Tested tool guide
Tested browser tools
Checked August 16, 2026
What Break-Even Calculator does, with a checked example
Break-even analysis identifies where sales revenue equals total costs, leaving neither profit nor loss. Enter fixed costs, variable cost per unit, and selling price per unit to calculate the required unit volume and corresponding revenue. The calculation depends on contribution margin, which is the selling price minus variable cost for each unit. A frequent mistake is entering total variable costs instead of a per-unit amount, which can make the result meaningless.
Worked example
A concrete input and expected output from the current implementation.
Input
Fixed costs: $1,200
Variable cost per unit: $8
Selling price per unit: $20
->
Expected output
Contribution margin per unit: $12
Break-even point: 100 units
Break-even revenue: $2,000
Each unit contributes $20 - $8 = $12 toward fixed costs. Dividing $1,200 by $12 gives 100 units, whose $2,000 revenue equals $1,200 of fixed costs plus $800 of variable costs.