Break-Even Calculator

Find the theoretical and whole-unit break-even points.

Fixed costPrice per unitVariable cost per unit

Result

Formula

Contribution margin per unit = price − variable cost. Theoretical quantity Q = fixed cost ÷ contribution margin, and theoretical revenue = Q × price. Whole units needed = ceil(Q) taken from the exact fraction, with revenue = whole units × price.

Calculation

Data & privacy

Client-side computation

Your numbers are calculated in this browser.

Example

Example: fixed cost 100, price 10, and variable cost 4 give a contribution margin of 6, a theoretical quantity of 50/3 ≈ 16.666667, a theoretical revenue of 500/3 ≈ 166.67, and 17 whole units with revenue 170.

Use a decimal point (.) and up to six decimal places; do not enter commas, currency symbols, or exponents. Amounts use the same unit.

Results show up to six decimal places. Nonzero values that round to zero are shown as a range and cannot be copied as a number.

The theoretical quantity can be a fraction; the whole-units quantity is its exact fraction rounded up, so it is the smallest whole number that covers the fixed cost. Taxes, fees, and demand forecasts are not included.

Limits

Fixed cost, price, and variable cost are 0 to 1,000,000,000,000, and the price must be greater than the variable cost. Quantity and revenue results above 1,000,000,000,000 are rejected. Taxes, fees, multi-product allocation, and demand forecasts are not included.

Inputs

Result

Revenue and total cost

Σ Formula

Calculation

Formula