Monu Tools

Discount Calculator

Calculate the final price after a percentage discount, or find the discount percentage from the original and sale price.

How to use the Discount

  1. 01

    Pick whether you know the discount percentage or the sale price.

  2. 02

    Enter the original price and the percentage, or the sale price.

  3. 03

    Read the final price and how much you save.

What the calculator does

A discount calculator for sales and special offers. Enter a price and a percentage to see the final price and how much you save, or compare an original and a sale price to find the percentage off.

The two modes answer the two questions shoppers actually have: what will I pay after this discount, and is the deal advertised really as big as it claims?

How the discount is calculated

To apply a percentage discount, the original price is multiplied by the percentage and divided by 100 to get the saving, which is then subtracted from the original for the final price.

Finding the percentage from two prices

To find the percentage from two prices, the calculator subtracts the sale price from the original, divides by the original and multiplies by 100. That tells you the true discount on a 'was X, now Y' label.

Watch out for stacked discounts

Stacked discounts are a common trap: a 20 percent then 10 percent offer is not 30 percent off, because the second discount applies to the already-reduced price, giving 28 percent in total. Apply them one after another, not by adding.

VAT and privacy

It works on the price you enter, so if that price already includes VAT the result includes VAT too, since a percentage discount applies the same way to gross and net prices. Everything runs in your browser.

Frequently asked questions

How do I calculate a percentage discount?

Multiply the original price by the percentage and divide by 100 to get the amount saved, then subtract it from the original price for the final price.

How do I find the discount percentage?

Subtract the sale price from the original price, divide by the original price and multiply by 100. The from-two-prices mode does this for you.

Does it include tax?

It works on the price you enter. If that price already includes VAT, the result includes VAT too, since a percentage discount applies the same way to gross or net prices.

How do stacked discounts work?

They multiply, not add. A 20 percent then 10 percent discount leaves 0.8 times 0.9, which is 72 percent of the price, so a 28 percent total saving, not 30.

Can I find the original price from the sale price?

Yes. If you know the sale price and the percentage off, divide the sale price by (1 minus the percentage as a decimal). A price after 20 percent off is the sale price divided by 0.8.

Embed this tool

Add this tool to your own website. Copy the snippet below; it stays up to date automatically.

<iframe src="https://monu.tools/embed/en/rabattrechner" width="100%" height="640" style="border:1px solid #e5e5e5;border-radius:12px;max-width:680px" loading="lazy" title="Monu Tools"></iframe>

Related tools