Boneyard Tools

Break-even Units Calculator

Work out exactly how many units you need to sell to cover your costs. Enter your fixed costs, selling price and variable cost per unit to get the break-even quantity, then add a target profit or your actual sales to see the units needed for that profit and your margin of safety.

How to use the break-even units calculator

  1. Enter your total fixed costs for the period and the price and variable cost for one unit.
  2. Read the break-even units and revenue, plus the contribution margin per unit.
  3. Optionally add a target profit and your actual units sold to see units for that profit and the margin of safety.

Examples

A product with a 20 per unit margin

Fixed costs 10,000; price 50; variable cost 30; target profit 5,000; sold 800
Contribution margin 20/unit, break-even 500 units (25,000 revenue), 750 units for the profit, margin of safety 300 units (37.5%)

Frequently asked questions

How do I calculate the break-even point in units?

Divide total fixed costs by the contribution margin per unit, where the contribution margin is the selling price minus the variable cost per unit. Because you cannot sell part of a unit and still cover costs, the result is rounded up to the next whole unit.

What is the margin of safety?

The margin of safety is how far your actual sales sit above the break-even point. In units it is actual units sold minus break-even units; as a percentage it is that gap divided by actual units sold. A higher margin of safety means sales can fall further before you start making a loss.

How many units do I need to sell to reach a target profit?

Add your target profit to your fixed costs, then divide by the contribution margin per unit and round up. The calculator does this for you when you enter a target profit, so you can see the sales volume a specific profit goal requires.

How is this different from the break-even calculator?

The break-even calculator gives the core break-even point in units and revenue. This break-even units calculator adds two extras on top: the units needed to hit a target profit, and the margin of safety against your actual or planned sales. Use that one for a quick answer and this one when you are planning profit goals or sizing your risk buffer.

Why does it fail when the price is below the variable cost?

If the price does not exceed the variable cost, every sale loses money before fixed costs are even considered. The contribution margin is zero or negative, so no number of units can ever break even and the calculator asks you to raise the price or cut the variable cost.

Is my data private?

Yes. Every figure is calculated in your browser as you type. Nothing you enter is sent to a server, stored, or shared, so your cost and pricing numbers stay on your device.

Related tools