Fitness Guides
In-depth guides to help you understand the science behind our calculators and make the most of your fitness journey.
Complete TDEE Guide
Learn everything about Total Daily Energy Expenditure - what it is, how to calculate it, and how to use it for your fitness goals.
Macro Calculator Guide
Understand macronutrients and how to calculate your optimal protein, carbs, and fat intake for different goals.
Body Fat Calculator Guide
Master the US Navy method for estimating body fat percentage and understand what your results mean.
Why Read Our Guides?
Science-Based
All our guides are based on peer-reviewed research and established scientific formulas.
Easy to Understand
Complex concepts explained in simple terms with practical examples.
Actionable Advice
Practical tips you can apply immediately to reach your fitness goals.
Ready to Calculate?
Put your knowledge into practice with our free fitness calculators.