ProfitKit is a small collection of free calculators for people who sell online or work for themselves. Each tool answers one question, such as "what will I actually keep from this sale?" or "what should I charge per hour?". It shows the maths behind the answer so you can check it.
How we keep the numbers right
- Fee rates come from each platform's published fee pages and announcements, and are reviewed regularly. The date of the last review is shown on every calculator.
- Every formula is written out under the calculator, with a worked example you can reproduce by hand.
- Where fees vary by account or country, the calculator lets you type in your own rate instead of guessing.
Privacy by design
The calculators run entirely in your browser. The prices and costs you type are never sent to a server or stored. See the privacy policy for details.
Independence
ProfitKit is independent and is not affiliated with, endorsed by or sponsored by Etsy, Shopify or Amazon. All trademarks belong to their owners.
Found an out-of-date fee or a bug? Please tell us on the contact page.