Health & Fitness
Scientific health and fitness calculators based on WHO and scientific standards: Body Mass Index (BMI), Basal Metabolic Rate (BMR), target heart rate, and daily macro nutrients.
All Tools in this Category19
Calories Burned Calculator
Calculate calories burned across 50+ activities based on MET values, weight, and duration.
Macro Calculator
Calculate optimal daily macronutrient distributions (protein, carbs, fats) tailored to your weight, activity level, and fitness objectives.
Calorie Calculator
Calculate daily calorie intake for weight loss (-500 kcal), maintenance, or muscle gain.
Daily Protein Intake Calculator
Calculate daily protein targets in grams for muscle hypertrophy, fat loss, or general health.
BMI Calculator
Calculate Body Mass Index (BMI) and health risk classification based on WHO standards.
BMR Calculator
Calculate your Basal Metabolic Rate (BMR) - the exact calories burned at complete rest.
TDEE Calculator
Calculate Total Daily Energy Expenditure (TDEE) and exact calories needed for cutting, maintaining, or bulking.
Body Fat Calculator
Calculate body fat percentage, lean muscle mass, and fat categories using the US Navy Method.
Ideal Weight Calculator
Calculate ideal body weight (IBW) based on height, gender, and clinical formulas.
Running Pace & Marathon Split Calculator
Calculate running pace, kilometer/mile splits, and finish times for 5K, 10K, Half Marathon, and Marathon.
Pace Calculator
Calculate running pace, elapsed time, or distance with instant unit conversion.
Steps to Miles & Kilometers Calculator
Convert step counts into exact miles, kilometers, and calories burned based on stride length.
Miles to Steps Calculator
Convert miles to exact walking or running steps based on height and stride length.
Max Heart Rate Calculator
Calculate theoretical maximum heart rate (HRmax) and age-adjusted cardiovascular limits.
Target Heart Rate Calculator
Calculate 5 target heart rate training zones using Karvonen and %HRmax formulas.
One Rep Max Calculator
Calculate 1-Repetition Maximum (1RM) strength and training percentages across 7 formulas.
Sleep Cycle Calculator
Calculate optimal bedtimes and wake times based on 90-minute natural sleep cycles.
Intermittent Fasting Calculator & Protocol Schedule
Calculate exact fasting and eating windows for 16:8, 14:10, 18:6, 20:4, and OMAD protocols.
Daily Water Intake Calculator
Calculate optimal daily water intake in liters and cups based on weight, activity, and climate.