🏥 Health Calculators

Health Calculators

Free, accurate health calculators to help you understand your body — from BMI and calorie needs to body fat, hydration, heart rate, and more.

Calculate your Body Mass Index using height and weight. Supports metric and imperial units.

Daily Calorie Calculator

Find out how many calories you need each day based on your age, weight, height and activity level.

Healthy Weight Calculator

Find the healthy weight range for your height based on WHO BMI guidelines.

Body Fat Percentage Calculator

Estimate your body fat percentage using the US Navy method — waist, neck and hip measurements.

Calculate your Basal Metabolic Rate — the calories your body burns at complete rest.

Water Intake Calculator

Find out how much water you should drink daily based on your weight and activity level.

Ideal Body Weight Calculator

Calculate your ideal body weight using multiple formulas — Devine, Robinson, Miller and Hamwi.

Weight Loss Calculator

Find your daily calorie deficit to reach your goal weight by a target date.

Waist-to-Hip Ratio

Measure your waist-to-hip ratio and assess your risk of heart disease and diabetes.

Heart Rate Zone Calculator

Find your target heart rate zones for fat burn, cardio and peak performance training.

Protein Intake Calculator

Calculate your daily protein needs based on your weight, goal and activity level.

Macro Calculator

Get your personalised daily carbs, protein and fat targets based on your fitness goal.

Sleep Calculator

Find the best times to wake up or go to sleep based on 90-minute sleep cycles.

VO2 Max Calculator

Estimate your aerobic fitness level and VO2 max from your resting heart rate and age.

Running Pace Calculator

Calculate your running pace, finish time or distance for any race or training run.

Steps to Calories Calculator

Convert your daily step count into calories burned based on your weight and height.

Child BMI Calculator

Calculate BMI for children and teenagers aged 2–18 using age and sex-adjusted percentiles.

Blood Pressure Checker

Enter your systolic and diastolic readings to find out your blood pressure category.

Diabetes Risk Calculator

Assess your risk of developing type 2 diabetes based on lifestyle and health factors.

Body Surface Area Calculator

Calculate your body surface area (BSA) using the Mosteller and DuBois formulas.