Break-Even Calculator

Translate fixed costs into a whole-unit sales target. See contribution per sale and the revenue needed at the break-even point.

Free to useCalculated in your browserv0.2.1 · Method documented September 12, 2026

Your inputs

Changes update automatically
Saved only when you choose; never uploaded
Save these inputs as a project

Optional, unencrypted storage in this browser only. Do not save secrets on a shared device. Nothing is saved automatically.

My workspace →

Know the limits. The model requires positive contribution per unit. It assumes constant prices and costs, all units sold, and matching time periods.

How it works

Variable cost should include all expenses that rise with each sale. The result rounds up because a partial unit cannot cover the remaining cost when only whole items are sold.

Contribution = unit price − unit variable cost
Break-even units = ceil(fixed costs ÷ contribution)
Break-even revenue = whole units × unit price

Try the example

The starter inputs above produce:

Units to break even: 42

Change the inputs to match your own situation. The result is an estimate or text transformation, not a substitute for reviewing your source data.

A few useful details

Why does the result round up?

With $500 fixed costs and $12 contribution per unit, 41 units cover only $492. You need 42 whole units.

What counts as a fixed cost?

Use costs that do not change with sales volume over the period you are modeling, such as a planned monthly software subscription.

Do I need an account?

No. This release runs without an account, API key or payment. Saving a favorite stores only the tool’s identifier in this browser, not your inputs.