Break-Even & Unit Economics Calculator

Find out exactly how many units (or customers) you need to sell to cover your costs. Get your contribution margin, break-even point in units and revenue, and your margin of safety.

Your numbers

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Results

Break-even point
Contribution margin / unit
Contribution margin %
Margin of safety
Profit at current volume
Disclaimer: This calculator is provided for general educational and informational purposes only. It is not financial, investment, accounting, tax, or legal advice, and results are estimates based on the figures you enter. Cap-table, SAFE, and dilution outcomes depend on specific legal terms — always confirm with your accountant, lawyer, or a qualified advisor before making decisions.
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Frequently asked questions

How do you calculate the break-even point?

Break-even units = fixed costs ÷ contribution margin per unit, where contribution margin = price − variable cost per unit. Multiply by price to get break-even revenue.

What is contribution margin?

Contribution margin is the amount each sale contributes toward fixed costs and profit, after covering its own variable cost. It equals price minus variable cost per unit.

What is margin of safety?

Margin of safety is how far sales can drop before you fall below break-even, expressed as a percentage of current sales: (current units − break-even units) ÷ current units.

Why does lowering variable cost help more than cutting fixed cost?

Lowering variable cost increases the contribution margin on every unit, which reduces the number of units needed to cover fixed costs. It compounds across all sales, not just one line item.