/
Free health calculators for BMI, daily calories, ideal weight, body fat, water intake, and fitness tracking. Science-based formulas for your wellness.
Calculate your Body Mass Index
Calculate daily calorie needs
Calculate your ideal body weight
Calculate body fat percentage
Calculate daily water needs
Calculate your Basal Metabolic Rate
Calculate your Total Daily Energy Expenditure
Calculate your baby's due date
Track your fertile window and ovulation
Calculate your daily macronutrient needs
Calculate BSA using medical formulas
Estimate blood alcohol content
Track your current pregnancy week
Estimate your conception date
Calculate your training heart rate zones
Calculate peptide reconstitution and dosage
Convert A1C to blood sugar and vice versa
Calculate calories in Starbucks drinks
Take control of your health with our free health and fitness calculators. Calculate your BMI, estimate daily calorie needs, track fitness metrics, and make informed decisions about your wellness journey. All calculations are private and happen entirely in your browser.
Our calculators use scientifically validated formulas like the Mifflin-St Jeor equation for BMR and WHO standards for BMI.
Enter your specific details - age, height, weight, activity level - to get calculations tailored to your body and lifestyle.
Your health data is sensitive. That's why all calculations happen locally in your browser - we never see or store your information.
Results come with clear explanations of what the numbers mean and how they relate to your health goals.
Use our calculators regularly to monitor changes as you work toward your fitness and wellness goals.
Switch between metric (kg, cm) and imperial (lbs, inches) units based on your preference.
Select the health calculator that matches your goal - BMI assessment, calorie needs, or fitness tracking.
Enter your personal information such as age, gender, height, weight, and activity level as required.
Review your personalized results along with explanations of what the numbers mean for your health.
Use the recommendations to inform your diet and exercise decisions, but remember to consult healthcare providers for medical advice.
Return regularly to track your progress and adjust your goals as your fitness level changes.
Calculate your BMI and daily calorie needs to create a sustainable plan for weight loss or weight gain.
Determine how many calories you need based on your activity level and fitness goals.
Regularly check your BMI and other metrics to track your progress over time.
Understand your macronutrient needs and plan meals that support your health goals.
Our calculators use scientifically validated formulas and provide good estimates for most adults. However, individual results can vary based on factors like muscle mass, genetics, and health conditions. Always consult healthcare professionals for medical advice.