BMI
Calculate adult body mass index.
18 tools
Health calculators
Choose the question you actually want answered. Each page includes plain-language input examples, a result breakdown, assumptions, Pro scenario comparison and related tools.
Calorie
Estimate adult maintenance calories and a modest goal adjustment.
TDEE
Estimate total daily energy expenditure from BMR and activity.
Protein
Estimate an adult daily protein range from body weight and activity.
Macro
Split an adult calorie target into protein, carbohydrate and fat.
Water Intake
Estimate a practical daily fluid starting point for adults.
Body Fat
Estimate adult body-fat percentage from circumference measurements.
Healthy Weight Range
See the adult BMI reference weight range for a given height.
Weight Goal Timeline
Estimate an adult weight-change timeline using a modest energy gap.
Steps to Calories
Estimate energy used during walking from steps and body weight.
Running Pace
Calculate running pace from distance and finishing time.
Running Distance
Estimate distance from running pace and elapsed time.
Sleep Time
Work out a bedtime or wake time from a chosen sleep duration.
Heart Rate Zones
Estimate exercise heart-rate zones using age and resting pulse.
One Rep Max
Estimate one-repetition maximum from a submaximal lift.
Pregnancy Due Date
Estimate a due date from the first day of the last menstrual period.
Ovulation
Estimate a cycle-based ovulation window for general information.
Calorie Burn
Estimate exercise energy use from MET value, weight and duration.