Calculate your Body Mass Index in seconds. Works in metric (cm/kg) and imperial (inches/lbs). See your BMI category and healthy weight range. Free, no signup, runs entirely in your browser.
Body Mass Index (BMI) is a simple calculation using a person's height and weight. The formula is BMI = weight (kg) ÷ height² (m²). It is widely used as a screening tool to identify whether a person is underweight, normal weight, overweight, or obese.
BMI is a useful starting point but doesn't account for muscle mass, bone density, age, or fat distribution. Athletes may have a high BMI due to muscle and still be very healthy. Always use BMI alongside other health indicators and consult a healthcare professional for a complete assessment.
CalcSmart is a free, fast, and mobile-friendly collection of everyday calculators covering health, personal finance, and general math. No sign-up, no downloads — just open and calculate.
Most calculator sites are cluttered, slow, and hard to use on a phone. CalcSmart is built to be the opposite — clean, instant, and works beautifully on any screen. We also support metric and imperial units so it works for everyone, everywhere.
Quick-access tools for BMI, Age, Unit Conversion, Tip, Discount, and Sales Tax are available instantly on the homepage — no searching needed.
All calculations are provided for informational and educational purposes only. They are not a substitute for professional medical, financial, or legal advice. Always consult a qualified professional before making important decisions based on calculator results.
Have a suggestion, found a bug, or want to request a new calculator? We'd love to hear from you at m2a2.mail@gmail.com or use the Contact page.
CalcSmart ("we", "us", or "our") is committed to protecting your privacy. This policy explains what information we collect, how we use it, and your rights regarding that information.
CalcSmart does not require account creation or login. We do not collect or store any personally identifiable information you enter into the calculators. All calculations happen locally in your browser.
We may collect the following non-personal data automatically:
This data is collected in aggregate form via analytics tools (such as Google Analytics) and cannot be used to identify you personally.
CalcSmart displays advertisements through Google AdSense. Google may use cookies and similar technologies to show ads based on your prior visits to this or other websites. You can opt out of personalized advertising by visiting Google Ad Settings.
CalcSmart itself does not set cookies. Third-party services (Google AdSense, Google Analytics) may set cookies in accordance with their own privacy policies. You can control cookies through your browser settings.
Some calculators offer optional voice input. This feature uses your browser's built-in speech recognition API. Audio is processed by your browser or its provider (e.g. Google Chrome) and is not recorded or stored by CalcSmart.
CalcSmart may contain links to external websites. We are not responsible for the privacy practices or content of those sites. We encourage you to review their privacy policies.
CalcSmart is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has provided personal information, please contact us and we will delete it promptly.
We may update this privacy policy from time to time. Changes will be posted on this page with an updated effective date. Continued use of CalcSmart after changes constitutes acceptance of the revised policy.
For privacy-related questions or requests, please contact us at m2a2.mail@gmail.com.
By accessing and using CalcSmart, you accept and agree to be bound by these Terms of Use. If you do not agree to these terms, please do not use the site.
CalcSmart is provided for informational and educational purposes only. You may use the site for personal, non-commercial purposes. You may not:
CalcSmart is provided "as is" without warranties of any kind. We do not guarantee the accuracy, completeness, or suitability of any calculation for any particular purpose. Calculator results are estimates only and should not be relied upon as professional advice.
CalcSmart and its owners shall not be liable for any direct, indirect, incidental, or consequential damages arising from your use of the site or reliance on its results.
Nothing on CalcSmart constitutes medical, financial, legal, or other professional advice. Always consult a qualified professional before making decisions based on calculator results.
We reserve the right to modify these terms at any time. Continued use of the site after changes constitutes acceptance of the updated terms.
Questions about these terms? Contact us at m2a2.mail@gmail.com.
Have a question, suggestion, or found a bug? We'd love to hear from you. Fill out the form below or email us directly at m2a2.mail@gmail.com.
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