Practical, evidence-based tools for everyday health questions. All calculations run through documented formulas with their methodology, limitations and references shown beside every result.
These calculators provide general information for adults. They are screening and estimation tools, not medical advice, diagnosis or treatment. Always discuss results with a qualified healthcare professional.
BMI calculator (adults)
Body Mass Index with WHO adult categories and an Indian-population risk note.
Open calculatorDaily calorie needs calculator
Estimated resting energy and daily needs using the Mifflin–St Jeor equation.
Open calculatorProtein intake calculator
Reference ranges in grams per kilogram of body weight, based on published dietary guidelines.
Open calculatorHealthy weight range calculator
The weight range corresponding to the WHO healthy BMI band (18.5–24.9) for your height.
Open calculatorWaist-to-height ratio calculator
Waist circumference divided by height — a simple indicator of central fat distribution.
Open calculatorWater intake estimator
A rough daily fluid range based on body weight and exercise — not a hydration prescription.
Open calculatorTemperature converter
Convert between Celsius, Fahrenheit and Kelvin, with normal-range context.
Open calculatorServing size converter
Convert nutrition-label values between "per 100 g" and your actual serving.
Open calculator