Calculateur d'IMC Gratuit en Ligne
Calculez votre Indice de Masse Corporelle et connaissez votre catégorie de poids.
Frequently Asked Questions
What is a normal BMI?
A BMI between 18.5 and 24.9 is considered normal/healthy weight. BMI under 18.5 is underweight, 25–29.9 is overweight, and 30 or above is obese.
How do I calculate BMI in kg and cm?
BMI formula (metric): BMI = weight (kg) ÷ height² (m²). Convert cm to m first by dividing by 100. For example, 70 kg at 175 cm: BMI = 70 ÷ (1.75 × 1.75) = 22.9.
What is the BMI formula for lbs and inches?
BMI formula (imperial): BMI = (weight in lbs × 703) ÷ height² (inches²). For example, 154 lbs at 69 inches: BMI = (154 × 703) ÷ (69²) = 22.7.
Is the Calculateur d'IMC free to use?
Yes, the Calculateur d'IMC on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the Calculateur d'IMC work?
Calculez votre Indice de Masse Corporelle et connaissez votre catégorie de poids. No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the Calculateur d'IMC?
No installation needed. The Calculateur d'IMC runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the Calculateur d'IMC?
Completely safe. The Calculateur d'IMC processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the Calculateur d'IMC work offline?
After the page loads for the first time, the Calculateur d'IMC works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.
How accurate are the Calculateur d'IMC calculations?
The Calculateur d'IMC uses clinically validated formulas such as the Mifflin–St Jeor or Harris–Benedict equations where applicable. Results are population-based estimates and can differ from measured values by 10–20% for individuals with atypical body composition. See our Methodology page for full formula sources and references. Consult a qualified healthcare professional before making medical or dietary decisions.
Which formula does the Calculateur d'IMC use?
The Calculateur d'IMC uses an established, peer-reviewed formula endorsed by leading health organisations such as the WHO, CDC, or NIH where applicable. The specific formula is chosen for its validated accuracy across diverse adult populations under normal conditions.
Does the Calculateur d'IMC work on all browsers?
Yes. The Calculateur d'IMC is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the Calculateur d'IMC?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.