Break-even Calculator

About this tool

Anyone pricing a product or opening a shop needs one number first: how many units cover the costs. Rent and equipment stay fixed while materials and packaging scale with each unit, so splitting the two is what makes a break-even point computable.

With 48,000 in fixed cost, a price of 80 and a unit variable cost of 32, the unit contribution is 48 and break-even lands exactly at 1,000 units, or 80,000 in revenue. Adding a 20,000 profit target pushes the required volume to 1,417 units.

What it does

• Cost splitFixed and variable costs entered separately Every number shown here maps to a field on the form, so changing one value recomputes the rest. The units are printed next to each input, which saves most of the usual mistakes.
• Break-evenBreak-even volume rounded up to whole units The main figures sit at the top of the result panel and the breakdown sits below it, so you can read the conclusion first and audit the steps afterwards. Nothing you type leaves the browser.
• Target profitTarget profit converted into required volume All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
• Contribution ratioShows the contribution ratio Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
• Safety marginSafety margin from current volume The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
• BreakdownBreakdown lists every intermediate figure Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.

How to use it

1. Start by filling inenter total fixed cost The main figures sit at the top of the result panel and the breakdown sits below it, so you can read the conclusion first and audit the steps afterwards. Nothing you type leaves the browser.
2. Next, setenter unit variable cost All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
3. Then pressenter the selling price Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
4. Read theenter target profit and current volume The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
5. Finally, usepress Calculate and check the breakdown Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.

Things to keep in mind

• Price relationshipprice must exceed unit variable cost All arithmetic runs locally in the page. There is no request to a server, no account, and no saved history once the tab is closed. Use the example button if you want a set of values that is known to work.
• Zero targeta zero target profit is valid Intermediate quantities are kept in the detail table. When a total looks wrong, tracing back through those rows is much quicker than staring at the headline number alone.
• Below break-evensafety margin floors at zero below break-even The formula is written out in the notes rather than hidden behind a label, so you can check it against a spreadsheet or a textbook. Values are rounded only for display.
• Model limitsno step costs or product mix Inputs are validated before any calculation starts. Empty or impossible values produce a short explanation instead of a zero, a NaN, or a made-up answer.
• Roundingvolumes are rounded up, not rounded off Every number shown here maps to a field on the form, so changing one value recomputes the rest. The units are printed next to each input, which saves most of the usual mistakes.