Fitness & Health Calculators
These health calculators give you quick estimates for body mass index and pregnancy due dates so you can better understand key health numbers before your next appointment.
Results are intended for general information only and should always be discussed with a doctor, midwife or other qualified healthcare professional before you make medical decisions.
Choose a Health Calculator
- BMI Calculator – calculate your body mass index from height and weight and see which BMI range you fall into.
- Pregnancy Due Date Calculator – estimate your baby’s due date and current week of pregnancy using your last menstrual period or conception date.
How to Use Health Calculators Safely
Online health tools are most useful when they start a conversation rather than replace it. Use your BMI or pregnancy due date result as a starting point, then share it with your healthcare provider, who can interpret it in the context of your age, medical history and any existing conditions.
Avoid making major changes to medication, diet or exercise based only on online calculators. When in doubt, schedule a professional check‑up instead of self‑diagnosing.
Medical disclaimer: The information and tools on this page are for educational purposes only and are not a substitute for professional medical advice, diagnosis or treatment.
Health Calculator FAQs
No. They are educational tools that help you understand basic numbers before or after an appointment. Only a qualified healthcare professional can diagnose, treat or manage medical conditions.
Inputs such as your height, weight or dates are processed in your browser only for calculation. The tools are not designed to collect or store personal health information.
You can still get an estimate, but irregular cycles may make the due date less precise. In such cases, ultrasound measurements and guidance from your healthcare provider become even more important.
Children, athletes, older adults, pregnant people and anyone with chronic health conditions should treat BMI as a rough guide only and rely on personalised assessments from their healthcare team.