FREE TOOLS

18 health calculators. No account needed.

Body composition, nutrition, activity, recovery, mental health, and weight management. Pick one and get an instant, generic result — nothing to sign up for.

Or create a free account to save results

Body Composition

BMI CalculatorEstimate your Body Mass Index from height and weight.Body Fat CalculatorEstimate body fat percentage using the US Navy circumference method.Ideal Weight CalculatorA population-average estimate of ideal body weight (Devine formula).Waist-to-Height RatioA simple, strong predictor of cardiometabolic risk.

Nutrition

Calorie CalculatorEstimate your daily calorie target based on your goal.Protein Intake CalculatorEstimate your daily protein target based on your goal.Water Intake CalculatorEstimate your daily hydration target.BMR CalculatorEstimate your Basal Metabolic Rate and maintenance calories.Macro CalculatorEstimate a protein/carb/fat split matched to your goal.

Activity

Steps to CaloriesEstimate calories burned from your daily step count.Sitting Damage CalculatorEstimate the health risk of your daily sitting time.Resting Heart RateSee where your resting heart rate falls.

Recovery

Sleep Cycle CalculatorFind the best bedtime or wake time based on 90-minute sleep cycles.

Mental Health

Stress Level TestA quick self-report screener for current stress level.Burnout Risk TestA quick self-report screener for burnout risk.

Weight Management

Weight Loss TimelineEstimate how long it will take to reach your goal weight.Weight Gain PlanEstimate how long it will take to reach your goal weight.Biological Age CalculatorEstimate how your lifestyle habits affect your biological age.

Health Analytics and AI Hubs

Beyond the calculators, two paid add-ons: Health Analytics follows the results you save over time, and the AI Hubs build plans around your answers.

AI HUBS

AI HubsNutrition, workout, sleep and stress plans built from a short questionnaire.

Health Analytics

Health AnalyticsTrends, findings, goals, a what-if simulator, reference ranges, a printable report and a weekly email, built from the results you save.Health ScoreOne score from your saved calculator results, with a radar chart across six areas of health. Part of the Health Analytics package.

Not sure what a term means? Open the Glossary →

Want your results saved so you can follow them over time? Create a free account.