Tools directory

All health tools, beautifully organised.

A growing library of precise calculators and evidence-backed insights — searchable, filterable, and always free to start.

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30s

BMI Calculator

Body Mass Index — your weight-to-height ratio at a glance.

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45s

BMR Calculator

Discover the calories your body burns at complete rest.

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20s

Water Intake Calculator

Personal hydration target based on body and activity.

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Daily Calories Calculator

Maintenance, cut or bulk — find your number.

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Body Fat Calculator

Estimate body fat % using clinical-grade formulas.

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Ideal Weight Calculator

A healthy weight range tailored to your frame.

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Protein Calculator

Daily protein needs for muscle, recovery and longevity.

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Macro Calculator

Balance protein, carbs and fats for your goals.

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Sleep Calculator

Wake refreshed — find your optimal bedtime cycles.

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Heart Rate Calculator

Target heart-rate zones for cardio training.

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15s

Age Calculator

Precise age in years, months, days, and beyond.

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Waist to Height Calculator

A modern marker of cardiometabolic risk.

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Lean Body Mass Calculator

Calculate the weight of all your non-fat tissue.

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Body Surface Area Calculator

BSA for medical dosing and clinical reference.

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