Track BMI, calories, workouts, and health metrics. Tools for a healthier lifestyle.
ToolsHub's free health and fitness tools help you make informed decisions about your wellbeing. With 15+ calculators covering BMI, calories, macros, body fat, sleep cycles, heart rate zones, and more, you have a complete wellness toolkit at your fingertips — no app downloads or account creation required.
The Calorie Calculator uses the Mifflin-St Jeor equation to estimate your basal metabolic rate and total daily energy expenditure. The Sleep Calculator recommends optimal bedtimes and wake times based on 90-minute sleep cycles. The Heart Rate Zones Calculator personalizes training zones using the Karvonen method. And specialized tools like the Ovulation Calculator and Pregnancy Due Date Calculator support family planning.
Privacy is paramount when it comes to health data. Every tool processes your inputs locally in your browser — nothing is sent to any server or stored in any database. Use these tools with confidence as part of your personal health and fitness journey.
PopularCalculate your Body Mass Index.
Calculate daily calorie needs.
Estimate your body fat percentage using standard formulas.
PopularNewCalculate your ideal body weight using multiple scientific formulas. Find the healthy weight range for your height and frame.
Calculate the calorie deficit needed to reach your weight loss goals safely.
Calculate protein, carbs, fat.
Daily hydration needs.
Optimal sleep/wake times.
Training heart rate zones.
Estimate cardio fitness.
Calculate baby's due date.
Fertile window calculator.
Track menstrual cycle.
Calculate running pace.
Timer for mindfulness.
Common questions about health tools
Health and fitness calculators for better lifestyle choices. Track BMI, calories, macros, heart rate zones, and more with science-backed formulas.
Health tools are calculators and trackers that help you monitor fitness, nutrition, and wellness metrics. They calculate BMI, calorie needs, macro ratios, ideal weight, VO2 max, heart rate zones, and more using medically-recognized formulas.
Based on peer-reviewed scientific formulas (Mifflin-St Jeor for calories, Katch-McArdle for body fat, Cooper test for VO2 max), our health tools provide accurate estimates. All calculations happen locally, and we never store your health data.
Health data is deeply personal. Our tools keep everything private—weight, age, fitness metrics stay on your device. No accounts, no tracking, no judgment. Just science-based calculations to help you make informed health decisions.
Tracking BMI and body composition changesCalculating daily calorie needs for weight loss or muscle gainDetermining macro ratios for specific diet plansFinding ideal heart rate zones for cardio trainingEstimating VO2 max for fitness trackingCalculating water intake needs based on weight and activityMore free tool collections
