Health Tools
Free health and fitness calculators. Results are estimates for informational purposes — not a substitute for professional medical advice.
BMI Calculator
Calculate your Body Mass Index and see your healthy weight range.
TDEE / BMR Calculator
Calculate your daily calorie needs based on activity level using Mifflin-St Jeor.
Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method.
Water Intake Calculator
Get a personalized daily water target based on weight, activity, and climate.
Macro Calculator
Calculate protein, carbs, and fat targets from your calorie goal and diet type.
Running Pace Calculator
Calculate pace per mile/km and projected finish times for any race distance.
Target Heart Rate Calculator
Find your 5 training zones using the Karvonen heart rate reserve method.
Sleep Cycle Calculator
Find optimal wake-up or bedtimes based on 90-minute sleep cycles.
Calories Burned Calculator
Estimate calories burned for 15 activities using MET values and body weight.
Pregnancy Due Date Calculator
Calculate your due date and track upcoming milestones by pregnancy week.
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