Health Tools
Health Calculators
Free, private health calculators built on published medical formulas — from BMI and calories to due dates, blood pressure and HbA1c. Every calculation runs in your browser; nothing is sent to us.
12Calculators
4Topics
0Data sent to us
∞Free to use
Calculators
Weight & body
Weight & body
BMI Calculator
Body Mass Index on the WHO and Asian Indian scales, with your healthy weight range.
Weight & body
Calorie Calculator
Daily calories to maintain, lose or gain weight, from the Mifflin-St Jeor equation.
Weight & body
Ideal Weight Calculator
Ideal body weight by the Devine formula, plus the healthy BMI range for your height.
Weight & body
Body Fat Calculator
Body fat percentage from a tape measure, using the U.S. Navy method.
Weight & body
Waist-to-Height Ratio Calculator
Is your waist under half your height? Central-fat risk by NICE bands and Indian cut-offs.
Calculators
Women's health
Women's health
Pregnancy Due Date Calculator
Due date, current week and trimester from your last period, conception or IVF transfer.
Women's health
Ovulation Calculator
Your fertile window, ovulation day and next period for the next three cycles.
Women's health
Pregnancy Weight Gain Calculator
Recommended pregnancy weight gain for your BMI, and whether you are on track.
Calculators
Heart & diabetes
Heart & diabetes
Blood Pressure Checker
What your reading means, on the American Heart Association categories.
Heart & diabetes
HbA1c Calculator
Convert HbA1c to average blood sugar, or average sugar back to HbA1c.
Heart & diabetes
Heart Rate Zone Calculator
Maximum heart rate and five training zones, with or without your resting rate.
For general information only — not medical advice, diagnosis or treatment. These calculators use population formulas that cannot account for every individual, and are meant for adults unless stated. Always speak to a qualified doctor about your health, and never delay seeking care because of a result here.