About World of the Developers
World of the Developers builds custom IT tooling — single-page websites, WHMCS modules, and hosting panel plugins — and maintains a free collection of 34 calculators for finance, health, and AI costs on the side.
Built to your workflow
Every project is scoped to what you actually need — no generic templates or bloated agency retainers.
Checked against benchmarks
Calculator formulas are verified against known worked examples and official pricing sources — not just implemented and assumed correct.
No sign-up, no tracking walls
Every calculator runs entirely in your browser. Nothing you enter is sent anywhere unless you use the contact form below.
Calculators here are informational tools, not professional advice — see each calculator's page for specifics, and the site-wide disclaimer in the footer.
Contact
Found a bug, have a calculator request, or spotted a pricing figure that's gone stale? Send a message below.