Is the margin calculator free?
Yes. It is completely free to use, with no signup, no account, and no paywall.
Can I use it on my phone?
Yes. The page works in any modern mobile or desktop browser, with nothing to install, so you can run a quick calculation wherever you are.
Does it stay local?
Yes. The numbers you enter are processed entirely in your browser and never leave your device.
I want a 40% margin. What markup does that mean?
A 66.7% markup. The conversion is markup = margin / (1 - margin), so 0.4 / 0.6 = 0.667. A 60 cost has to be priced at 100 to yield a 40% margin, and marking that same 60 up by 40% would give you 84, which is only a 28.6% margin.
Why can margin never exceed 100%?
Because it is profit as a fraction of the selling price, and profit can never exceed the price it is a part of. Markup uses cost as the denominator instead, and profit can be many multiples of cost, which is why a 500% markup is possible and a 500% margin is not.
Does the margin include PayPal or Stripe fees?
Only if you build them into the cost field. The tool computes gross margin from the two numbers you give it. A 2.9% plus 0.30 processor fee on a 100 sale is 3.20, so adding that to a 40 cost drops the margin from 60% to 56.8%.
Is this gross margin or net margin?
Gross. It compares selling price to the direct cost of the unit and ignores rent, salaries, marketing, and every other operating expense. Net margin is a whole-business figure and this tool does not attempt it.
How do I set a price from a target margin?
Divide the cost by 1 minus the target margin as a decimal. For a 60 cost and a 35% target, that is 60 / 0.65 = 92.31. Enter that price back into the tool to confirm the margin line reads 35%.