Skip to content
Quickora
Menu

Discount Calculator

See the sale price and how much you save with a percentage discount. Handles stacked discounts (like an extra 10% off at checkout) and adds sales tax if you need it.
$
%
%
%
You pay
$60.00
You save
$20.00
Total discount
25%
Sales tax
$0.00

Get new free tools from Quickora

Join the list and I’ll send you new calculators, converters, and everyday utilities when they launch.

No spam. Unsubscribe anytime.

How to use it

  1. Enter the original price.
  2. Enter the discount percentage. Add an extra discount if a second promotion applies after the first.
  3. Optionally add your sales tax rate to see what you'll actually pay at the register.

Examples

25% off $80

You save $20, so the sale price is $60.

Stacked discounts aren't additive

20% off plus an extra 10% off a $100 item gives $72, not $70. The second discount applies to the already reduced $80, for an effective 28% off.

How the sale price is calculated

Multiply the price by (1 − discount ÷ 100). For 25% off, you pay 75% of the price. A second discount multiplies again by its own factor, so stacked discounts compound rather than add up.

Sales tax, if you add it, is applied to the discounted price, which is how most US retailers calculate it.

sale price = price × (1 − d₁ ÷ 100) × (1 − d₂ ÷ 100)

Frequently asked questions

Is 20% off then 10% off the same as 30% off?

No. The second discount applies to the reduced price, so the combined discount is 1 − 0.8 × 0.9 = 28%, slightly less than 30%.

How do I find the original price from a sale price?

Divide the sale price by (1 − discount ÷ 100). An item that costs $60 after 25% off was originally 60 ÷ 0.75 = $80.

Is tax charged before or after the discount?

In most US states, sales tax is charged on the discounted price for store discounts. Manufacturer coupons are sometimes taxed on the pre-coupon price; rules vary by state.

Related tools

Percentage Decrease CalculatorFind how much a value fell in percentage terms. Enter the original and new values to get the percentage decrease, the amount lost and what share of the original remains.Tip CalculatorWork out the tip and total for any bill, split it between any number of people, and optionally round each share up to a whole dollar.Percentage CalculatorFind X% of a number, what percent one number is of another, or the percentage change between two values. Results update as you type and show the working.Sales Tax CalculatorAdd sales tax to a price, or work backwards from a tax-inclusive total to find the price before tax and how much of it was tax.

Found this useful? Quickora is free to use — buy us a coffee (opens in a new tab) to help keep it that way.

More in Money · Last reviewed September 2026