Discount Calculator

Calculate a sale price, the discount amount and any tax.

Inputs stay on your device No sign-up Free to use
How this works

The tool runs in this browser. Your file or text is not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.

Privacy details

Calculate controls

Showing an example. Edit to see your own.

25%
10%

Leave at 0 when tax does not apply.

Turn this off when tax is calculated on the original price instead.

Rounding

Processed in your browser. Your inputs stay on this device.

How to use Discount Calculator

  1. Enter the original price and the discount percentage.
  2. Add a tax or VAT percentage if it applies.
  3. Choose whether tax applies after the discount.
  4. The final price, the saving and the tax update as you change the fields.

Example: Discount Calculator

Work out a 25 percent discount on 100 with 10 percent tax added after the discount.

You add
Original price 100, discount percentage 25, tax percentage 10, apply tax after the discount on, rounding two decimals.
You get
Price after discount 75.00, tax amount 7.50, final price 82.50 and a saving of 25.00.

Options

Apply tax after the discount
On, tax is charged on the discounted price; off, on the original price. The same item at 8.5% comes to 217.00 or 221.25.
Tax or VAT percentage
Leave it at 0 when no tax applies. It accepts any value from 0 to 100 percent.
Rounding
Two decimal places for money, or whole numbers where the currency has no minor unit.

Supported inputs and limits

One percentage discount per run, so a stacked promotion needs two runs. The price can go up to 1,000,000,000,000 and both percentages stay between 0 and 100. Negative prices are refused. There is no currency conversion, shipping, per-item fee or money-off coupon field. Rounding is half up on the figures shown, so a store that rounds each line of a receipt can produce a slightly different total.

Where your input is processed

This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.

Why two 20% discounts are not 40% off

Each discount is taken from what remains, not from the original price. A 250 item loses 50 in the first round and 40 in the second, because the second 20% is charged on 200. The customer pays 160, which is 64% of 250, so the total reduction is 36%.

Questions about Discount Calculator

Should tax be worked out before or after the discount?

The default applies tax to the discounted price. Rules differ by place, so check how the tax is worked out on your receipt, and switch the checkbox off when the base is the original price.

Can I stack two discounts?

Not in one run. Two 20% discounts on a 250 item leave 160, which is 36% off and not 40%.

Why is the amount saved the same as the discount amount?

Savings counts the discount only. Tax changes the final price but is not money you keep.

Does it handle a fixed money-off coupon?

No, percentages only. Subtract a fixed coupon from the calculated price yourself.

Project manager: Tony Hines · Content updated 29 September 2026 · Report a problem