Inputs

Results update as you type. The link in the address bar keeps the inputs so you can share it.

Rent, salaries, software. Costs that do not change with sales.

Materials, shipping, payment fees per sale.

What this means

  • Each sale contributes $30.00 toward $12,000.00 in fixed costs, so you break even at 400 units.
  • To earn $5,000.00 profit you need 567 units.

What if

Raise the price $5 Sell at $55.00. Break-even drops by 57 units.
Cut variable cost $2 Cheaper materials or shipping. Break-even drops by 25 units.

About this calculator

What this calculator does

It finds the sales volume where revenue equals total costs. Each unit sold covers its own variable cost and contributes the rest toward fixed costs.

How it is calculated

contribution per unit = price - variable cost

break-even units = fixed costs / contribution per unit, rounded up

units for a target = (fixed costs + target profit) / contribution per unit

How to read the result

Below the break-even units you lose money. Each unit above it adds the contribution per unit to profit.

Sources and method

Standard arithmetic with no outside data. The formula is shown under How it is calculated, and unit tests check worked examples, including edge cases.

This page uses arithmetic only, with no outside data.

Questions

What is a fixed cost?

A cost that stays the same whatever you sell in the period, such as rent.

What is contribution margin?

Price minus variable cost per unit. It is what each sale contributes toward fixed costs and profit.

Why round up?

You cannot sell part of a unit, and rounding down would leave you just short.

Does it include taxes?

No. It is a pre-tax operating view.