Calculators & Converters
BMI, age, date difference, unit conversion, and more free online calculators. Every calculation runs client-side — nothing is stored or transmitted.
Age Calculator
Calculate your exact age in years, months, and days from any date of birth. See total weeks, total days, and a countdown to your next birthday — free, no sign-up, nothing leaves your browser.
Open tool FreeDate Calculator
Calculate the exact number of days between any two dates. See weeks, business days, months, and a full calendar breakdown — free, no sign-up, nothing leaves your browser.
Open tool FreeBMI Calculator
Calculate your Body Mass Index instantly in metric (cm/kg) or imperial (ft/in/lbs). See your BMI score, WHO category, and a colour-coded gauge — free, no sign-up, nothing leaves your browser.
Open tool FreeUnit Converter
Convert between hundreds of units across eight categories — length, weight, temperature, volume, area, speed, time, and data. Results update as you type. Free, no sign-up, nothing leaves your browser.
Open toolWhy trust our Calculators & Converters
- All calculations run in JavaScript inside your browser — inputs are never transmitted
- No round-trips: results appear instantly without touching a server
- No account, no email, no tracking
- Results are informational; always verify with a qualified professional where it matters