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HexaCalc

Percentage Off Calculator

Shopping a sale? This percentage off calculator shows the final price after a discount and exactly how much money you save. Add your state's sales tax to see what you'll actually pay at the register.

Already know the original and sale prices? Use the second calculator to find the percent off.

$
%
%
Results update as you type.
Sale price
$60.00
You save
$20.00

Steps

  1. $80.00 × 25% = $20.00 off
  2. $80.00 − $20.00 = $60.00

Find the percent off from two prices

$
$
Results update as you type.
Percent off
25%
Amount saved
$30.00

Steps

  1. ($120.00 − $90.00) ÷ $120.00 × 100 = 25%

Worked example

Example: a $80 jacket at 25% off

  1. Savings = $80 × 25% = $80 × 0.25 = $20
  2. Sale price = $80 − $20 = $60
  3. Shortcut: $80 × (1 − 0.25) = $60

You pay $60 and save $20.

Formula

Sale price = Price × (1 − Percent off ÷ 100)

Percent off = (Original − Sale) ÷ Original × 100

Stacked discounts multiply, they don't add: 20% off and then an extra 10% off is 1 − 0.8 × 0.9 = 28% off, not 30%.

Frequently asked questions

How do you calculate a percentage off?

Multiply the price by the percentage as a decimal to get the savings, then subtract it from the price. 30% off $45 is $45 × 0.30 = $13.50 off, so you pay $31.50.

How do I find the discount percentage from two prices?

Subtract the sale price from the original price, divide by the original price and multiply by 100. $120 marked down to $90 is (120 − 90) ÷ 120 × 100 = 25% off.

Is sales tax applied before or after the discount?

In the US, sales tax is charged on the discounted price, so take the discount first and then add tax.

How do I calculate 40% off quickly in my head?

Find 10% by moving the decimal one place left, multiply by 4, and subtract. For $65: 10% is $6.50, 40% is $26, so the price is $39.

Last reviewed October 17, 2026 · Calculations run in your browser; nothing you enter is sent to a server.