Instant, free calculators for health, finance, kitchen, lifestyle and business. No accounts, no fluff.
MyCalcTools is a free collection of online calculators designed to give you fast, accurate answers to everyday questions — without the sign-up forms, paywalls or cluttered interfaces you find on other sites. Whether you're working out your BMI before a doctor's appointment, calculating your mortgage repayments, figuring out air fryer temperatures or planning a pregnancy, every tool on this site is built to be simple, reliable and genuinely useful.
Every calculator on MyCalcTools runs entirely in your browser. That means your data stays on your device — we never see, store or process the numbers you enter. There are no accounts to create and no personal information required. Just open the tool, enter your details and get your answer in seconds.
Our 27 tools cover five main categories. The health calculators include BMI, calories, pregnancy, ovulation, due date, sleep cycles, water intake and period tracking. The finance calculators cover loans, mortgages, tax (AU/UK/US), pay conversion, insurance, rent affordability and electricity costs. The kitchen tools include the air fryer converter and boiled egg timer. The lifestyle tools cover age, dates, fuel cost, percentages, tips, concrete and screen time. The business tools include Etsy fees, freelancer rates and a scientific calculator.
MyCalcTools is built for Australians but useful everywhere. Finance and tax tools default to Australian figures — ATO tax brackets, Medicare Levy, Fair Work minimum wages and superannuation rates — while also supporting UK and US options. If you spot an error or have a suggestion, contact us via the contact page.