Health, Fitness & Nutrition

BMI, BMR, TDEE, macro split, running pace, heart rate zones, calories burned, and hydration estimates.

Sleep Cycle & Circadian Wake-Up Calculator

Calculate optimal bedtimes and wake-up times aligned with natural 90-minute REM sleep cycles to prevent grogginess.

Calculate Total Daily Energy Expenditure (TDEE) and target protein/carb/fat gram distributions.

Estimate body fat percentage and lean muscle mass using the US Navy circumference method.

Calculate running pace per kilometer and mile, and predict endurance marathon finish times.

Calculate recommended daily water intake based on body weight, exercise, and climate.

Calculate theoretical 1RM maximum lifting capacity and percentage training working sets.

Calculate 5 individualized cardiovascular training heart rate zones using the Karvonen formula.

Calculate optimal daily water consumption in liters, fl oz, and 250ml glasses based on body weight, exercise, and climate.

Calculate 5 personalized cardio training zones (Zone 1 to Zone 5) using the Karvonen formula and Heart Rate Reserve (HRR).

Estimate body fat percentage, fat mass, and lean muscle mass using the official US Department of Defense circumference method.

Compare ideal body weight across Devine, Robinson, Miller, and Hamwi clinical medical dosing formulas for men and women.

Calculate Glycemic Load (GL) from Glycemic Index (GI) and available carbohydrate content per serving size.