All Online Tools & Free Calculators

Calculate calories burned across 50+ activities based on MET values, weight, and duration.

Calculate optimal daily macronutrient distributions (protein, carbs, fats) tailored to your weight, activity level, and fitness objectives.

Calculate daily calorie intake for weight loss (-500 kcal), maintenance, or muscle gain.

Calculate daily protein targets in grams for muscle hypertrophy, fat loss, or general health.

Calculate Body Mass Index (BMI) and health risk classification based on WHO standards.

Calculate exact fasting and eating windows for 16:8, 14:10, 18:6, 20:4, and OMAD protocols.

Calculate optimal bedtimes and wake times based on 90-minute natural sleep cycles.

Calculate Total Daily Energy Expenditure (TDEE) and exact calories needed for cutting, maintaining, or bulking.

Calculate 1-Repetition Maximum (1RM) strength and training percentages across 7 formulas.

Calculate 5 target heart rate training zones using Karvonen and %HRmax formulas.

Calculate theoretical maximum heart rate (HRmax) and age-adjusted cardiovascular limits.

Convert miles to exact walking or running steps based on height and stride length.

Convert step counts into exact miles, kilometers, and calories burned based on stride length.

Calculate running pace, elapsed time, or distance with instant unit conversion.

Calculate running pace, kilometer/mile splits, and finish times for 5K, 10K, Half Marathon, and Marathon.

Calculate ideal body weight (IBW) based on height, gender, and clinical formulas.

Calculate body fat percentage, lean muscle mass, and fat categories using the US Navy Method.

Calculate your Basal Metabolic Rate (BMR) - the exact calories burned at complete rest.

Calculate optimal daily water intake in liters and cups based on weight, activity, and climate.