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Discount Calculator

Find the sale price and how much you save with a discount.

$
% off
% off

For example an extra 10% off sale prices.

%

You pay

–

You save
Total discount
Sale price before tax
Tax

Results are estimates for general information only and are not financial advice. Check important figures with a qualified professional or your lender. Read our disclaimer.

When to use it

Use this calculator when shopping in a sale to see the real price you will pay and how much you save. It handles a single discount, a second discount on top (such as an extra 10% off sale items), and sales tax, so the final number matches the checkout.

How to use it

  1. Choose your Currency.
  2. Enter the Original price.
  3. Enter the Discount as a percentage, or tap a quick option such as 20%, 30% or 50%.
  4. Optionally, enter an Extra discount on top, for example a voucher on sale prices.
  5. Optionally, enter your Sales tax rate.
  6. Read You pay, You save, Total discount, Sale price before tax and Tax.

Worked example

A coat costs $80 and is 25% off. You pay $60 and save $20.

At the till there is an extra 10% off sale items, and sales tax is 8%. Enter 10 in the extra discount box and 8 in sales tax. The extra 10% is taken from $60, giving $54 before tax. Tax adds $4.32, so you pay $58.32 instead of $86.40, the full price with tax. You save $26, and the total discount is 32.5%.

Using it with tax-free prices

If you shop somewhere prices already include tax, such as most of Europe, leave the sales tax box empty. The You pay figure is then the price at the till.

Tips

  • Compare deals properly. “Buy one, get one half price” is the same as 25% off two items. Work out the price per item to compare it with other offers.
  • Check the original price. Some shops raise prices before a sale. If you can, check what the item cost a few weeks earlier.
  • Set a budget first. Use the calculator to check the final price with tax before you reach the checkout.
  • Watch for shipping costs online. A big discount can disappear once delivery is added.

Common mistakes

  • Adding stacked discounts together. Two discounts are applied one after another, so 50% off plus 20% off is 60% off, not 70%.
  • Forgetting tax. In places where tax is added at the till, the shelf price is not the final price.
  • Treating savings as money earned. Saving $20 on something you did not need still costs $60.

Quick reference

Common prices after discount on $100: 10% off is $90, 20% off is $80, 25% off is $75, 40% off is $60, and 70% off is $30.

Frequently asked questions

Is 25% off plus an extra 10% off the same as 35% off?

No. The extra 10% is taken off the already reduced price, so the total discount is 32.5%, not 35%. The calculator shows the real total discount for you.

How do I work out a discount in my head?

Find 10% by moving the decimal point one place left, then multiply. For 30% off $80, 10% is $8, so 30% is $24 and you pay $56.

Is the tax added before or after the discount?

In most places tax is charged on the price you actually pay, after the discount. That is how this calculator works.

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. For example, $80 down to $60 is $20 ÷ $80 = 25% off. You can also use the Percentage Calculator for this.

Why does "You save" not include the tax?

The saving compares the original price and the sale price before tax. Tax is shown on its own line, so you can see exactly what you are paying for.

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