Set up a useful comparison
Fixed costs remain the same within the period and capacity being modelled. Variable costs change with each additional unit. If your selling price does not exceed variable cost, selling more units cannot cover fixed costs; the calculator rejects that scenario.
Worked example
With fixed costs of 2,000, a selling price of 25 and variable cost of 10, each sale contributes 15. Covering fixed costs requires 134 whole units. Earning an additional 1,000 requires 200 units, assuming every unit sells.
Make the result your own
Replace the example figures, then change one assumption at a time. Read the breakdown as well as the headline answer. The calculator shows its formula and lets you copy or share the result. Shared scenario links include the inputs you choose.
No default is a current market price or an official rate. Calculations do not account for costs or physical effects that are not represented by an input. Check the underlying bill, contract or equipment specification before making a consequential decision.