Free · Business planning

Break-Even Sales & Revenue Calculator

Find the sales quantity and revenue that cover fixed and variable costs.

  • Formula & worked example
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Calculator inputs

Enter the values you know

Results update as you type. Edit a result to calculate another value, or lock a value to keep it fixed.

Margin and markup
%
%
To break even
units
Result

Your calculation

Enter enough known values to calculate the blanks.

Use one currency for your figures. Mixed-currency conversions use rates captured October 5, 2026, rather than live exchange rates.

How to use this calculator

  1. Enter the values you know in the units shown. Leave unknown values blank.
  2. Results update automatically as you type. Edit a result to calculate another value, or lock a value to keep it fixed.
  3. Reset restores the starting fields. A worked example appears below.

Use the result with context

Results are estimates for planning and education. Confirm rates, taxes, fees, and legal requirements with the relevant institution or a qualified professional before making a financial decision.

Formula and method

Break-even quantity is fixed costs divided by selling price minus variable cost per unit. If you sell indivisible items, use the next whole unit when planning sales.

Break-even units = fixed costs ÷ (price − variable cost)

Worked example

Enter these known values and leave the other values blank.

Revenue per unit
50 USD
Cost per unit
20 USD
Fixed costs
3000 USD
Margin
60 %
Markup
150 %
You need to sell
100 units
With a revenue of
5000 USD

Assumptions and limitations

  • Inputs must satisfy the validation rules. Editing a result can recalculate an earlier input; lock values you want to keep fixed.
  • Currency conversions use the captured source rates from October 5, 2026; they are not live exchange rates.

Common questions

What does this break-even calculation tell me?

Break-even quantity is fixed costs divided by selling price minus variable cost per unit. If you sell indivisible items, use the next whole unit when planning sales.

Can I calculate a different unknown?

Yes. Clear that field and enter the other known values. The calculator uses the available inverse equations.

References

The calculation equations, inverse formulas, units, and input rules were imported from this source. Bookify provides the interface and equation solver.

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