Health & Fitness Calculators

A health number is only useful when you understand what it actually means — and where it stops being useful. That's the idea behind this section: quick, private tools that give you a clear figure and, just as importantly, the context around it.

Right now you can check your BMI (Body Mass Index) in metric or imperial units with the World Health Organization categories shown alongside your result, estimate your daily calorie needs (TDEE), and get a body-fat estimate. Each is built the same way: the formula in plain sight, the assumptions stated, and the honest limits called out. More of what people ask for — ideal-weight ranges and water intake — is on the way.

Because this is health, we're careful about what these tools are and aren't. BMI, for example, is a rough screen, not a diagnosis — it doesn't know the difference between muscle and fat, and it reads differently for athletes, older adults and different body types. Everything here is information to help you ask better questions, not medical advice, and never a substitute for a conversation with a doctor.

Everything runs in your browser — your height, weight and the rest never leave your device, and nothing is stored or sent anywhere. Free, fast, and no sign-up. When a result surprises you, treat it as a prompt to look closer, not as a verdict.