Health and wellbeing calculators

Estimate daily calorie and water needs with simple, free planning tools.

Use consistent measurements

Enter current measurements using the units shown and choose the activity level that best reflects a normal week. Repeating the calculation under the same conditions makes changes easier to interpret.

What the estimates mean

The calculators use widely used population formulas to produce reference values for daily energy and water needs. They are useful for general planning but cannot account for every medical or environmental factor.

Not a medical assessment

Pregnancy, illness, medication, intense training and extreme weather may change individual needs. Do not use these estimates to diagnose or treat a condition; consult a qualified health professional when needed.