Age & BMI Calculator

*** Calculate Your exact age.***
*** A healthy weight for every age. ***
Age & BMI Calculator works out age to the day from any date, then checks BMI the way the World Health Organization does — fixed cut-offs for adults, and z-scores against WHO growth curves for babies, children and teens.

** Age calculator **
Age in years, months and days between any two dates — today or a date in the past or future. Also shows total months, weeks, days and hours, the weekday you were born, and a countdown to the next birthday. Leap-day birthdays are handled.

**Adult BMI, 19 years and older**
Uses the WHO adult classification, from severe thinness to obesity class III, plus the healthy weight range for your height. Metric or imperial.

**Child & teen BMI, birth to 19**
Plots BMI-for-age with WHO z-scores and percentiles: the 2006 Child Growth Standards for under-5s and the 2007 Growth Reference for 5–19 years.