Health Calculators

Calculate your Body Mass Index (BMI) to check if you are underweight, normal, overweight or obese.

Calculate daily calorie needs based on age, gender, weight, height and activity level.

Find your ideal body weight range using multiple scientific formulas based on height and gender.

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

Calculate your estimated due date, current pregnancy week and trimester from your last period date.

Predict your ovulation date and fertile window based on your menstrual cycle for family planning.

Calculate your recommended daily water intake based on weight, activity level and climate.

Calculate your training heart rate zones for optimal cardio exercise based on age and resting HR.

Calculate BMI percentile for children aged 2-20 based on age, gender, weight and height.

Calculate optimal bedtime or wake time based on 90-minute sleep cycles for better rest quality.

Free daily protein calculator. Find how much protein you need per day based on weight, activity level and fitness goal.

Free period calculator and menstrual cycle tracker. Predict next period, fertile window and ovulation day based on last period.

Free creatinine clearance calculator using Cockcroft-Gault equation to estimate kidney function and GFR stage from age, weight and creatinine.