Health & Fitness Calculators
Evidence-based health estimators for body mass index, baseline caloric needs, TDEE, and fitness macronutrient goals.
Explore Health Calculators(12)
BMI (Body Mass Index) Calculator
Calculate your Body Mass Index (BMI) using WHO standard metric or imperial formulas.
BMR (Basal Metabolic Rate) Calculator
Estimate your Basal Metabolic Rate (BMR) calories burned per day at rest.
TDEE (Total Daily Energy Expenditure) Calculator
Calculate your Total Daily Energy Expenditure (TDEE) based on activity multipliers.
Macronutrient Ratio Calculator
Distribute daily target calories into optimal grams of protein, carbs, and fats.
Calorie Burn & Exercise Calculator
Calculate calories burned during workouts based on MET intensity and body mass.
Target Heart Rate Zone Calculator
Determine your maximum heart rate and target training zones for optimal fitness.
Body Fat Percentage Calculator
Calculate body fat % using circumference measurements of waist, neck, and hips.
Daily Water Intake Calculator
Determine recommended fluid intake in liters and glasses per day.
One-Rep Max (1RM) & Training Percentage Calculator
One-rep max calculator using the Epley and Brzycki formulas. Estimates your 1RM for bench, squat, deadlift, overhead press or row, plus a full percentage-based training load table.
FFMI & Lean Body Mass Calculator
Fat-Free Mass Index calculator. Computes FFMI, height-normalised FFMI, lean body mass and fat mass, with categories from below average through to the natural muscular potential threshold.
Pregnancy Due Date & Gestational Age Calculator
Pregnancy due date calculator using Naegele's rule with cycle-length adjustment, or an IVF blastocyst transfer date. Returns your EDD, current gestational age, conception date and milestone dates.
Blood Alcohol Content (BAC) Calculator — Widmark Formula
Blood alcohol content calculator using the Widmark formula. Estimates BAC from Australian standard drinks, body weight, gender and elapsed time, with hours to reach 0.05 and zero.