Fitoragen-Easy to use free 20 health & fitness calculators
20 Health & Fitness Calculators
Calculate BMI, BMR, TDEE, daily calories, body fat, protein, macros, hydration, heart-rate zones, running pace and more with Fitoragen's free health and fitness tools.
Free Health & Fitness Tools for Everyday Planning
Fitoragen's Health & Fitness Calculator Hub brings together practical calculators for fitness, nutrition, weight management, hydration, exercise and general wellness. Enter your information to get an estimate instantly.
These calculators are designed for educational and planning purposes. Results can vary because individual health, activity level, body composition and other factors are different for every person.
BMI Calculator
Estimate Body Mass Index from your height and weight.
BMR Calculator
Estimate calories your body uses at complete rest.
TDEE Calculator
Estimate your total daily energy expenditure.
Daily Calorie Calculator
Estimate daily calories for maintenance, loss or gain.
Calorie Deficit Calculator
Estimate a calorie target below maintenance calories.
Ideal Weight Calculator
Estimate reference body weight using a height-based formula.
Body Fat Calculator
Estimate body-fat percentage using circumference measurements.
Lean Body Mass Calculator
Estimate lean body mass from weight and body-fat percentage.
Water Intake Calculator
Get a simple daily hydration estimate based on body weight.
Protein Intake Calculator
Estimate a daily protein range based on body weight and goal.
Macro Calculator
Split daily calories into protein, carbohydrates and fat.
Heart Rate Zone Calculator
Estimate training zones from age-based maximum heart rate.
Target Heart Rate Calculator
Estimate a target training heart rate using the Karvonen method.
One Rep Max (1RM) Calculator
Estimate your one-repetition maximum from weight and reps.
Running Pace Calculator
Calculate average running pace from distance and time.
Sleep Cycle Calculator
Estimate wake-up times using approximately 90-minute sleep cycles.
Waist-to-Hip Ratio Calculator
Calculate the ratio between waist and hip circumference.
Calorie Burn Calculator
Estimate calories burned during an activity using MET values.
Body Surface Area Calculator
Estimate body surface area from height and weight.
Pregnancy Due Date Calculator
Estimate an expected due date from the first day of the last menstrual period.
How These Health Calculators Work
Fitoragen's calculators use common mathematical equations and estimation methods to provide quick informational results. Examples include BMI, the Mifflin-St Jeor equation for BMR, activity multipliers for TDEE, circumference-based body-fat estimation, weight-based hydration estimates and other commonly used fitness formulas.
Calculator outputs are estimates rather than personalized medical recommendations. Individual results can differ depending on age, body composition, health status, training, medications, pregnancy status and other factors.
Frequently Asked Questions
What is a BMI calculator?
BMI is a weight-to-height index commonly used as a screening measure. It does not directly measure body fat or account for every difference in body composition.
What is the difference between BMR and TDEE?
BMR estimates the energy your body needs at rest. TDEE estimates daily energy expenditure after taking activity into account.
Can these calculators diagnose a health condition?
No. These tools provide estimates for educational and planning purposes and should not be used as a substitute for professional medical advice, diagnosis or treatment.
Are the calorie and macro results exact?
No. Energy needs and nutrient requirements vary between individuals. Calculator results should be treated as starting estimates rather than exact prescriptions.
How accurate is the pregnancy due date calculator?
It provides an estimated due date based on the date entered. A healthcare professional can provide a more individualized assessment, including dating based on clinical information and ultrasound when appropriate.
Are my calculator values sent to Fitoragen?
These calculators perform their calculations in your browser and do not require an account or server submission to calculate results.
Health Disclaimer
The information and calculators on this page are provided for general educational and informational purposes only. They are not intended to diagnose, treat, cure or prevent any disease or medical condition. Calculator results are estimates and may not apply to every individual. Consult a qualified healthcare professional for personal medical, nutritional, pregnancy or exercise advice.
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