Free Fitness & Health Calculators
5 free calculators to track your health and fitness goals. Calculate your BMI, BMR, daily calorie needs, macronutrients, and body fat percentage. All tools run in your browser with no signup.
BMI Calculator
Calculate Body Mass Index with health insights
BMR Calculator
Calories burned at rest (basal metabolic rate)
Calorie Calculator
Daily calorie needs based on activity and goals
Macro Calculator
Protein, carbs, and fat recommendations
Body Fat Calculator
Estimate body fat percentage (Navy method)
How to Use Fitness Calculators Effectively
Start with the BMI calculator to understand your general weight category. Then use the BMR calculator to find your baseline calorie burn. Combine this with the calorie calculator to set daily targets, the macro calculator to plan your diet, and the body fat calculator to track composition changes over time.
Frequently Asked Questions
Are these calculators accurate?
They use established medical formulas (WHO, Mifflin-St Jeor, Navy method). Results are estimates — consult a doctor for medical decisions.
What is the difference between BMI and body fat percentage?
BMI uses only height and weight. Body fat percentage estimates actual fat mass using measurements like waist and neck circumference, giving a more accurate picture.
How often should I recalculate?
Recalculate BMI and body fat monthly. Recalculate BMR and calorie needs after every 10 pounds of weight change.