Free Business Calculators
Work out the fees and the net payout on online sales. Each business calculator shows the arithmetic clearly, runs in your browser, and needs no signup.
Last updated: November 2026
Payment and Marketplace Fee Calculators
Every sale made through a payment processor or a marketplace has a cost attached. These calculators show how much of a sale goes to fees and how much you keep, so you can price products and invoices with the real cost in mind.
PayPal Fee Calculator
See the fee on a PayPal payment and the net amount you receive, or work backwards to the amount to request.
Stripe Fee Calculator
Estimate Stripe processing fees on a card payment and see the net amount that reaches your account.
Etsy Fee Calculator
Break an Etsy sale into its seller fees and see what is left for you after them.
Which Business Calculator Should I Use?
| If you want to… | Use |
|---|---|
| See the fee and net amount on a PayPal payment | PayPal Fee Calculator |
| Estimate card processing fees on a Stripe payment | Stripe Fee Calculator |
| Add up Etsy seller fees on a sale | Etsy Fee Calculator |
| Split a price into net and tax before working out fees | VAT Calculator or GST Calculator |
| Take a percentage off a price | Discount Calculator |
How Seller Fees Work
A percentage plus a fixed amount
Many payment fees combine a percentage of the sale with a fixed charge per transaction. The fee on a sale of S is therefore (S × percentage) + fixed amount, and what you keep is S minus that fee. Because the fixed part does not shrink with the sale, it takes a bigger share of small sales than of large ones.
Why the order and the base matter
Providers differ in what they charge a percentage on: some use the item price only, others include shipping or tax. A calculator can only be as accurate as the base you give it, so check which amount the fee applies to before you compare providers.
Fees are not the whole cost
Fees are one part of what a sale costs you. Product cost, shipping, refunds, currency conversion and taxes all come on top, so treat the net payout as a starting point for a pricing decision, not the profit.
Frequently Asked Questions
What business calculators are available?
There are three business calculators for online sellers: the PayPal Fee Calculator, the Stripe Fee Calculator and the Etsy Fee Calculator. Each one shows the fees taken from a sale and the amount you keep.
Are these business calculators free?
Yes. Every calculator is free to use as often as you like, with no signup and no download.
Is my sales data stored or sent anywhere?
No. All calculations run in your browser. The amounts and rates you type are not sent to a server, stored or shared.
Are the fee results exact?
They are estimates. Payment and marketplace fees change over time and depend on your country, account type, currency and payment method, so check the provider's own fee page for the rate that applies to you before you set prices. This is not financial or tax advice.
How do I work out the price I need to charge to cover fees?
Fees are usually a percentage of the sale plus a fixed amount, so the amount you keep is the price minus both. To keep a target amount you need to charge more than the target, because the percentage fee also applies to the part that covers the fee. Each fee calculator on this page shows the fees and the net amount so you can test a few prices.
Which calculator should I use for a tax-inclusive price?
Use the VAT Calculator or the GST Calculator to split a price into the net amount and the tax. Then use a fee calculator on the amount the fee provider actually charges its percentage on.
Last reviewed: November 2026 — formulas and worked examples verified.