NexaCalc

Business Calculator

Break-Even Calculator

Calculate break-even units, break-even revenue, target-profit volume and weighted multi-product mix scenarios.

Last reviewed: June 28, 2026Business Phase 1 method set v1.0.0: profit, margin, markup, discount, indirect-tax, invoice and break-even formulas

Business calculator

Break-Even Calculator

Changing currency changes display only. It does not convert amounts or fetch exchange rates.

Mode

Single-product inputs

Enter your values and choose Calculate to show the result.

What the Break-Even Calculator does

Break-Even Calculator focuses on fixed cost and contribution-margin break-even planning. It keeps the calculation local, deterministic and based only on the values you enter.

The result is designed for planning and checking arithmetic, not for accounting entries, tax filing or pricing advice.

How to use the Break-Even Calculator

Enter the values you already know, choose the mode where the page provides one, then calculate. Change the display currency only when you want a different symbol; no currency conversion is performed.

Use reset before starting a separate scenario so stale assumptions do not remain in the form.

Formula

Break-even units = fixed costs / (selling price - variable cost per unit). Break-even revenue = fixed costs / contribution margin ratio.

Variables

The calculator uses these user-entered variables and derived values:

  • Fixed costs
  • Selling price
  • Variable cost per unit
  • Contribution margin
  • Target profit
  • Sales mix

Calculation order

NexaCalc applies the formula in a fixed order so the result is reproducible:

  • Calculate contribution margin.
  • Calculate contribution margin ratio.
  • Divide fixed costs by contribution margin.
  • Add target profit to fixed costs for target-profit volume.
  • Use weighted contribution for multi-product mix.

Result interpretation

The headline result is the main planning number for this specific tool. Supporting rows show the intermediate values that explain how the headline was produced.

Negative profit, negative cash position, or an invalid contribution margin is shown directly instead of being hidden by color or rounded away.

Worked example

Example: fixed costs 10,000, price 50 and variable cost 30 gives 20 contribution margin. Break-even is 500 units and 25,000 revenue. A 5,000 target profit needs 750 units.

Common mistakes

The most common errors are denominator mistakes, tax-basis assumptions and mixing planning math with official compliance rules.

  • Using gross margin instead of contribution margin.
  • Leaving variable selling fees out of variable cost.
  • Assuming fixed costs stay fixed outside the relevant range.
  • Changing product mix without recalculating weighted contribution.

Limitations

The calculator deliberately avoids decisions that require professional judgment, current statutory rates or business-specific records.

  • No demand forecast is made.
  • Fixed and variable cost behavior is assumed from entered data.
  • Multi-product results assume the entered sales mix remains constant.
  • Whole-unit rounding can vary by operational constraints.

Related-calculator comparison

Break-Even Calculator is part of the Business Phase 1 cluster. Related calculators are linked below so margin, markup, discount, tax, invoice and break-even scenarios can stay separate.

Rounding and currency display

The calculation keeps Decimal.js precision internally and rounds for display and CSV export. Most currencies display with two decimals, while zero-decimal currency formatting follows the shared NexaCalc finance formatter.

Changing currency changes labels and formatting only. It does not convert between currencies.

Privacy and data handling

Inputs are calculated in the browser session. NexaCalc does not upload invoice rows, tax rates, customer names, supplier names or pricing assumptions from these calculators.

Frequently asked questions

What is the Break-Even Calculator?

It is a deterministic NexaCalc tool for fixed cost and contribution-margin break-even planning.

Does it use live tax rates or market prices?

No. All rates, costs, prices and tax treatments are entered by the user.

Does changing currency convert the numbers?

No. Currency selection changes formatting only and does not perform exchange-rate conversion.

Can this replace accounting or tax advice?

No. The page is a mathematical planning calculator, not accounting, tax, legal or pricing advice.

How are percentages handled?

Percentages are converted to decimal rates internally, and the calculator displays rounded percentages for readability.

Why can margin and markup differ?

Margin uses selling price as the denominator, while markup uses cost as the denominator.

How does NexaCalc round money?

The engine uses Decimal.js internally and rounds only display, table and CSV values.

Are negative results allowed?

Yes. A loss, negative VAT position or negative margin is shown when the entered numbers produce one.

Can I export the result?

The calculator supports copying, printing and sharing the result. Invoice and row-based pages also provide CSV exports.

Where should I go next?

Use the related calculators near the end of the page when you need a different business question than Break-Even Calculator answers.

References

  • OpenStax, Principles of Accounting Volume 2, section 3.2 on break-even point in units and dollars. Source.
  • OpenStax, Principles of Accounting Volume 2, section 3.1 on contribution margin. Source.
  • New York State Department of Taxation and Finance, Taxable Receipt bulletin TB-ST-860, updated March 16, 2026. Source.
  • OECD, International VAT/GST Guidelines, official publication page. Source.
  • European Commission, Value Added Tax overview, Taxation and Customs Union. Source.

Business Phase 1 references and formula families reviewed on June 28, 2026.

Business disclaimer

Break-even results depend on the entered price, cost, sales mix and fixed-cost assumptions. Actual results may differ.