got9.com is a collection of 162 free online calculators organised into nine categories: finance, health, fitness, cooking, travel, maths, science, pets and pregnancy. Every calculator is a fast, standalone page with clear inputs and an instant result — no account, no download, no paywall. Whether you're working out a mortgage repayment, checking your BMI or scaling a recipe, the answer is a few keystrokes away.
The site is built around a simple structure: nine categories, each with eighteen calculators arranged nine to a page. That constraint keeps every category focused on the tools people actually use, rather than padding lists with duplicates. Each page of nine covers a coherent theme — everyday money, body metrics, kitchen maths — so related calculators are always one click apart.
Every calculator on got9.com uses standard, published formulas — from amortization maths for loans to the Mifflin-St Jeor equation for calorie needs and WHO growth standards for baby percentiles. Currency conversions use live European Central Bank rates. Where a result is an estimate, such as health metrics or medication guidance for pets, the page says so and explains the method behind the number.
All 162 calculators are free to use with no signup. Pages are lightweight and load quickly on any device, and every result can be shared with a single link that pre-fills your inputs — handy for comparing a mortgage scenario with a partner or sending a running pace to a training buddy. New categories are being added regularly, working towards the full nine.