Fitness
BMI, calorie deficit, one-rep max, water intake, and body metrics calculators.
Showing 16 tools
Fitness
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.