A unit-economics scenario. It excludes taxes, capacity limits, changing prices, and step-fixed costs unless you include them in your inputs.
Calculation details
Planning estimate only. Platform fees, taxes, payment costs, and policies can change; verify current terms before pricing.
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Use this result
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What does this calculator estimate?
A break-even units calculator finds how many units you must sell to cover costs — or to hit a target profit. Enter fixed costs, price, variable cost, and optional target profit.
- Break-even = fixed ÷ (price − variable cost)
- Contribution margin = price − variable cost
- Above break-even, each sale is pure contribution to profit
What break-even tells you
Break-even is the sales volume where revenue exactly covers costs — the minimum viable number of units. Every sale past that point contributes directly to profit (after variable costs). It's a core number for pricing and sales goals.
Limitations to watch for
The model assumes fixed costs stay fixed and variable costs stay constant per unit — real costs step and scale. It's a single-product analysis; multi-product businesses need weighted margins. Price changes shift the break-even point.
How to use it in practice
Separate your fixed costs (rent, salaries) from per-unit costs (materials, shipping). Compute the break-even, then set a target profit to see the real sales goal. Re-run whenever price or costs change.
- Enter total fixed costs.
- Enter the price and variable cost per unit.
- Optionally enter a target profit; the tool shows units needed.
How this calculator works
Formula
Break-even units = fixed costs ÷ (price − variable cost per unit). With a target profit: (fixed costs + target profit) ÷ contribution margin. Contribution margin = price − variable cost.
Worked example
Fixed costs of $10,000, a $50 price, and $30 variable cost: contribution = $20, so break-even = 10,000 ÷ 20 = 500 units.
Assumptions to verify
- Fixed and variable costs are accurately separated.
- The unit price is constant.
- All units produced are sold at that price.
Frequently asked questions
What is break-even?
The sales volume where revenue equals costs — no profit, no loss. After it, every unit sold adds profit.
How do I calculate it?
Divide fixed costs by the contribution margin (price − variable cost). $10,000 ÷ ($50 − $30) = 500 units.
What is the contribution margin?
Price minus variable cost — the amount each sale contributes to covering fixed costs and building profit.
How do I calculate units for a target profit?
Add the target profit to fixed costs, then divide by the contribution margin.
What if my price is below variable cost?
You lose money on every sale — no volume fixes that. Raise the price or cut the variable cost.
Do fixed costs stay constant?
Only within a range — at higher volumes you may need more space, staff, or equipment, stepping fixed costs up.
How does this help pricing?
It shows the minimum sales needed at each price point, letting you test whether a price is viable.
Cite this tool
BoringToolsKit. “Break-Even Units Calculator.” boringtoolskit.com/break-even-units-calculator/ (reviewed 2026-08-25). Free to reference in articles, syllabi, and answer posts with a link.
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