# What's the sale price?

Enter the original price and the discount. See what you pay, what you save and the price with tax.

 Original price ($)
 Discount (% off)
 Extra discount (% off, stacked)
 Sales tax (%)

A 25% then 10% discount is 32.5% off, not 35%.

## Price at common discounts

## How it works

Sale price = original × (1 − discount). Stacked discounts multiply: (1 − first) × (1 − second). Tax is charged on the sale price.

Is the "original" price real? Many sales start from a list price nobody pays. [Is this a good price?](https://sharpest.ai/tools/price-check) compares an offer with what the same item sells for on eBay today and its 30-day low.

## Questions

### How do I calculate a percentage discount?

Multiply the price by the discount and subtract it, or multiply the price by one minus the discount. 25% off $120 is 120 × 0.75 = $90.

### How do stacked discounts work?

Each discount applies to the price left after the one before. 25% off and then an extra 10% off gives 120 × 0.75 × 0.9 = $81, a 32.5% total discount, not 35%.

### How do I find the percent off from two prices?

Divide the sale price by the original price and subtract from one. A $90 sale on a $120 item is 1 − 90/120 = 25% off.

### Is the sale price a good deal?

Only if the original price is one people actually paid. Many "was" prices are list prices nobody charges; compare the sale with what the same item sells for elsewhere and with its recent low before you buy.

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As of 2026-11-12. Canonical page: https://sharpest.ai/tools/discount