Welcome to Calculators.fit
Your all-in-one hub for fitness and health calculators. We make it simple for you to track, measure, and improve your health with science-backed tools designed for everyday use.
Comprehensive Health Calculator
Results
Why Calculators.fit?
At Calculators.fit, we believe that fitness isn’t about guessing — it’s about knowing. Whether you’re just starting your fitness journey or pushing for peak performance, our calculators give you the insights you need to make smarter choices.
Key Features
BMI Calculator – Instantly check your Body Mass Index and see if you’re in a healthy range.
BMR Calculator – Find out how many calories your body needs at rest using the trusted Mifflin-St Jeor formula.
TDEE Calculator – Understand how much energy you burn daily based on your activity level.
Water Intake Calculator – Discover how much water your body needs every day.
IBW Calculator – Estimate your ideal body weight depending on your height and gender.
PAL Calculator – Track your physical activity level to manage energy balance.
Heart Rate Zones – Identify your fat burn, cardio, and peak training zones.
Sleep Recommendations – Get personalized sleep guidance based on your habits.
Our Mission
To empower people with simple, accurate, and reliable fitness tools so they can make informed decisions about their health and lifestyle.
- Easy to Use
- Science-Based Formulas
- Free Access Anytime
Explore All Fitness Calculators
At calculators.fit, we bring together all the essential tools you need to track, improve, and optimize your health & fitness goals. Explore our free calculators below:
Body & Weight Calculators
BMI Calculator – Check your Body Mass Index and find out if you’re underweight, healthy, overweight, or obese.
Ideal Weight Calculator – Estimate your healthy weight range based on height and gender.
Body Fat Calculator – Measure your body fat percentage for a clearer picture of your fitness level.
Lean Body Mass Calculator – Calculate your muscle mass and fat-free weight.
Waist-to-Hip Ratio Calculator – Understand fat distribution and health risk factors.
Nutrition & Diet Calculators
BMR Calculator – Find your Basal Metabolic Rate to know how many calories your body burns at rest.
TDEE – Calculate your Total Daily Energy Expenditure.
- Calorie Needs Calculator – Calculate your daily calorie goals.
Macro Split Calculator – Break down calories into proteins, carbs, and fats for optimal nutrition.
Protein Intake Calculator – Find out how much protein you need for muscle growth, recovery, or fat loss.
Water Intake Calculator – Get your recommended daily water consumption.