🏥 Health Calculators (2026) – Free BMI, Calorie, BMR & Fitness Tools

14 free evidence-based health and fitness calculators for weight management, nutrition, and wellness. Calculate BMI, calories (TDEE), BMR, body fat, macros, ideal weight and more.

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BMI Calculator
Body mass index and weight category.
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Calorie Calculator
Daily calorie needs (TDEE) by goal.
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BMR Calculator
Basal metabolic rate using 4 formulas.
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Body Fat Calculator
US Navy circumference method.
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Ideal Weight Calculator
5 formula comparison.
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Water Intake Calculator
Daily hydration needs by weight and activity.
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Heart Rate Zone Calculator
5 training zones with Karvonen formula.
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Macros Calculator
Protein, carbs, and fat targets by goal.
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Pregnancy Due Date Calculator
EDD from LMP or conception date.
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Sleep Calculator
Best bedtime and wake-up times.
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Steps to Calories
Calories burned by step count.
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Pace Calculator
Running pace, time, and distance.
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Ovulation Calculator
Fertile window from cycle length.
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One Rep Max Calculator
1RM estimate from reps and weight.

Understanding Our Health Calculators

Achieving your health and fitness goals requires understanding your body's metrics. Our suite of free health calculators provides accurate, evidence-based calculations to help you make informed decisions about nutrition, exercise, and weight management. Whether you're looking to lose weight, build muscle, or simply maintain a healthy lifestyle, these tools give you the data you need.

All calculations use medically validated formulas and run instantly in your browser. Your data never leaves your device, ensuring complete privacy. Each calculator includes detailed explanations of the formulas and how to interpret your results.

⚖️ Weight Management Calculators

These calculators help you understand your current weight status and set realistic goals. Use them to track progress and make informed decisions about your weight management journey.

BMI Calculator Ideal Weight Calculator Body Fat Calculator Calorie Calculator (TDEE)

The BMI calculator is our most popular tool, providing a quick assessment of your weight category. For more detailed body composition analysis, use our body fat calculator which uses the US Navy method. Pair these with our calorie calculator to understand your daily energy needs.

🔥 Metabolism & Nutrition Calculators

Understanding your metabolism is key to effective weight management. These tools help you calculate your calorie needs at different activity levels.

BMR Calculator Calorie Calculator Macros Calculator Water Intake Calculator

Your BMR (Basal Metabolic Rate) is the calories your body burns at rest. Our TDEE calculator multiplies this by your activity level to find your total daily energy expenditure. Use our macros calculator to split those calories into optimal protein, carb, and fat ratios for your goals.

🏃 Fitness & Exercise Calculators

Optimize your workouts with these specialized fitness calculators. From heart rate training zones to one-rep max estimates, these tools help athletes of all levels.

Heart Rate Zone Calculator Pace Calculator One Rep Max Calculator Steps to Calories

The heart rate zone calculator uses the Karvonen formula to determine optimal training intensities. Runners can use our pace calculator to plan race strategies. Strength athletes benefit from our 1RM calculator for programming lifts.

Why Use Health Calculators?

Understanding your body metrics empowers you to make informed health decisions. Here's why our free health calculators are valuable:

All our calculators are free to use, require no signup, and process data locally in your browser for complete privacy.

Connect With Other Calculators

Your health goals connect with other areas of your life. Explore these related calculators:

🏦 Finance Calculators

Plan major purchases like home or car with our loan calculators.

➗ Math Calculators

Everyday math tools for calculations and conversions.

📅 Date & Time

Age calculations, day counting, and time zone tools.

📖 Featured Health Guides

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BMR vs TDEE: Understanding Your Energy Needs
Learn the difference between BMR and TDEE for effective nutrition planning.
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What Is BMI and How to Calculate It
Understand your BMI score and what it means for your health.
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How Many Calories Should You Eat Per Day?
Science-backed guide to calculating your daily calorie needs.
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