Body Mass Index with healthy-range guidance.
Calculate your BMI from height and weight (metric or imperial) and see which of the five WHO categories it falls into, with a healthy-weight range for your height.
100% client-side — zero uploads, maximum privacy
Instant results — no waiting for server processing
Secure — your data never leaves your browser
Free to use — no sign-up required
Real-time calculation as you type — no submit button needed
Step-by-step breakdowns for full transparency
Amortization schedules, unit conversions, and health formulas
Bookmarkable results for quick reference
Works offline after initial page load
Track body mass index for personal fitness goals
Calculate BMI from weight and height measurements
Compare BMI across metric and imperial input units
Monitor health trends over time with regular calculations
Use as a screening tool alongside other health metrics
BMI does not distinguish muscle from fat, so very muscular people may show as overweight. Use it as a rough guide only.
Percentage of, percentage change and percentage increase/decrease.
Monthly payment, total interest and full amortization schedule.
Length, weight, temperature, data, area, volume, time and speed conversion.
Exact age in years, months, days, plus days until your next birthday.
Days between dates, add/subtract days from a date, weekday lookup.
Convert between decimal, hex, binary and octal with ASCII view.