How the calculator works
Monthly revenue is selling price multiplied by expected monthly sales. Variable costs are cost per sale multiplied by sales. Estimated gross profit subtracts those variable costs from revenue.
What this estimate leaves out
This is an estimate, not financial or tax advice. It does not automatically include payment-processing fees, platform fees, advertising, refunds, taxes, fixed expenses, or labor unless you include relevant variable costs in cost per sale. It is not net profit.
Frequently asked questions
Why gross profit instead of net profit?
Three inputs cannot account for every business expense. Gross profit is a more accurate label for this focused estimate.
Can cost per sale be zero?
Yes. Use zero when there is no direct cost that increases with each sale, while remembering that fixed and omitted expenses still matter.