Terms of Use

By accessing or using the website percentagechangecalculator.co.uk (the "Service"), you confirm that you have read, understood and agree to be bound by these Terms of Use (the "Terms"). If you do not agree to these Terms, you must not access or use the Service.

These Terms constitute a legally binding agreement between you (the "User") and the operators of the Service (the "Operator", "we", "us"). By using the Service, you represent that you are at least 18 years of age or are accessing the Service under the supervision of a parent or legal guardian.

The Service is a free, web-based tool designed to calculate percentage change, percentage increase and percentage decrease between two numerical values, along with educational reference material including formulas, worked examples and frequently asked questions.

The Service is provided for general informational and educational purposes only. It is not intended to constitute professional financial, investment, legal, tax, accounting or other professional advice. You should consult a qualified professional before making decisions based on calculations performed using this Service.

All content on this Service — including but not limited to the text, layout, design, graphics, logos, icons, formula explanations, examples, code, software and the overall look and feel of the website — is the property of the Operator or its licensors and is protected by United Kingdom and international intellectual property laws.

You may not:

• Reproduce, republish, redistribute or sell any content from this Service without prior written permission.
• Use any trademarks, service marks or trade names displayed on the Service without the Operator's express written consent.
• Reverse engineer, decompile or disassemble any portion of the Service, including underlying source code or scripts.
• Frame, mirror or scrape the Service on any other website or platform.

Mathematical formulas and equations published on the Service (such as the percentage change formula) are public-knowledge mathematical facts and are not subject to copyright. You are free to use the underlying mathematics as you see fit.

Subject to your continued compliance with these Terms, the Operator grants you a personal, non-exclusive, non-transferable, revocable licence to:

• Access and use the Service for your own personal, educational or internal business purposes.
• Perform calculations and view, copy and print the results for your own records.
• Link to the Service from your own website, document or social media post, provided the link does not imply endorsement where none exists.
• Quote brief excerpts of educational content (e.g. the formula or examples) for non-commercial educational or commentary purposes, with a visible credit and link back to the Service.

You agree not to use the Service in any way that:

• Violates any applicable local, national or international law or regulation.
• Infringes the intellectual property, privacy or other rights of any third party.
• Attempts to gain unauthorised access to any portion of the Service, its server or related systems.
• Uses automated tools (bots, scrapers, crawlers) to extract data, content or results at scale, except for the purpose of search-engine indexing in compliance with the Service's robots.txt.
• Introduces viruses, malware, or any other malicious code that could disrupt or damage the Service.
• Uses the Service as part of any illegal, fraudulent, defamatory, harassing or otherwise harmful activity.
• Republishes results or content in a manner that misleads users into believing the Operator has endorsed a specific financial product, investment, or third-party service.

The Service does not require you to create an account or submit personal information in order to perform calculations. Values you enter into the calculator are processed in your browser and are not transmitted to or stored on the Operator's servers.

If you voluntarily contact the Operator via email or any contact form, any information you provide (such as your name, email address and message content) will be handled in accordance with the Operator's Privacy Policy.

You are solely responsible for any content you submit to the Service and for ensuring it does not breach any law or third-party right.

The Service is provided "as is" and "as available", with all faults and without any warranty of any kind. To the maximum extent permitted by applicable law, the Operator disclaims all warranties, whether express or implied, including but not limited to:

• Implied warranties of merchantability and fitness for a particular purpose.
• Warranties of accuracy, reliability, completeness or timeliness of results.
• Warranties that the Service will be uninterrupted, error-free, secure or free from harmful components.
• Warranties that any defect or error will be corrected.

While the Operator takes reasonable care to ensure calculations are mathematically correct, the Operator does not warrant that the results will be suitable for any specific purpose or free from computational or display errors. Users are encouraged to verify critical results against an independent source before relying on them.

To the fullest extent permitted by applicable law, in no event shall the Operator, its officers, directors, employees, affiliates or licensors be liable for any:

• Direct, indirect, incidental, special, consequential or punitive damages.
• Loss of profits, data, business or goodwill.
• Errors or inaccuracies in calculation results arising from input mistakes, browser behaviour or rounding.
• Downtime, service interruption or unavailability of the Service.
• Any damages arising from your reliance on, or misuse of, the Service.

This limitation applies regardless of the legal theory on which the claim is based and even if the Operator has been advised of the possibility of such damages.

Because some jurisdictions do not allow the exclusion or limitation of certain liabilities, the above limitations may not apply to you to the extent prohibited by law.

The Service contains links to third-party websites and resources — such as Wikipedia, Khan Academy and others — provided for educational convenience only.

The Operator has no control over the content, privacy practices or availability of those external sites and accepts no responsibility for them. The inclusion of a link does not imply endorsement. You visit third-party websites at your own risk and should review their terms and privacy policies.

Your use of the Service is also governed by the Operator's Privacy Policy and Cookie Policy, which are incorporated into these Terms by reference.

The Service may use cookies, local storage or similar technologies to remember preferences, measure traffic and improve user experience. You can control cookies through your browser settings, although some features of the Service may not function correctly if cookies are disabled.

The Operator reserves the right to modify these Terms at any time. When changes are made, the "Last updated" date at the top of this page will be revised accordingly.

It is your responsibility to review these Terms periodically for changes. Your continued use of the Service following the posting of updated Terms constitutes your acceptance of the revised Terms.

If a change is material (i.e. it significantly affects your rights or obligations), the Operator will endeavour to provide notice on the homepage or via other reasonable means at least 14 days before the change takes effect.

These Terms and any dispute arising out of or in connection with them shall be governed by and construed in accordance with the laws of England and Wales, without regard to its conflict-of-law principles.

You and the Operator agree that the courts of England and Wales shall have exclusive jurisdiction over any dispute or claim arising out of or relating to these Terms or the Service.

Before initiating court proceedings, both parties agree to attempt in good faith to resolve any dispute through direct communication or written notice to the contact email provided below for a period of at least 30 days.

If you have any questions, concerns or notices regarding these Terms, or if you wish to request permission for any use not covered by these Terms, please contact us using the details below: