About WeightBMI
WeightBMI is a free site, in Arabic and English, that brings the most-used weight and health calculators together in one place. The aim is a clear number, with an explanation of how it is calculated and where it stops being useful — no sign-up or subscription.
The tools
- BMI Calculator
BMI and adult category from height and weight.
- BMI Chart
BMI for any height and weight, in kg/cm and lb/ft.
- Ideal Weight Calculator
Healthy weight range for your height, plus common reference formulas.
- Body Fat Calculator
An estimate of body fat with the US Navy tape-measure method.
- Calorie Calculator
Estimated BMR and TDEE with the Mifflin–St Jeor equation.
- Water Intake Calculator
A general, weight-based estimate of daily fluids.
- Exercise Calorie Calculator
Calories burned in common activities from MET values.
- Weight Converter
Pounds to kilograms and back.
How the calculations work
- Each calculator uses a published formula, and we list its source, where it applies and its limits.
- Results are estimates for adults aged 18 and over — not a diagnosis or a treatment plan.
- When a formula does not apply (for example, ideal-weight formulas below 152 cm), we say so and do not show its number.
- Calculations run in your browser; no name or email is needed to use any tool.
Corrections policy
When an error in a formula, number or wording comes to light, we check it against the published source, correct the page, and update the review date on the methodology page and the modified date of the affected pages. A calculator result is never changed without the change being reflected on the methodology page.
Learn more
The information on this site is educational and does not replace advice from a doctor or dietitian.