Health Calculators
27 calculators in this category
BMI Calculator
Calculate your Body Mass Index (BMI) instantly with metric or imperial units. Free BMI calculator with healthy weight range and category guidance.
Body Fat Calculator
Estimate your body fat percentage using the U.S. Navy circumference method. Free body fat calculator for men and women with fitness category guidance.
Calorie Calculator
Estimate your daily calorie needs using the Mifflin-St Jeor equation. Free calorie calculator for BMR, TDEE, and weight-loss or gain goals.
Due Date Calculator
Estimate your baby's due date and current pregnancy week using the first day of your last menstrual period. Free due date calculator.
Sleep Calculator
Find your ideal bedtime or wake-up time based on 90-minute sleep cycles. Free sleep calculator so you wake up refreshed, not groggy.
BMI Calculator for Women
Calculate BMI tailored for women with healthy weight ranges. Free female BMI calculator.
BMI Calculator for Men
Calculate BMI tailored for men with healthy weight ranges. Free male BMI calculator.
BMI Calculator for Children
Estimate BMI for children and teens. Free pediatric BMI calculator (note: clinical percentile requires growth charts).
BMI Calculator for Seniors
Calculate BMI for older adults. Free senior BMI calculator with adjusted healthy ranges for ages 65+.
Weight Loss Calculator
See how much weight you need to lose to reach a healthy BMI. Free weight loss calculator with goal weight.
Ideal Weight Calculator
Find your ideal weight range based on a healthy BMI. Free ideal body weight calculator.
Body Fat Calculator for Men
Estimate male body fat percentage using the Navy method. Free body fat calculator for men.
Body Fat Calculator for Women
Estimate female body fat percentage using the Navy method. Free body fat calculator for women.
Lean Body Mass Calculator
Calculate your lean body mass from weight and body fat. Free LBM calculator.
Waist-to-Height Ratio Calculator
Calculate waist-to-height ratio, a strong health indicator. Free WHtR calculator.
Weight Loss Calorie Calculator
Find the daily calorie target for sustainable weight loss. Free weight loss calorie calculator.
Muscle Gain Calorie Calculator
Calculate the calorie surplus needed to build muscle. Free muscle gain calorie calculator.
TDEE Calculator
Calculate your Total Daily Energy Expenditure based on activity. Free TDEE calculator.
BMR Calculator
Find your Basal Metabolic Rate (calories at complete rest). Free BMR calculator.
Macro Calculator
Split your daily calories into protein, carbs, and fat. Free macro calculator for balanced nutrition.
Protein Calculator
Estimate your daily protein needs based on weight and activity. Free protein intake calculator.
Conception Date Calculator
Estimate the conception date from your last period. Free conception date calculator.
Pregnancy Week Calculator
Find out how many weeks pregnant you are. Free pregnancy week calculator.
Ovulation Calculator
Predict your ovulation and fertile window. Free ovulation calculator.
Best Bedtime Calculator
Find the best bedtime for your wake-up time. Free bedtime calculator by sleep cycle.
Wake-Up Time Calculator
Find the best wake-up time for your bedtime. Free wake-up time calculator.
Nap Calculator
Find the ideal nap length based on sleep cycles. Free nap calculator.