Which tool do I need?
Pricing a project from scratch? Start with the Freelance Quote Calculator. The classic freelancer mistake is quoting hours × rate and quietly eating the overhead — software, hardware, taxes-you-forgot, the unbillable admin hours around every project. This tool builds those into the price, adds a real profit margin on top, and gives you a negotiation range so the first discount a client asks for doesn't come straight out of your rent. The finished quote copies out client-ready.
Already have a price and want to know what you'll actually keep? That's the Fiverr & Upwork Fee Calculator. It applies the current fee structures (Fiverr credits the seller 80% of an order's purchase amount; Upwork's rate is set per contract, from 0% to 15%) and then the withdrawal fee, which differs by method: from $0 to $50 among the fees the two platforms publish, depending on how you cash out.
Client asks "what would this cost on Fiverr?" Same tool, reverse mode: type the amount you need to end up with, and it tells you the gross price to list so the fees land on top of your number instead of inside it.
Working a platform project end to end? Use both, in order. Build the price with the quote calculator so overhead and margin are covered, then run that price through the fee calculator for your platform and withdrawal method. If the net that comes out is below what the quote said you need, raise the gross — the platform's cut is a business cost like any other, and it belongs in the price, not in your margin.