Health Calculators
BMI, calories, fitness, and pregnancy calculators.
Track your fitness, nutrition, and wellness goals with calculators for BMI, calories, TDEE, body fat, heart rate zones, and pregnancy milestones — built on established medical and fitness formulas.
BMI Calculator
Calculate your Body Mass Index and healthy weight range.
Open Calculator →Daily Calorie Calculator
Find your daily calorie intake and caloric needs for weight goals.
Open Calculator →Body Fat Calculator
Estimate body fat percentage using the US Navy method.
Open Calculator →BMR Calculator
Calculate your Basal Metabolic Rate at rest.
Open Calculator →Macro Calculator
Calculate ideal protein, carb, and fat intake.
Open Calculator →Ideal Weight Calculator
Find your ideal body weight using multiple formulas.
Open Calculator →TDEE Calculator
Calculate Total Daily Energy Expenditure.
Open Calculator →Protein Calculator
Calculate daily protein needs based on goals and activity.
Open Calculator →Heart Rate Zone Calculator
Find your target heart rate training zones.
Open Calculator →Calories Burned Calculator
Estimate calories burned during exercise activities.
Open Calculator →BAC Calculator
Estimate blood alcohol content using the Widmark formula.
Open Calculator →Ovulation Calculator
Predict ovulation and your most fertile days.
Open Calculator →Period Calculator
Track and predict your next menstrual cycle.
Open Calculator →Pregnancy Calculator
Track pregnancy week by week from your last period.
Open Calculator →Due Date Calculator
Estimate your baby's due date.
Open Calculator →Conception Calculator
Estimate the likely date of conception.
Open Calculator →One Rep Max Calculator
Estimate your 1-rep max for any lift.
Open Calculator →Pace Calculator
Calculate running pace, time, or distance.
Open Calculator →Bra Size Calculator
Find your correct bra size from measurements.
Open Calculator →Army Body Fat Calculator
Calculate body fat percentage using the US Army standard.
Open Calculator →GFR Calculator
Estimate kidney function using the CKD-EPI formula.
Open Calculator →Lean Body Mass Calculator
Calculate lean body mass using the Boer formula.
Open Calculator →Body Surface Area Calculator
Calculate body surface area using the Mosteller formula.
Open Calculator →Daily Water Intake Calculator
Calculate your recommended daily water intake based on weight and activity.
Open Calculator →Frequently Asked Questions
Are these health calculators a substitute for medical advice?
No. These tools provide general estimates for informational purposes only and are not a substitute for professional medical or nutritional advice.
Which calculator should I use to set a calorie target?
Start with the TDEE Calculator or Daily Calorie Calculator to find your maintenance calories, then adjust up or down based on your weight goal.