How to use the Break Even Calculator.
Define fixed costs and variable cost per unit for the same period. If contribution per unit is zero or negative, there is no finite break even quantity under those assumptions.
Make the workflow fit your task.
Use fixed costs for a defined period and the selling price and variable cost per unit. Calculate contribution per unit, then divide fixed costs by it. Round up when whole units are required and verify revenue against modeled costs at the threshold.
- What you provide
- Fixed costs, price and variable cost.
- What you get
- Break-even units and revenue with formula shown.
See the input and the result.
Illustrative input and output · a teaching example, not a live WebAct run
Example input
Monthly fixed costs USD 1,200; price USD 30 per unit; variable cost USD 18 per unit.
Completed example
Contribution per unit: USD 12. Break even: 1,200 ÷ 12 = 100 units per month. At 100 units, revenue and modeled total cost both equal USD 3,000.
Load this input into the prompt, then copy it to WebAct to try the task. Your result may differ from the illustration.
Decisions and troubleshooting.
What if variable cost equals or exceeds the selling price?
The contribution is zero or negative, so this simple model has no finite positive break-even quantity.
Why does the calculated threshold understate the actual sales needed?
Some costs, product mix effects or capacity changes may be omitted. State the model boundary and review those assumptions.
Try it with your own source.
Replace the example with your material in the task prompt. Keep the requirements you need, then copy the task into WebAct.
Customize and copy the task ↑