What will the platform actually keep?
Pick a platform, type an amount, and see the fee, the payout and the real effective rate. Switch to reverse mode when you know what you need to receive — the calculator works out what to charge, then verifies it to the cent.
Rates checked Oct 2026 — always confirm on the provider's official fee page. Fees are rounded to the nearest cent, the way the platforms round them.
Every platform, one calculator
On a $100 sale, the eight platforms below keep anywhere from $1.75 (Venmo) to $20.00 (Fiverr) — the spread is wide enough that guessing costs real money. Each calculator uses the platform's published US rates, checked Oct 2026.
Forward vs. reverse: which mode do you need?
Forward mode answers the question after a sale: "I charged $250 — how much lands in my account?" It subtracts each fee component and shows the effective rate, which is almost always higher than the headline rate because flat fees weigh more on small amounts.
Reverse mode answers the question before you quote: "I need $500 in hand — what do I invoice?" The math is charge = (target + flat fee) ÷ (1 − percentage). Simply adding the percentage on top does not work, because the platform then takes its cut of the larger amount too. FeeCalc runs the result back through the forward calculation and adjusts by cents until the payout matches your target exactly.
Why the effective rate matters
A rate like "2.99% + $0.49" sounds like roughly 3%, but on a $10 payment the real cost is 7.90% — the 49-cent flat fee does most of the damage. The smaller your typical payment, the more the flat fee dominates, and the more batching orders or raising minimums helps. Every result on this site shows the effective rate so you can compare platforms honestly at your own average ticket size.
Frequently asked questions
Are these rates current?
They are the providers' published US rates as of Oct 2026, and each calculator page shows its components. Rates change — always confirm on the provider's official fee page before you rely on a figure for a quote.
Why does the reverse calculator sometimes add a cent?
Because platforms round fees to the nearest cent. The exact algebraic answer often lands between cents, so FeeCalc rounds the charge, runs it forward, and nudges it by a cent when needed so your payout matches the target to the cent.
Do the calculators include taxes or currency conversion?
No. They cover the platform fee itself for US-dollar payments. Sales tax, VAT, and currency-conversion markups (commonly a few percent on cross-border payments) are separate and depend on the transaction.
Which platform is cheapest?
It depends on the amount and what you sell. The comparison page runs the same amount through all eight platforms side by side — try it with your typical order size rather than a round $100.