BMI Calculator
Body Mass Index with metric and imperial units.
Use BMI Calculator to build healthier habits you can actually stick to — log it, track your progress and stay consistent day after day. It's perfect for anyone improving their fitness, hydration, sleep or daily routine. Free and private, with your data saved on your own device.
About BMI Calculator
BMI Calculator is a free, no-fuss way to stay on track with your health goals. Body Mass Index with metric and imperial units. Tracking the basics is one of the most reliable ways to build healthier habits, and this tool makes it quick and motivating. It runs in your browser with no sign-up, and your data stays on your own device — private by default.
How to use BMI Calculator
- 1Enter your details or log your activity in BMI Calculator.
- 2Check the result or your progress against your goal — it updates instantly.
- 3Come back daily to keep your streak going; your history stays saved on this device.
Why use BMI Calculator?
- ✓Anyone building healthier daily habits around movement, hydration or sleep.
- ✓People who want a simple log without handing data to a fitness app.
- ✓Free and private — your health data stays on your device, never uploaded.
Frequently asked questions
What does BMI Calculator do?+
Body Mass Index with metric and imperial units. Logging it regularly helps you see trends and stay consistent with your routine.
Is this medical advice?+
No. BMI Calculator is for general wellbeing and estimation only and isn't medical advice. Talk to a qualified health professional before changing your diet, exercise or medication.
Is BMI Calculator free to use?+
Yes, completely free with no hidden costs, no sign-up and no credit card. There are no usage limits — use it as often as you like.
Do I need an account or to install anything?+
No account, no download, no install. BMI Calculator is a web page that loads instantly and works on phones, tablets and computers — it even keeps working offline once the page has loaded.
Is my data private?+
Yes. BMI Calculator runs entirely in your browser — nothing you type is uploaded to a server. Where the tool saves your work, it stays on your own device in local storage, so your data never leaves your computer or phone.
Embed BMI Calculator on your website
Want BMI Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/bmi-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="BMI Calculator — ToolJolt" loading="lazy"></iframe>