VO2 Max Calculator – Estimate Your Aerobic Fitness (Free 2026)
Calculate your VO2 max instantly using our free online tool. Uses the Cooper Test or Rockport Walk Test formula. Includes fitness rating chart and tra
Health Calculators
BMI, calorie, age and fitness calculators
Child Height Predictor – How Tall Will My Child Be? (2026 Calculator)
Predict your child’s adult height using the Mid-Parental Height formula and growth tables. Covers boys and girls, average height by age, and tips to maximize height potential.
Calorie Deficit Calculator for Weight Loss (Formula + Table 2026)
Learn how to calculate your daily calorie deficit for weight loss using the TDEE formula. Includes a full calorie deficit table, safe deficit ranges, and practical tips.
Running Pace Calculator Pace, Speed and Finish Time
Quick Answer: Free running pace calculator – calculate your pace per mile, pace per km, speed, and finish time for 5K, 10K, half marathon, and full marathon. Works for any distance. Running Pace Calculator – Find Your Pace, Speed & Race Time Whether you are training for a 5K, 10K, half marathon, or full marathon, … Read more
Water Intake Calculator – How Much Water Should You Drink Per Day?
Quick Answer: Most healthy adults need about 35 ml of water per kg of body weight (roughly 0.5 fl oz per pound) per day — about 2.4 L for a 70 kg person — plus about 350 ml (12 oz) for every 30 minutes of exercise and 10–20% more in hot weather. Use the calculator … Read more
Protein Intake Calculator Daily Protein Need by Weight and Goal
Quick Answer: Free protein intake calculator – find your exact daily protein needs by body weight, activity level, and goal. Works in kg and lbs. Get personalized results instantly. Protein Intake Calculator – How Much Protein Do You Need Per Day? Our protein intake calculator gives you a personalized daily protein target based on your … Read more
Macro Calculator Daily Protein, Carbs and Fat for Your Goal
Quick Answer: Free macro calculator – get your personalized daily protein, fat, and carbs for weight loss, muscle gain, or maintenance. IIFYM results based on your body stats and activity level. Macro Calculator – Daily Protein, Carbs & Fat for Your Goal Our macro calculator gives you a personalized macronutrient breakdown based on your body … Read more
Sleep Cycle Calculator Best Time to Wake Up or Go to Sleep
Quick Answer: Free sleep cycle calculator using 90-minute sleep cycles. Find the best time to wake up or go to sleep and wake up refreshed every morning. Instant results. Sleep Cycle Calculator – Best Time to Wake Up or Go to Sleep Waking up in the middle of a sleep cycle leaves you groggy all … Read more
How to Calculate Sleep Debt and Recover Fast (Free Calculator 2026)
Quick Answer: Calculate your sleep debt with our free calculator. Learn the exact formula, how much sleep you need by age, effects on health, and a 7-day recovery plan. Do you feel tired even after sleeping? You might have sleep debt. Our free sleep debt calculator tells you exactly how many hours of sleep you … Read more
Age Calculator: Calculate Your Exact Age in Years, Months and Days
Calculate your exact age in years, months, and days with our free Age Calculator. Find out how many days old you are and calculate age between any two dates.