# Margin & markup

Canonical page: https://nepocore.com/tools/profit-margin/

Calculate gross profit, gross margin and markup from a unit cost and selling price. Keep the two percentages separate to avoid mixing their bases.

## How to use it

1. Enter the numbers, dates or units you want to compare.
2. Choose the calculation options and calculate.
3. Review the result together with the assumptions shown.

## Example

Compare a cost of 800 with a selling price of 1000: margin is 20% while markup is 25%.

## Limits and checks

This is gross profit before overheads and taxes. Markup is undefined when cost is zero; margin is undefined at zero selling price.

## Access and processing

Free to use without an account. Interactive processing requires JavaScript in a modern browser. Input is processed in the browser rather than sent to a processing server. Optional browser storage is not a synchronized account.


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