Health & Fitness Calculators

Fitness and nutrition advice is full of numbers — calories, macros, BMI, target heart rate — and getting them right starts with calculating them for your own body. ToolForge's health and fitness calculators cover the essentials: BMR and TDEE for your energy needs, calorie and macro targets, BMI, body fat, lean body mass and ideal weight, protein and water intake, calories burned, one-rep max, running pace, target heart-rate zones, plus age, due-date, and cycle estimates.

People starting a weight goal use them to set a realistic daily calorie target, lifters and runners use them to program training and nutrition, and the health-curious use them to understand their own numbers. They apply recognized formulas — Mifflin-St Jeor for metabolism, the US Navy method for body fat, standard MET values for exercise — and run privately in your browser. They are educational estimates, not medical advice, so pair them with a professional for anything consequential.