TallyKnot

Discount Calculator

See the real price after a discount and how much you save. It handles an extra discount on top ("30% + another 10% off"), sales tax, and can tell you the percentage off from the old and new price.

100% free No sign-up Private: stays in your browser
Price after discount
% off
%
%
Find the percentage off

You pay-
You save-
Total discount-
Price before tax-
Tax-

How to calculate a discount

A discount in percent is taken from the original price:

Saving = price × discount ÷ 100  and  Sale price = price − saving

A jacket of 120 at 25% off: 120 × 25 ÷ 100 = 30 saved, so you pay 90.

Stacked discounts are not added together

Shops often advertise "an extra 10% off sale prices". The second discount is taken from the already reduced price, so 30% + 10% is 37% off, not 40%. On a 200 item: 30% off gives 140, then 10% off 140 gives 126. With 40% off you would pay 120.

Is it really a good deal?

  • Compare the final price, not the percentage. 50% off an overpriced item can still cost more than the normal price elsewhere.
  • Check shipping and tax. A discount online can disappear once delivery is added.
  • Ask if you need it. The best saving is the thing you did not buy. If it was not on your list, wait a day.
  • Compare unit prices for groceries: price per kg or per litre, not per pack.

Frequently asked questions

Is 30% off plus 10% off the same as 40% off?

No. The second discount is taken from the already reduced price. 30% off and then 10% off is 37% off in total, not 40%. The calculator shows the real total discount.

How do I calculate a discount by hand?

Multiply the price by the percentage and divide by 100 to get the saving, then subtract it. 25% off 80: 80 × 25 ÷ 100 = 20, so you pay 60.

Is tax added before or after the discount?

Usually after: the discount lowers the price first, then sales tax or VAT is charged on the lower price. That is how this calculator works.

How do I find the percentage off between two prices?

Use the second calculator: enter the original and the sale price. It divides the saving by the original price. For example 120 down to 90 is a saving of 30, which is 25% off.

TallyKnot Cashbook

Track your expenses every day, for free

A calculator gives you one answer. A cashbook shows you the whole picture: write down cash in and cash out, see where the money goes in charts and on a calendar, and share a ledger with your family, team or friends.

  • Use it right in your browser, no sign-up
  • With a free account: shared ledgers in sync on Android and the web
  • Charts, calendar view and categories