Free Fitness Calculators
Science-backed calculators for metabolism, nutrition, training, and recovery
BMR Calculator
Calculate your Basal Metabolic Rate using Mifflin-St Jeor & Katch-McArdle formulas
TDEE Calculator
Determine your Total Daily Energy Expenditure based on activity level
1RM Calculator
Calculate your one-rep max using Brzycki formula or RPE-based estimation
Calorie Deficit Calculator
Determine how many calories to eat for sustainable weight loss
Glycemic Load Calculator
Calculate blood sugar impact of foods for better energy and fat loss
Macro Calculator
Calculate optimal protein, carbs, and fats for your goals
Hydration Calculator
Calculate daily water needs and workout sweat rate
Goal Weight Calculator
Plan realistic timeline to reach your target weight with safe rates
Training Volume Calculator
Track workout volume load for progressive overload
Body Recomposition Calculator
See how muscle gain and fat loss impact your metabolism
MET Activity Calculator
Build precise TDEE from your actual daily activities
Protein Per Meal Calculator
Optimize protein distribution for muscle protein synthesis
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