sale price = Original × (1 − discount ÷ 100). The amount you save is the original price minus the sale price.
Sale price table
What you pay after common discounts. Read $ as your own currency.
| Original price | 10% off | 15% off | 20% off | 25% off | 30% off | 40% off | 50% off | 70% off |
|---|---|---|---|---|---|---|---|---|
| $10.00 | $9.00 | $8.50 | $8.00 | $7.50 | $7.00 | $6.00 | $5.00 | $3.00 |
| $20.00 | $18.00 | $17.00 | $16.00 | $15.00 | $14.00 | $12.00 | $10.00 | $6.00 |
| $25.00 | $22.50 | $21.25 | $20.00 | $18.75 | $17.50 | $15.00 | $12.50 | $7.50 |
| $30.00 | $27.00 | $25.50 | $24.00 | $22.50 | $21.00 | $18.00 | $15.00 | $9.00 |
| $40.00 | $36.00 | $34.00 | $32.00 | $30.00 | $28.00 | $24.00 | $20.00 | $12.00 |
| $50.00 | $45.00 | $42.50 | $40.00 | $37.50 | $35.00 | $30.00 | $25.00 | $15.00 |
| $60.00 | $54.00 | $51.00 | $48.00 | $45.00 | $42.00 | $36.00 | $30.00 | $18.00 |
| $75.00 | $67.50 | $63.75 | $60.00 | $56.25 | $52.50 | $45.00 | $37.50 | $22.50 |
| $80.00 | $72.00 | $68.00 | $64.00 | $60.00 | $56.00 | $48.00 | $40.00 | $24.00 |
| $100.00 | $90.00 | $85.00 | $80.00 | $75.00 | $70.00 | $60.00 | $50.00 | $30.00 |
| $120.00 | $108.00 | $102.00 | $96.00 | $90.00 | $84.00 | $72.00 | $60.00 | $36.00 |
| $150.00 | $135.00 | $127.50 | $120.00 | $112.50 | $105.00 | $90.00 | $75.00 | $45.00 |
| $200.00 | $180.00 | $170.00 | $160.00 | $150.00 | $140.00 | $120.00 | $100.00 | $60.00 |
| $250.00 | $225.00 | $212.50 | $200.00 | $187.50 | $175.00 | $150.00 | $125.00 | $75.00 |
| $500.00 | $450.00 | $425.00 | $400.00 | $375.00 | $350.00 | $300.00 | $250.00 | $150.00 |
| $1,000.00 | $900.00 | $850.00 | $800.00 | $750.00 | $700.00 | $600.00 | $500.00 | $300.00 |
Stacked (double) discounts
When a store offers "an extra 10% off already-reduced items", the second discount applies to the first sale price, not the original. That's why two discounts always combine to less than their simple sum.
What is 30% off $50?
$35.00. You save $15.00 (30% of $50), so you pay the remaining 70%: 50 × 0.70 = $35.00.
What is 25% off $80?
$60.00 — you save $20.00.
How do I calculate a percentage off a price?
Multiply the price by (1 − the discount as a decimal). For 40% off $120: 120 × 0.60 = $72.00. To find just the saving, multiply by the discount alone: 120 × 0.40 = $48.00.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount ÷ 100). e.g. a £60 item at 25% off originally cost 60 ÷ 0.75 = £80.