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Health and Fitness Tools

Free online health and fitness calculators and converters. Fast, accurate, and always free — no sign-up needed.

21 Tools Instant Results Always Free
21 tools
#1
BMI Calculator
Use this free BMI Calculator to check your body mass index, BMI category, healthy weight range, and fitness guidance instantly.
#2
BMR Calculator
Use this BMR Calculator to estimate your basal metabolic rate and daily calorie needs based on age, gender, height, weight, and activity level.
#3
Body Fat Calculator
Use this free Body Fat Calculator to estimate your body fat percentage with waist, neck, hip, height, age, and gender inputs.
#4
Calorie Calculator
Use this calorie calculator to estimate daily calories, BMR, TDEE, BMI, and weight goals with activity level and macro guidance.
#5
Calories Burned Calculator
Use our Calories Burned Calculator to estimate calories burned during walking, running, cycling, workouts, and daily activities.
#6
convert steps to miles
Convert steps to miles using stride length, height, or default walking data. Fast, accurate, mobile-friendly steps calculator.
#7
dog pregnancy calculator
Use this dog pregnancy calculator to estimate your dog’s due date, pregnancy week, whelping range, and care timeline.
#8
Heart Rate Calculator
Use this Heart Rate Calculator to find your maximum heart rate, target heart rate zones, and workout intensity levels by age.
#9
Ideal Weight Calculator
Use our Ideal Weight Calculator to estimate your healthy body weight by height and gender with multiple trusted formulas.
#10
kt/v calculator
Calculate single-pool Kt/V and URR using pre- and post-dialysis BUN, treatment time, fluid removed, and post-dialysis weight.
#11
Lean Body Mass Calculator
Use our Lean Body Mass Calculator to estimate fat-free body weight using Boer, James, and Hume formulas in metric or imperial units.
#12
Macro Calculator
Use this macro calculator to estimate daily protein, carbs, and fat needs based on your body, goal, and activity level.
#13
One Rep Max Calculator
Use this One Rep Max Calculator to estimate your maximum lift, training percentages, and strength levels for smarter workout planning.
#14
Ovulation Calculator
Use this ovulation calculator to estimate your fertile window, ovulation date, and next period based on your cycle details.
#15
Pace Calculator
Use this pace calculator to find running pace, finish time, or distance for races, training, marathons, and fitness goals.
#16
post office fd calculator
Use our Post Office FD Calculator to estimate maturity amount, total interest and yearly returns for 1, 2, 3 or 5-year time deposits.
#17
Pregnancy Due Date Calculator
Use this pregnancy due date calculator to estimate your baby’s due date by last period, conception date, IVF date, or ultrasound.
#18
Protein Intake Calculator
Calculate your daily protein intake by weight, goal, activity, and meals. Get grams per day, calories from protein, and meal targets instantly.
#19
TMB Calculadora
Thousands of free online calculators and converters for math, finance, health, science, and everyday life. Fast, accurate, and always free.
#20
Waist to Hip Ratio Calculator
Use our Waist to Hip Ratio Calculator to check your WHR, understand body fat distribution, and view general health risk guidance instantly.
#21
Water Intake Calculator
Use this water intake calculator to estimate your daily water needs based on weight, activity level, weather, and personal hydration goals.

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