FitCalc Studio
Instant BMR, TDEE, macro split, body fat Navy formula, and 1RM calculators. 100% private and science-backed.
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TDEE & BMR Calculator - Total Daily Energy Expenditure & Calorie Needs
Calculate your Basal Metabolic Rate (BMR) and Total Daily Energy Expenditure (TDEE) with Mifflin-St Jeor equation. Private, accurate, and instant.
Macro Calculator - Protein, Carbohydrates & Fats Split for Cutting & Bulking
Optimize your daily macronutrient split (Protein, Carbs, Fats) in grams and calories for fat loss, muscle growth, or ketogenic diets.
Body Fat Percentage Calculator - US Navy Circumference Method
Estimate your body fat percentage, lean body mass, and fat mass using official US Navy circumference equations. 100% private.
One Rep Max (1RM) Calculator - Epley & Brzycki Strength Formula
Calculate your one-rep max (1RM) for bench press, squat, and deadlift using proven Epley and Brzycki strength equations with training percentages.
Intermittent Fasting Timer - 16:8 & 18:6 Window Tracker
Track your intermittent fasting hours (16:8, 18:6, 20:4) with real-time countdown, local storage persistence, and metabolic phase visualizer.
Daily Water Intake Calculator - Recommended Hydration & Electrolytes
Calculate your ideal daily water consumption in liters and glasses based on body weight, workout intensity, and climate conditions.