Fitness & Health Calculators
BMI, calories, nutrition, fitness, pregnancy, and wellness calculators.
Fitness
BMI, calorie deficit, one-rep max, water intake, and body metrics calculators.
Army Body Fat Calculator
Calculate body fat percentage using the US Army method and check against Army fitness standards by age group.
BMI Calculator
Calculate body mass index from height and weight with category guidance.
BMR Calculator
Calculate your Basal Metabolic Rate using the Mifflin-St Jeor or Harris-Benedict formula.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method for men and women.
Bra Size Calculator
Find your bra size from your underbust (band) and fullest bust measurements.
Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor formula based on age, gender, height, weight, and activity.
Calorie Deficit Planner
Plan a calorie deficit from maintenance calories, target rate, and timeline.
Calories Burned Calculator
Estimate calories burned during exercise using MET values for walking, running, cycling, swimming, and more.
Healthy Weight Calculator
Find the healthy weight range for your height based on BMI 18.5–24.9 and get your weight zone.
Height Calculator
Convert height between centimeters and feet/inches, and estimate a child's adult height based on parental heights.
Ideal Weight Calculator
Find your ideal body weight range using Devine, Robinson, and Miller formulas based on height and gender.
Lean Body Mass Calculator
Calculate your lean body mass and fat mass from total body weight and body fat percentage.
One Rep Max Calculator
Estimate one-rep max strength from weight lifted and repetitions.
Pace Calculator
Calculate your running pace per km or mile, and estimate finish times for 5K, 10K, half marathon, and marathon.
Sleep Calculator
Calculate the best bedtime or wake-up time to complete full 90-minute sleep cycles and wake feeling rested.
Water Intake Calculator
Estimate daily water needs based on body weight, activity, and climate.
Pregnancy
Due date, conception, ovulation, and pregnancy planning calculators.
Conception Calculator
Estimate when conception likely occurred from an estimated due date, last menstrual period, or ultrasound dating.
Due Date Calculator
Calculate an estimated due date from LMP, conception date, ultrasound gestational age, or IVF embryo transfer.
Ovulation Calculator
Estimate your ovulation date and 6-day fertile window based on your last period and average cycle length.
Period Calculator
Predict your next period dates and monthly cycle calendar based on your last period and average cycle length.
Pregnancy Calculator
Estimate current pregnancy week, due date, trimester, and milestone dates from LMP, due date, conception, ultrasound, or IVF transfer.
Pregnancy Weight Gain Calculator
Calculate recommended total and weekly pregnancy weight gain based on pre-pregnancy BMI and whether you are carrying one baby or twins.
Nutrition & Diet
Macro, calorie, protein, carbohydrate, TDEE, and body composition calculators.
BAC Calculator
Estimate your Blood Alcohol Content (BAC) based on drinks consumed, body weight, sex, and time elapsed.
Body Surface Area Calculator
Calculate body surface area (BSA) in square meters using height and weight — used in medical dosing and burn area assessment.
Body Type Calculator
Determine whether you are an ectomorph, mesomorph, or endomorph based on frame size and body measurements.
Carbohydrate Calculator
Calculate daily carbohydrate intake in grams based on your calorie target and diet preference.
Fat Intake Calculator
Calculate your daily fat intake target in grams based on total calories and your dietary approach.
GFR Calculator
Estimate your Glomerular Filtration Rate (eGFR) to assess kidney function using the CKD-EPI formula.
Macro Calculator
Calculate your daily macronutrient targets — protein, carbohydrates, and fat — based on your calorie goal and fitness objectives.
Protein Calculator
Calculate your recommended daily protein intake in grams based on your weight, activity, and fitness goal.
TDEE Calculator
Calculate your Total Daily Energy Expenditure — the calories you burn each day including all activity.