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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.

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Body Composition

BMI Calculator

Estimate your Body Mass Index from height and weight.

Body Fat Calculator

Estimate body fat percentage using the US Navy circumference method.

Ideal Weight Calculator

A population-average estimate of ideal body weight (Devine formula).

Waist-to-Height Ratio

A simple, strong predictor of cardiometabolic risk.

Nutrition

Calorie Calculator

Estimate your daily calorie target based on your goal.

Protein Intake Calculator

Estimate your daily protein target based on your goal.

Water Intake Calculator

Estimate your daily hydration target.

BMR Calculator

Estimate your Basal Metabolic Rate and maintenance calories.

Macro Calculator

Estimate a protein/carb/fat split matched to your goal.

Activity

Steps to Calories

Estimate calories burned from your daily step count.

Sitting Damage Calculator

Estimate the health risk of your daily sitting time.

Resting Heart Rate

See where your resting heart rate falls.

Recovery

Sleep Cycle Calculator

Find the best bedtime or wake time based on 90-minute sleep cycles.

Mental Health

Stress Level Test

A quick self-report screener for current stress level.

Burnout Risk Test

A quick self-report screener for burnout risk.

Weight Management

Weight Loss Timeline

Estimate how long it will take to reach your goal weight.

Weight Gain Plan

Estimate how long it will take to reach your goal weight.

Biological Age Calculator

Estimate how your lifestyle habits affect your biological age.

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