Break-Even Calculator (Units)

Units sold so contribution margin covers fixed overhead for that horizon.

Overview

Use when marginal economics are stable enough to pretend one average SKU. Step-changing costs (new warehouse) need a fresh run when crossed.

When to use this calculator

Rule of thumb

You assumed one average price and variable cost. Product mix washes that simplicity away in real carts.

Terms used in this calculator

Net profit (quick model)
Revenue minus a lump sum of expenses you chose to lump for a planning pass—not audited net income.
Gross margin
Sales minus COGS as a percentage of revenue—nothing below gross profit counted here.

Calculator

Break-even units 412 units

Results are simplified estimates for educational purposes only and should not be treated as financial, accounting, legal, or tax advice. See our disclaimer for details.

Formula

Fixed costs ÷ (price per unit − variable cost per unit). Tool rounds up to whole units when margin positive.

Example calculation

Using the default example values from the JSON seed for this tool:

Fixed costs (period)
28000
Selling price per unit
120
Variable cost per unit
52

Result: 412 units (Break-even units)

How to interpret this result

Units required so contribution margin covers fixed costs for the period you chose.

Assumes one average price and variable cost per unit—mix changes the truth.

Step-fixed costs need a new run when you cross hiring or capacity thresholds.

Common mistakes

  • Negative or zero contribution margin per unit.
  • Allocating fixed costs to the wrong time window.
  • Ignoring MOQ or step costs in variable cost.

What to do next

If units look huge, revisit price, variable cost, or fixed cost inputs before cutting spend blindly.

How to improve this result

  • Lower fixed costs or increase contribution margin.
  • Increase price if value supports it.
  • Improve variable costs with better suppliers or packaging.

Recommended tools

FAQ

Negative margin?
Selling more never fixes negative unit contribution—fix price or variable cost first.
Include semi-variable costs?
Split into fixed + per-unit components honestly or results lie.
Does this cover corporate overhead?
Only fixed costs you loaded into the field—expand scope deliberately.
Compare to cash runway?
Break-even units ignore timing of receivables—cash modeling still matters.
Multiple SKUs?
Blend cautiously or run per-SKU tables when mix shifts.

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