Sports Science & Body Calculators FitPath AI
Calculators built on proven exercise physiology and clinical nutrition science. 100% free, instantaneous, no account required.
BMI & Ideal Body Weight
Accurate body mass index with Asian (WPRO) and International (WHO) standards, waist-to-height ratio (WHtR), and ideal weight ranges.
TDEE & Calorie Deficit
Calculate total daily energy expenditure with Mifflin-St Jeor and Katch-McArdle, with science-backed deficit and surplus timelines.
Macronutrient Split
Calculate personalized grams of Protein, Carbohydrates, and Fats for High-Protein, Balanced, Low-Carb, or Keto protocols with per-meal splits.
1RM & Training Loads
Estimate one-rep max safely using Epley, Brzycki, and Lombardi formulas, with comprehensive %1RM percentage load tables and RPE scales.
Turn these numbers into your weekly plan
Calculators give you a snapshot. The FitPath AI mobile app turns your stats into an adaptive training schedule and dynamic grocery checklist.