Terms of Service

Welcome to BMI Calculator NHS (bmicalculatornhs.co.uk). These Terms of Service ("Terms") govern your access to and use of our website, including all BMI calculators, health tools, blog articles, and other content we provide.

By accessing or using our website, you agree to be legally bound by these Terms. If you do not agree with any part of these Terms, please discontinue use of our website immediately. These Terms apply to all visitors, users, and anyone who accesses or uses our services.

Please also read our Privacy Policy and Disclaimer, which are incorporated into these Terms by reference and form part of the agreement between you and BMI Calculator NHS.

1 Acceptance of Terms

By accessing, browsing, or using bmicalculatornhs.co.uk in any way, you confirm that you have read, understood, and agree to be bound by these Terms of Service and all applicable laws and regulations of England and Wales.

If you are using our website on behalf of a business, organisation, or other legal entity, you represent that you have the authority to bind that entity to these Terms. If you do not have such authority, or if you do not agree with these Terms, you must not use our website.

These Terms were last updated on 1 January 2026. We reserve the right to modify these Terms at any time. Your continued use of the website after changes are posted constitutes acceptance of the revised Terms.

2 About BMI Calculator NHS

BMI Calculator NHS is an independent health information website providing free, NHS-aligned body mass index calculators and related health tools for UK adults and families. We are committed to making NHS-standard health calculations accessible to everyone, free of charge.

Our tools include: the NHS BMI Calculator, Visual BMI Calculator, Child Growth Chart Calculator UK, Percentile Calculator UK, Baby Weight Percentile Calculator UK, and Ideal Weight Calculator UK. All tools are provided free of charge and are intended for informational purposes only.

3 Our Services and Tools

We provide the following free services through our website:

• BMI Calculator: Calculates Body Mass Index based on height and weight using NHS-aligned thresholds
• Visual BMI Calculator: Provides a BMI result with a visual body shape representation based on NHS categories
• Child Growth Chart Calculator UK: Uses NHS growth chart data to assess children's growth relative to UK population norms (ages 0–18)
• Percentile Calculator UK: Calculates height and weight percentiles for children using NHS reference data
• Baby Weight Percentile Calculator UK: Tracks infant growth from birth to 2 years using NHS centile charts
• Ideal Weight Calculator UK: Calculates a healthy weight range based on NHS BMI guidelines
• Health Blog: Evidence-based articles on weight management, BMI, and NHS health guidelines

We reserve the right to modify, suspend, or discontinue any of our services at any time without notice. We will not be liable to you or any third party for any modification, suspension, or discontinuation of services.

4 Permitted Use

You are permitted to use BMI Calculator NHS for the following purposes:

• Personal, non-commercial use of our BMI calculators and health tools
• Calculating your own BMI or that of family members for personal health awareness
• Reading our health blog articles for educational and informational purposes
• Sharing links to our website on social media or other platforms
• Healthcare professionals using our tools as a supplementary reference (not as a primary clinical tool)
• Students and researchers referencing our publicly available health information
• Teachers and educators referencing our content for health education purposes

Use of our website is subject to these Terms and all applicable UK laws. We reserve the right to refuse or terminate access to any user who violates these Terms.

5 Prohibited Use

You agree that you will not use BMI Calculator NHS for any of the following prohibited purposes:

• Any unlawful purpose or in violation of any applicable UK or international laws or regulations
• Attempting to gain unauthorised access to any part of our website, servers, or related systems
• Transmitting any harmful, offensive, defamatory, obscene, or malicious content
• Reproducing, copying, distributing, or selling any part of our website content without our express written permission
• Using automated tools, bots, scrapers, or crawlers to extract data from our website beyond normal search engine indexing
• Introducing viruses, trojans, worms, or any other malicious software to our website
• Interfering with or disrupting the integrity or performance of our website or its servers
• Impersonating BMI Calculator NHS or misrepresenting your relationship with us
• Using our website or brand name in a way that implies official NHS affiliation or endorsement
• Collecting or harvesting personal data from other users of our website
• Using our health tools for commercial purposes without our written consent
• Circumventing any security or access control measures on our website

We reserve the right to take legal action for any breach of these prohibited use provisions, including seeking injunctive relief and claiming damages. We may also report serious breaches to relevant law enforcement authorities.

6 Medical Disclaimer

BMI is a screening tool — it is not a diagnostic measure. A BMI result that falls outside the "healthy" range does not necessarily indicate the presence of a health condition, nor does a BMI within the "healthy" range guarantee that a person is in good health. BMI has known limitations and may not accurately reflect health risk for all individuals, including:

• Highly muscular athletes and bodybuilders (BMI may overestimate adiposity)
• Older adults (BMI may underestimate body fat percentage due to muscle loss with age)
• Pregnant women (BMI is not appropriate for use during pregnancy)
• Children and teenagers (adult BMI thresholds do not apply — use our child-specific tools)
• People of South Asian, Chinese, or Black African heritage (NHS applies lower BMI thresholds)

Always consult your GP or a qualified healthcare professional before making any changes to your diet, exercise routine, or lifestyle based on BMI results or any other information from this website. If you are concerned about your weight or health, please seek professional medical advice promptly.

Our child growth tools — including the Child Growth Chart Calculator UK and Baby Weight Percentile Calculator UK — are intended to support parental awareness and should always be used in conjunction with regular check-ups with a GP, health visitor, or paediatrician. They are not a substitute for professional clinical assessment.

7 Accuracy of Information

We are committed to providing accurate, up-to-date information that aligns with current NHS and CDC health guidelines. Our BMI calculations use the standard metric formula (BMI = kg/m²) with NHS category thresholds as published by NHS England. Our child growth charts use UK reference data from the Royal College of Paediatrics and Child Health (RCPCH).

However, we make no warranties or representations — express or implied — about the accuracy, completeness, reliability, suitability, or availability of any content, products, services, or related information on this website.

Health guidelines, NHS thresholds, and clinical recommendations can change over time. While we endeavour to keep our content current, we recommend always referring to official NHS sources (nhs.uk) for the most up-to-date clinical guidance.

Any reliance you place on information from this website is strictly at your own risk. We exclude all liability and responsibility arising from any reliance placed on our content by any visitor to our website, or by anyone who may be informed of any of its contents.

8 Intellectual Property

All content on bmicalculatornhs.co.uk — including but not limited to written text, blog articles, graphics, logos, icons, images, calculator designs, HTML code, CSS stylesheets, JavaScript code, and visual layouts — is the original intellectual property of BMI Calculator NHS and is protected by UK copyright law and international copyright treaties.

The following uses are strictly prohibited without our express written permission:

• Copying or reproducing our website content, in whole or in part
• Republishing, broadcasting, or redistributing our content on any other platform
• Creating derivative works based on our content
• Using our logos, brand name, or visual identity in any way that implies affiliation or endorsement
• Selling, licensing, or commercially exploiting any part of our content

Fair Use and Permitted References

You may reference or quote brief excerpts from our content for non-commercial educational purposes, provided you clearly attribute the content to BMI Calculator NHS and include a link to the original page. For all other uses, please contact us at info@bmicalculatornhs.co.uk to request permission.

Third-Party Intellectual Property

Our website references NHS guidelines and clinical data, which remain the intellectual property of their respective owners. NHS growth chart data is used in accordance with RCPCH licensing terms. We are not affiliated with or endorsed by NHS England, RCPCH, or any other referenced organisation.

9 User Content

Our website does not currently allow users to post, upload, or submit content publicly. Any communication you send us — including contact form submissions and emails — is treated as private correspondence and is handled in accordance with our Privacy Policy.

By sending us a message or enquiry, you confirm that the content of your communication is accurate, does not infringe any third-party rights, and does not contain any unlawful, offensive, or harmful content. We reserve the right not to respond to communications that violate these conditions.

10 Third-Party Links and Services

Our website contains links to third-party websites, including NHS.uk, CDC.gov, and other health information resources. These links are provided for your convenience and to supplement the information on our site.

We have no control over the content, privacy policies, or practices of third-party websites. We accept no responsibility for any content, products, or services available on or through external sites. The inclusion of a link does not imply our endorsement of the linked website or any association with its operators.

We also use the following third-party services to operate our website — please refer to their respective terms and privacy policies:

• Google Analytics: Website analytics — Google Terms
• Google AdSense: Advertising — Google Terms
• Cloudflare: Performance and security — Cloudflare Terms

11 Advertising

BMI Calculator NHS displays advertisements served by Google AdSense to help fund the ongoing operation and development of our free health tools. By using our website, you acknowledge that advertisements may be displayed on our pages.

We do not control the specific advertisements shown by Google AdSense — these are selected automatically based on page content and, with your consent, your browsing activity. We do not accept responsibility for the content of third-party advertisements.

You can manage your Google advertising preferences, including opting out of personalised advertising, at adssettings.google.com. Opting out of personalised ads does not prevent ads from being displayed — it means the ads shown will be less relevant to your interests.

Advertisers do not influence our editorial content, health information, or calculator results in any way. Our NHS-aligned health guidance is independent of our advertising relationships.

12 Limitation of Liability

To the maximum extent permitted by applicable law, BMI Calculator NHS, its operators, employees, and contributors shall not be liable for any:

• Direct damages arising from your use of or inability to use our website or tools
• Indirect or consequential damages including loss of profits, data, or goodwill
• Health outcomes resulting from decisions made based on information from our website
• Errors or inaccuracies in any content provided on our website
• Interruptions to our service due to technical issues, maintenance, or circumstances beyond our control
• Third-party content accessible through links on our website
• Unauthorised access to your data resulting from third-party actions beyond our reasonable control

Nothing in these Terms shall limit or exclude our liability for death or personal injury caused by our negligence, fraud or fraudulent misrepresentation, or any other liability that cannot be excluded or limited under English law.

Our total liability to you in connection with these Terms shall not exceed £100 in any 12-month period. This limitation reflects the free nature of our services.

13 Indemnification

You agree to indemnify, defend, and hold harmless BMI Calculator NHS and its operators from and against any claims, liabilities, damages, losses, and expenses — including reasonable legal fees — arising out of or in connection with:

• Your violation of these Terms of Service
• Your use of our website in a manner not permitted by these Terms
• Your violation of any applicable laws or regulations
• Your infringement of any intellectual property or other rights of any third party
• Any content you submit to us that causes harm to a third party

14 Termination of Access

We reserve the right, at our sole discretion, to suspend or terminate your access to all or any part of our website at any time, with or without notice, for any reason — including but not limited to a breach of these Terms of Service.

Upon termination, all licences and rights granted to you under these Terms will immediately cease. Provisions of these Terms that by their nature should survive termination — including intellectual property, limitation of liability, indemnification, and governing law — will continue to apply.

15 Changes to These Terms

We reserve the right to update or modify these Terms of Service at any time. When we make material changes, we will update the "Last Updated" date at the top of this page.

It is your responsibility to check these Terms periodically for changes. Your continued use of our website after we post changes constitutes your acceptance of those changes. If you do not agree to the revised Terms, please stop using our website.

Previous versions of these Terms are available on request by contacting us at info@bmicalculatornhs.co.uk.

16 Governing Law and Jurisdiction

These Terms of Service and any disputes arising from your use of our website shall be governed by and construed in accordance with the laws of England and Wales, without regard to its conflict of law provisions.

You agree that any legal proceedings arising from or related to these Terms or your use of our website shall be subject to the exclusive jurisdiction of the courts of England and Wales. If you are accessing our website from outside England and Wales, you are responsible for compliance with local laws to the extent they are applicable.

Nothing in this clause affects your statutory rights as a UK consumer under applicable consumer protection legislation.

17 Contact Us

If you have any questions about these Terms of Service, wish to report a violation, or need to request permission for any use of our content, please contact us:

• Email: info@bmicalculatornhs.co.uk
• Website: bmicalculatornhs.co.uk
• Legal jurisdiction: England and Wales

We aim to respond to all legal and terms-related enquiries within 10 business days.