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Free Health & Fitness Calculators

13 tools

Track your health and fitness with free calculators for BMI, calories, BMR, body fat, sleep cycles, and pregnancy, built on trusted formulas.

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BMI Calculator Calculate your Body Mass Index (BMI) to assess whether you are underweight, normal, overweight, or obese based on height and weight. Water Intake Find out how much water you should drink daily based on your weight, activity level, and climate. Stay hydrated and healthy. Calorie Estimator Estimate your daily calorie needs based on age, gender, weight, height, and activity level to support weight loss, gain, or maintenance. Body Fat Calculator Estimate your body fat percentage using the US Navy method. Enter your measurements to gauge your fitness level and health risk. BMR Calculator Calculate your Basal Metabolic Rate (BMR) - the number of calories your body burns at rest - using the Mifflin-St Jeor equation. Ideal Weight Calculator Find your ideal healthy body weight based on height and gender using the Devine and Robinson formulas recommended by health experts. Pace Calculator Calculate your running pace, speed, or finish time for any distance. Great for 5K, 10K, half-marathon, and marathon training. Pregnancy Calculator Track your pregnancy week by week. Find your current trimester, estimated due date, and key milestones from your last menstrual period. Conception Calculator Identify your most fertile days and ovulation window to plan or understand conception. Based on your menstrual cycle length. Due Date Calculator Calculate your estimated due date (EDD) from your last period or conception date. Includes a week-by-week pregnancy timeline. Protein Intake Calculator Find the right daily protein intake for your body weight and fitness goal - whether building muscle, losing fat, or staying healthy. Sleep Calculator Find the best bedtime or wake-up time based on 90-minute sleep cycles for maximum alertness and restfulness. BAC Calculator Estimate your blood alcohol content (BAC) based on drinks consumed, body weight, gender, and time elapsed. For educational use only.

About Health Tools

These tools translate established medical and fitness formulas - like the Mifflin-St Jeor equation for metabolism and the US Navy method for body fat - into quick, easy answers. Use the BMI Calculator and Body Fat Calculator to gauge your composition, the Calorie Estimator to plan your intake, or the Sleep Calculator to time your rest.

The results are general estimates and are not a substitute for professional medical advice. For any health concern, please consult a qualified healthcare provider.

Frequently Asked Questions

Are these health tools medical advice?

No. They provide general estimates for information only and do not replace advice from a qualified healthcare professional.

What formulas do they use?

They use well-established methods, such as the BMI formula, the Mifflin-St Jeor equation for BMR, and the US Navy method for body fat.

Is my personal data kept private?

Yes. The calculations happen in your browser, so details like your height, weight, and age are not stored on a server.