About the Discount Calculator
Tezmy's Discount Calculator tells you the real price of anything on sale. Enter the original price and the percentage off to see what you'll pay and how much you save. It also handles stacked deals like “an extra 10% off sale prices” (which is less than it sounds), and can add sales tax or VAT so you know the final amount at the till. Handy for shopping, sales, coupons and pricing your own products.
Updated October 2026
How to use the Discount Calculator
- 1Enter the original price.
- 2Enter the discount, like 20 for 20% off.
- 3Add an extra discount or tax if needed.
- 4Read the final price and how much you save.
How to calculate a discount
Multiply the price by the discount percentage and divide by 100 to get the saving, then subtract it. For 30% off 80: 80 × 30 ÷ 100 = 24 saved, so you pay 56. A quicker way: pay 70% of the price, so 80 × 0.7 = 56.
Stacked discounts aren't added together
“20% off, plus an extra 10% at the till” is not 30% off. The second discount comes off the already-reduced price: 100 becomes 80, and 10% off 80 is 72. That's a total of 28% off. The calculator applies stacked discounts in the correct order, so you always see the real price.
Adding sales tax or VAT
In many places, tax is added after the discount. Enter your local rate to see the final amount at the till. In countries where prices already include VAT, leave the tax at 0%. To add or remove VAT from any price, use the VAT Calculator. For a share of a total, use the Percentage Calculator, and for a bill with a tip use the Tip Calculator.
Smart shopping tips
- Compare the final price, not the percentage: 40% off an inflated price may cost more than 20% off elsewhere.
- Check the saving in money: 50% off something you didn't need isn't a saving.
- For business pricing, use the Profit Margin Calculator to make sure a sale still leaves a profit.
Features
- Price after any percent off
- Shows your savings
- Stacked discounts done correctly
- Optional sales tax or VAT
- Any currency
- Instant results
Frequently asked questions
How do I calculate a discount?
Multiply the price by the discount percentage and divide by 100 to get the savings, then subtract it from the price. For 25% off $80: 80 × 25 ÷ 100 = $20 saved, so you pay $60.
Is 20% off plus an extra 10% off the same as 30% off?
No. The extra 10% is taken off the already reduced price, so the total is 28% off. On $100 you'd pay $72, not $70.
Is tax added before or after the discount?
In most places sales tax or VAT is charged on the discounted price, which is how this calculator works.
How do I find the original price from a sale price?
Divide the sale price by (1 − discount ÷ 100). For example, if $60 is the price after 25% off, the original was 60 ÷ 0.75 = $80.
Can I use any currency?
Yes. Pick your currency symbol; the maths is the same for every currency.
How much is 20% off 50?
20% of 50 is 10, so the sale price is 40. Enter 50 and 20% to see this instantly for any price.
How do I work out what percentage off a price is?
Divide the saving by the original price and multiply by 100. From 80 down to 60 is a 20 saving, and 20 ÷ 80 × 100 = 25% off.
Does it work on my phone while shopping?
Yes. It's designed for phones: enter the tag price and the discount and see what you'll pay.
Can I enter a discount as an amount instead of a percent?
The calculator works with percentages. To find the percentage of a money-off deal, divide the amount off by the original price and multiply by 100.