Health and Fitness Calculators

Using these health tools well

These calculators turn well-established public-health formulas into quick, private estimates you can use at home. They are useful for spotting trends, setting goals and preparing for a conversation with a clinician. What they cannot do is examine you, know your medical history, or replace a professional assessment. Read every result as a starting point rather than an answer.

Where to begin

For general wellbeing, the BMI and calorie calculators give you two useful baselines. If a goal is weight change, pair the weight-loss timeline with the macronutrient targets. The screening tools in the risk section are questionnaire-based and are designed to tell you when it is worth speaking to a doctor, not to label you with a condition.

Important safety note

Do not use these tools to diagnose or treat any condition, to adjust medication, or in place of emergency care. They are not suitable as the sole basis for a medical decision, and some are not appropriate during pregnancy, for children, or for people with specific conditions. If you feel unwell or a result concerns you, contact a qualified healthcare professional.