Calculate savings and sale prices. Available with Premium in The Percentage Calculator app.
A monthly plan or lifetime Premium purchase is required for this feature.
Use the Premium discount calculator to work out the saving and sale price from an original price and a percentage discount.
Open the discount calculator in the app’s calculator list. This mode requires Premium.
Start with the original price and the advertised discount percentage. The example shows how much you save and what remains to pay.
Allow for tax, delivery and any exclusions separately when they are not part of the quoted price.
Store listings: App Store and Google Play. Check your store for compatibility and current purchase options.
To find a sale price, multiply the original price by one minus the discount rate as a decimal. The saving is the original price multiplied by the rate.
For two successive discounts, apply each rate to the updated price. A 20% discount followed by 10% gives 28% off overall, rather than 30%.
A percentage discount reduces the price by a share of the original amount. With an original price of 150 and 20% off, the saving is 150 × 0.20 = 30. Subtract that saving to get the sale price: 150 − 30 = 120.
| What you want | Formula | Example |
|---|---|---|
| Amount saved | original × discount ÷ 100 | 150 × 20 ÷ 100 = 30 |
| Final price | original × (1 − discount ÷ 100) | 150 × 0.80 = 120 |
| Discount percentage | (original − sale) ÷ original × 100 | (150 − 120) ÷ 150 × 100 = 20% |
These are fixed examples. Enter your own purchase values in the Premium discount feature after downloading the app.
Two reductions apply to different prices. Starting at 100, a 20% discount leaves 80. A further 10% off that 80 saves another 8 and leaves 72. The combined saving is 28%, calculated as 1 − (0.80 × 0.90).
A percentage discount also differs from a fixed amount off. Taking 20 off a price of 150 gives 130; taking 20% off gives 120. Check whether a promotion states a percent or a currency amount.
Taxes, delivery charges and coupon restrictions can affect the amount due. The examples here compare item prices before those extra conditions. Use the checkout total to confirm the final charge.
If you know the original and sale prices and need the reduction rate, the free percentage change calculator returns the signed decrease. From 150 to 120, it shows −20%.
If you know only the reduced price and the discount rate, see reverse percentages to recover the original price. For a quick saving amount from a known rate, use the free percentage of a value calculator.
The arithmetic is the same for a single reduction. A shopping calculation also identifies the amount saved and the price left to pay.
Use the discount mode in the app with Premium. This page shows fixed sale-price examples; the four core percentage modes are free online and in the app.
You save 30 for every 100 of the original price and pay the remaining 70%. An item priced at 200 therefore costs 140 before any extra charges.
No. A price of 100 becomes 50 after the first discount and 25 after the second. You save 75% overall.
