Discount Calculator
Work out the sale price and how much you save from a percentage discount.
Content updated July 1, 2026
Spotted a '30% off' tag and want the real price fast? This discount calculator turns an original price and a percentage off into the final sale price and the exact amount you save — no mental maths required.
It's handy while shopping the sales, comparing deals, or checking that a 'bargain' is as good as it looks.
The Discount formula
Saving = Price × (Discount% ÷ 100) · Sale price = Price − SavingPrice = the original price · Discount% = the percentage off. The saving is subtracted from the original to give the final sale price.
Worked example
A $120 jacket at 30% off saves 120 × 0.30 = $36, leaving a sale price of 120 − 36 = $84.
How to calculate a discount
Multiply the original price by the discount percentage divided by 100 to get the saving, then subtract it from the price. For example, 30% off $120 is $36 saved, leaving $84 to pay.
Stacked discounts don't add up the way they seem: 20% off then a further 10% off isn't 30% off — the second discount applies to the already-reduced price.
Frequently asked questions
▶How do I calculate the sale price?
Take the original price, subtract the discount amount (price × percent ÷ 100), and you have the sale price. This calculator does both steps instantly.
▶How do I work out the percentage discount from two prices?
Subtract the sale price from the original, divide by the original, and multiply by 100. A drop from $80 to $60 is (80 − 60) ÷ 80 × 100 = 25% off.
▶How do stacked or double discounts work?
They apply one after another, not added together. 20% off then a further 10% off is 0.8 × 0.9 = 0.72, so 28% off in total — not 30%.
▶How much do I save with a 30% discount?
Multiply the original price by 0.30. On a $120 item that's $36 saved, leaving $84 to pay. This calculator shows both the saving and the final price.
▶How do I add sales tax after a discount?
Work out the discounted price first, then apply the tax rate to that lower figure. Discounts are calculated before tax, so you're taxed on what you actually pay.
Learn more
Related calculators
Work out a percentage of a number, what percent one number is of another, and percentage increase or decrease.
Open calculator →Add sales tax or VAT to a price to see the tax amount and total you'll pay.
Open calculator →Split the bill and work out the tip per person in seconds — choose the tip percent and number of people.
Open calculator →Disclaimer: Discount Calculator results are estimates for general information and education only, and are not financial, tax, legal or medical advice. Verify important decisions with a qualified professional.