50% Off: sale price, savings and the reverse calculation
50% off is the same as paying 50 cents on the dollar. A $220.00 price drops to $110.00, saving $110.00. Below: a price table, the stacked-discount table, the reverse calculation and the mental-math shortcut for 50%.
Take 50% off any price
Prefilled with this page's numbers. Change either field; results update instantly and nothing is sent anywhere.
How the discount is calculated
saving = original × 50/100
Sale price = original × (1 − 50/100). For $220.00: $220.00 × 0.5 = $110.00. The saving is the difference, $110.00, or original × 50/100 directly.
50% off common prices
| Original price | Price after 50% off | You save |
|---|---|---|
| $9.99 | $5.00 | $5.00 |
| $19.99 | $9.99 | $9.99 |
| $29.99 | $14.99 | $14.99 |
| $49.99 | $25.00 | $25.00 |
| $79.99 | $39.99 | $39.99 |
| $99.99 | $49.99 | $49.99 |
| $149.99 | $75.00 | $75.00 |
| $199.99 | $100.00 | $100.00 |
| $499.99 | $250.00 | $250.00 |
| $999.99 | $500.00 | $500.00 |
A second discount on top of 50%
Stacked discounts do not add up. 50% off followed by a further 20% off is not 70% off; the second discount applies to the already reduced price, so the combined discount is 60%. On $220.00: $110.00 after the first discount, then $88.00 after the second.
| Discounts applied | Effective discount | Final price on $220.00 | Not |
|---|---|---|---|
| 50% then 5% more | 52.5% | $104.50 | 55% |
| 50% then 10% more | 55% | $99.00 | 60% |
| 50% then 15% more | 57.5% | $93.50 | 65% |
| 50% then 20% more | 60% | $88.00 | 70% |
| 50% then 25% more | 62.5% | $82.50 | 75% |
Reverse: from the sale price back to the original
Going backwards: if the sale price is $110.00 after 50% off, the original was $110.00 ÷ 0.5 = $220.00. Dividing by 0.5, not multiplying by 1.50, is the step people get wrong.
Mental math for 50%
For a seller, 50% off is deeper than most gross margins: any product with a margin below 50% sells at a loss at this discount, and a product bought at keystone (50% margin) loses 0% of its cost on every unit. Use the Profit Margin Calculator to check the line before running the promotion.