Free Fitness Calculators

Science-backed calculators for metabolism, nutrition, training, and recovery

12
Free Calculators
500K+
Pounds Lost
100%
Science-Backed
Popular
🔥

BMR Calculator

Calculate your Basal Metabolic Rate using Mifflin-St Jeor & Katch-McArdle formulas

450K monthly searches
Popular

TDEE Calculator

Determine your Total Daily Energy Expenditure based on activity level

320K monthly searches
Popular
💪

1RM Calculator

Calculate your one-rep max using Brzycki formula or RPE-based estimation

135K monthly searches
📉

Calorie Deficit Calculator

Determine how many calories to eat for sustainable weight loss

33K monthly searches
📈

Glycemic Load Calculator

Calculate blood sugar impact of foods for better energy and fat loss

22K monthly searches
🥗

Macro Calculator

Calculate optimal protein, carbs, and fats for your goals

18K monthly searches
💧

Hydration Calculator

Calculate daily water needs and workout sweat rate

18K monthly searches
🎯

Goal Weight Calculator

Plan realistic timeline to reach your target weight with safe rates

15K monthly searches
🏋️

Training Volume Calculator

Track workout volume load for progressive overload

12K monthly searches
🔄

Body Recomposition Calculator

See how muscle gain and fat loss impact your metabolism

8K monthly searches
📊

MET Activity Calculator

Build precise TDEE from your actual daily activities

8K monthly searches
🍗

Protein Per Meal Calculator

Optimize protein distribution for muscle protein synthesis

5K monthly searches

Need Multiple Calculations?

Use our all-in-one calculator page to run multiple calculations without switching pages. Perfect for comprehensive assessments.

Open All-in-One Calculator