Margin Calculator
Enter a positive cost and selling price.
Margin and markup are often confused — margin is profit as a share of what you sold it for; markup is profit as a share of what it cost you. They're always different numbers for the same sale (except at 0%).
Free margin and markup calculator that factors in a selling fee percentage — payment processor or marketplace commission — before computing your real margin. We checked calculator.net's margin calculator directly: it correctly shows both margin and markup side by side, but treats cost as a single number with no way to account for a percentage-based fee taken out of the sale.
How it works
- Enter your cost and selling price
- Add a selling fee percentage if a payment processor or marketplace takes a cut (e.g. Stripe, Etsy, Amazon)
- See the fee amount, net profit, margin, and markup — all after the fee is accounted for
Frequently asked questions
What's the difference between margin and markup?
Margin is profit as a percentage of what you sold it for (revenue). Markup is profit as a percentage of what it cost you. They're always different numbers for the same sale — a common source of pricing mistakes when the two get mixed up.
Why does this ask for a selling fee percentage?
If you sell through a marketplace or payment processor that takes a cut (a common real cost for online sellers), your actual margin is lower than a simple cost-vs-price calculation shows. We checked calculator.net's margin calculator directly and it has no field for this — you'd have to do the fee math yourself first.
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Update history
- 2026-09-03 Bounded numeric fields are now sliders instead of number inputs.
- 2026-09-01 Added: a cover image (a coin splitting into two labeled portions on a small scale, one visibly nibbled by a percentage-shaped bite mark) — used as the card thumbnail, social share image, and blog title image.
- 2026-09-01 Launched: margin calculator (no button) — margin and markup shown side by side, with an optional selling fee percentage (payment processor / marketplace commission) factored into the real net margin. Entirely client-side.