Break-even Calculator
Estimate the whole units needed to cover fixed costs using a selling price and variable cost per unit.
Loading tool…
How to use Break-even Calculator
Test whether a unit-based pricing model can cover its fixed costs. The calculator reports contribution per unit, the theoretical break-even quantity, and the rounded-up whole-unit sales target.
- Enter fixed costs for a consistent period.
- Enter the selling price and variable cost per unit in the same currency.
- Calculate the minimum whole units and revenue needed in this simplified model.
Good to know
- Assumes one product, constant selling price, constant variable cost per unit, and fixed costs that do not change with volume.
- A positive contribution per unit is required. Whole-unit counts beyond JavaScript safe integer precision are rejected.
- Numbers use JavaScript floating-point arithmetic. Inputs are limited to 1,000 characters and a magnitude of 1 quadrillion. Results are rounded for display.
- These are arithmetic estimates, not financial or tax advice. No currency conversion, fees, or legally applicable tax rules are included.
Common questions
Why is the whole-unit target rounded up?
A fractional unit cannot cover the remaining cost when a product is sold only in whole units. The target therefore rounds up to the first whole-unit quantity that covers costs.
What if variable cost is equal to the selling price?
Each sale contributes nothing toward fixed costs, so this model cannot produce a finite break-even volume.
Keep going with related tools
All calculators →Profit Margin Calculator
Calculate gross profit and gross margin from revenue and cost, including loss-making sales.
CalculatorsMarkup Calculator
Turn a cost and a markup rate into a selling price, profit amount, and equivalent gross margin.
CalculatorsPercentage Calculator
Calculate a percentage of any amount, then see the totals after adding or subtracting that percentage.
CalculatorsFixed Sales Bundle Break-even Planner
Find whole repeating product bundles that cover fixed costs and a declared target profit.
CalculatorsLearning Curve Production Planner
Build a unit-by-unit effort schedule under Wright or Crawford learning assumptions and total a production batch.
CalculatorsSubscription Unit Economics Calculator
Compare acquisition cost, modeled gross-profit lifetime value, and contribution payback.