Free Tools for Selling Digital Products

Small calculators that answer one question each, the way the platforms' own dashboards will not. Everything runs in your browser — no account, no email, no server.

What to charge so you keep $X

Reverse Fee Calculator

Start from the money you want to end up with and get the list price, including merchant-of-record fees that are charged on the tax-inclusive total, and the surcharges that stack on top.

Reverse or forward calculation
Lemon Squeezy, Paddle, Polar, Gumroad, Stripe presets
Tax-rate sensitivity for worldwide buyers

Why these exist

Every rate in these tools is read from the provider's own pricing page and dated, because fees change without announcement. If a number here is stale, the fields are editable — the arithmetic is the part that stays useful.