# Discount Calculator

> Work out a final price after a discount, the percentage behind a price drop, or two discounts in a row.

Canonical: https://host-tools.com/tools/discount-calculator/

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## What does this tool do?

Three questions, one page: the final price after a discount, the discount behind two prices, and
what is left after two discounts applied one after the other.

## Two discounts are not added up

A 20 % discount followed by another 20 % is **not** 40 %. The second one is calculated on what was
left after the first:

```
100 → 20 % off → 80 → 20 % off → 64
```

That is 36 % off in total, and the difference from 40 % is exactly the mistake this page exists to
catch. The result shows the effective discount, so you can compare an offer against a simpler one.

## When it is not a discount

If the final price is higher than the original, the tool refuses to answer: that is a surcharge, and
calling it a discount would hide it. Percentages outside 0–100 and negative prices are rejected too,
each with a sentence saying what is wrong.

## Keep in mind

Money is not rounded to cents inside the engine — the result carries the exact figure and the page
shows two decimals, so a chain of calculations does not accumulate rounding errors. Everything runs
in your browser.