Use this calculator to estimate break even calculator from your own assumptions. The calculation runs locally in your browser, and the formula, example, scope, and source are visible below.
How to use this calculator
- Fixed costs per period (currency, required, >=0): enter the value for the same scenario and period as the other inputs.
- Selling price per unit (currency, required, >0): enter the value for the same scenario and period as the other inputs.
- Variable cost per unit (currency, required, >=0): enter the value for the same scenario and period as the other inputs.
- Optional target profit per period (currency, default 0): enter the value for the same scenario and period as the other inputs.
- Replace the example values with values from one consistent scenario.
- Select Calculate and review the primary and supporting results.
- Change one assumption at a time when comparing scenarios, then verify material decisions against the governing source or a qualified professional.
Formula and method
contribution_per_unit = selling_price - variable_cost
break_even_units = fixed_costs / contribution_per_unit
break_even_units_min = ceil(break_even_units)
break_even_revenue = break_even_units * selling_price
target_units = (fixed_costs + target_profit) / contribution_per_unit
target_units_min = ceil(target_units)
The implementation uses the audited A2 — Break-even / Target Price method. Intermediate values retain calculation precision; the interface formats values only for display unless the formula itself specifies a rounding rule.
Worked example
Inputs: Fixed costs=12000; Price=50; Variable cost=30; Target profit=4000
Result: Contribution=$20.00/unit; Break-even=600 units; Revenue=$30,000.00; Target-profit volume=800 units
This is the baseline audited scenario used to check that the page, formula, and displayed result remain aligned.
How to interpret the result
The calculator reports Contribution/unit; break-even units; minimum whole units; break-even revenue; target-profit units. Treat the output as a scenario estimate: it changes when the entered scope, time period, fee basis, or cost definition changes. It does not establish a universal benchmark or guarantee a business outcome.
Assumptions and limitations
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The result is limited to the inputs and A2 — Break-even / Target Price logic shown on this page.
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Results are informational planning estimates, not accounting, tax, legal, employment, valuation, or investment advice.
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Values are processed in the browser and are not submitted to an application server.
Common mistakes
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Price<=variable cost.
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price=0.
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negative costs.
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Rounding intermediate values before completing the formula can change the final result.
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A worked example is not a default recommendation; replace every assumption that does not match your case.
Frequently asked questions
What is the formula for Break-Even?
The calculation applies this audited method: contribution_per_unit = selling_price - variable_cost break_even_units = fixed_costs / contribution_per_unit break_even_units_min = ceil(break_even_units) break_even_revenue = break_even_units * selling_price target_units = (fixed_costs + target_profit) / contribution_per_unit target_units_min = ceil(target_units) Display rounding is applied after the calculation rather than to intermediate values unless the rule explicitly requires it.
What inputs do I need for the Break-Even Calculator?
Use the same period and units for these inputs: Fixed costs per period (currency, required, >=0); Selling price per unit (currency, required, >0); Variable cost per unit (currency, required, >=0); Optional target profit per period (currency, default 0). Keep optional assumptions at their example values only when those values match your scenario.
How should I interpret the result?
Read Contribution/unit; break-even units; minimum whole units; break-even revenue; target-profit units as a planning estimate for the assumptions entered. Compare scenarios using the same scope and period; the calculator does not establish a universal target or guarantee an outcome.
What are the most common mistakes in this calculation?
For break even calculator, keep the input definitions consistent and review these boundary conditions: Price<=variable cost; price=0; negative costs.
How this calculator was created and tested
- Formula basis: the public formula is generated from the audited implementation specification for this calculator, not inferred from a search snippet or an AI answer.
- Validation coverage: 2 of 2 release test vectors are marked Audited for this calculator. The suite covers a normal scenario plus boundary or invalid-input behavior where defined.
- Regression behavior: build checks compare expected outputs, validation states, route integrity, structured data, internal links, and release blockers before publication.
- Automation and AI: automation or AI may assist drafting, organization, and regression work, but it is not treated as an authoritative source and does not override the audited formula, official rate registry, or release blockers.
- Editorial responsibility: MIASIN S.R.O. controls publication, source policy, corrections, and release decisions. No named individual expert review is claimed unless a page explicitly identifies one.
Read the full Methodology, Editorial Standards, and Corrections Policy.
Sources and freshness
Sources are ordered by authority: government or official sources first, then first-party platform sources, educational references, and finally supporting industry references.
- Government / official source: Internal Revenue Service
- Government / official source: U.S. Small Business Administration
- Educational reference: OpenStax
- Educational reference: OpenStax
Last reviewed: September 22, 2026
Source set reviewed: September 22, 2026
Next scheduled review: September 22, 2027
Review cadence: Annual