What is GameDevTool?
GameDevTool is a small collection of free calculators for people who make games. Creator platforms have fees, revenue splits and payout rules that are easy to get wrong in your head, so each tool turns one of those rules into a simple form with a clear answer.
Right now the site covers Roblox: how much you keep after the Marketplace Fee, what your Earned Robux are worth through the Developer Exchange, what Robux cost in dollars, how avatar item earnings are shared, and how a Limited resale is split. Each calculator comes with a written explanation, a worked example and answers to common questions.
How we keep the tools useful
We check rates and fees against the official Roblox Creator Hub, note when we last did so, and show the formula behind every result. The tools run entirely in your browser, need no account, and never ask for your Roblox login. We plan to add tools for more game platforms over time.
Have a question, a correction or a calculator you would like to see? Visit the contact page.