About SellerMaths

What this site does

The main calculator handles the common PayPal fee question. The other tools split out the cases that need different fields: international payments, invoices and profit, exchange rates, instant transfers, Pay Later schedules, manual tax math, and donation or approved-charity fees.

• Receive payment estimates seller-side PayPal fees and net received amount.
• Reverse calculator estimates the gross amount to charge for a target net amount.
• International calculator supports business receiving and personal send modes only where the fee information is clear enough to calculate.
• Invoice calculator combines PayPal fee, costs, tax input, profit, and margin.
• Exchange-rate calculator compares a manual PayPal rate or editable spread estimate with a market rate.
• Instant-transfer calculator uses automatic withdrawal rules only for supported methods and leaves unsupported cases to manual input.
• Pay Later, tax, and donation pages are separate tools because their intent and formulas differ from the main fee calculator.

What this site does not do

The site does not connect to your PayPal account, read private transaction data, choose tax rates for you, or guarantee the live rate shown at checkout. It works from public PayPal fee pages and the values you enter.

Why the calculators are separated

A seller checking a Goods & Services fee needs different inputs from someone pricing an invoice, comparing a PayPal exchange rate, or planning Pay Later payments. That is why the tools are separate instead of one crowded form.

FAQ