About

Acalcia builds free, no-signup calculators for freelancers, 1099 contractors, online sellers, and creators — the money math that's surprisingly hard to find in one place: self-employment tax, take-home comparisons, marketplace fees, pricing, and invoicing.

Every tool runs entirely in your browser. We don't require an account, and the calculators don't send your numbers anywhere.

Who runs this

This site is built and maintained by Eylon Krause, an independent developer. Have a correction or a tool request? See the contact page — reader feedback shapes what we build next.

Our promise on accuracy

Tax and fee figures change. We label the tax year on every tax tool, cite official sources (IRS rates, platform fee schedules), and keep inputs editable so you can plug in current numbers. Still, these tools are estimates, not professional advice — see the disclaimer.