10+ Free Health & Fitness Calculators | Utilko
Free online health and fitness calculators — BMI calculator, body fat percentage, calorie calculator, TDEE, pace calculator, sleep calculator, and more. No sign-up.
Free Health & Fitness Calculators
Understanding your body's numbers is the first step to improving your health. Utilko's health calculators are free, browser-based, and give you instant results without requiring an app download or account creation.
Body Composition
- BMI Calculator — Calculate your Body Mass Index using height and weight. See which BMI category you fall into and what it means for health risk.
- Body Fat Calculator — Estimate your body fat percentage using the US Navy method (neck, waist, and hip measurements). More accurate than BMI for athletic individuals.
Nutrition & Calories
- Calorie Calculator — Calculate your daily calorie needs for weight loss, maintenance, or muscle gain based on age, gender, weight, height, and activity level.
- TDEE Calculator — Calculate your Total Daily Energy Expenditure — the total calories you burn per day including exercise and daily activity.
Fitness & Exercise
- Pace Calculator — Calculate running pace, speed, and finish times for 5K, 10K, half marathon, and marathon distances.
Sleep & Recovery
- Sleep Calculator — Calculate the optimal bedtimes and wake-up times based on sleep cycles to wake up feeling refreshed.
Pregnancy & Family Planning
- Due Date Calculator — Calculate your estimated due date from your last menstrual period or conception date.
- Ovulation Calculator — Identify your fertile window and ovulation day to assist with family planning.
General Health Numbers
- Age Calculator — Calculate your exact age in years, months, and days — useful for understanding health risk by age group.
- Dog Age Calculator — Convert your dog's age to human years to understand their life stage and health needs.
Featured Tools
Try these free tools directly in your browser — no sign-up required.
BMI Calculator
Calculate your Body Mass Index (BMI) using metric or imperial units. Understand your BMI category — underweight, normal, overweight, or obese — instantly.
Body Fat Calculator
Estimate your body fat percentage using the US Navy method or BMI-based formula. Enter your measurements to get your body fat category and ideal weight range.
Calorie Calculator
Calculate your daily calorie needs based on age, height, weight, activity level, and fitness goals. Get personalized targets for weight loss, maintenance, or muscle gain.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (TDEE) — the total calories your body burns each day. Get personalized macro targets for fat loss, muscle gain, or maintenance.
Pace Calculator
Calculate running pace, speed, distance, or finish time for any race. Convert between minutes per mile, minutes per kilometer, and mph/kph for training and race planning.
Sleep Calculator
Calculate the ideal bedtime or wake-up time based on 90-minute sleep cycles. Wake up feeling refreshed by timing your alarm to the end of a full sleep cycle.