1. Introduction

Welcome to HDCalculator.com (“HDCalculator.com,” “HDCalculator,” “we,” “us,” or “our”).

HDCalculator.com is a free online website that provides calculators, mathematical tools, statistical tools, and other useful online utilities.

These Terms of Service (“Terms”) explain the conditions under which visitors may access and use our website, its calculators, tools, content, and related features.

HDCalculator.com is operated by ghassan riaz,.

By accessing or using our website, you agree to these Terms to the extent that your use legally constitutes acceptance under applicable law. Where applicable law requires a separate affirmative acceptance, these Terms will apply as permitted by that law.

If you do not agree to the applicable Terms, please discontinue use of the website.

Nothing in these Terms is intended to remove or restrict any legal rights that cannot lawfully be excluded.

2. Eligibility and Appropriate Use

You may use HDCalculator.com provided that your use complies with these Terms and all applicable laws.

If you are below the age at which you can legally enter into a binding agreement in your jurisdiction, you should use the website with the appropriate involvement of a parent or legal guardian where required by law.

You are responsible for ensuring that your use of the website is lawful in your location.

Our website is intended to provide accessible online tools for general informational, educational, mathematical, and research purposes.

3. Description of Our Services

HDCalculator.com provides free online calculators and tools designed to help visitors perform calculations and understand numerical results.

Our tools may include mathematical calculations, statistical calculations, sample-size calculations, and other utilities that we may introduce from time to time.

We may add new tools, update existing tools, change calculation methods, correct errors, modify website content, or discontinue particular features.

We do not guarantee that every tool or feature will remain available permanently.

4. Free Access and No Paid Transactions

HDCalculator.com currently provides its tools without charging visitors for access.

Our website does not currently sell physical products, digital products, subscriptions, or paid memberships, and it does not require visitors to make payments to use the available calculators.

No purchase or account registration is required to use the tools described on the website.

We may change our business model or introduce new services in the future. If any change affects the terms applicable to a particular service, we will provide the information or notices required by applicable law.

5. Use of Calculators and Results

Our calculators process the information entered by visitors and generate results using the methods, formulas, or logic implemented in each tool.

You are responsible for:

• Entering correct and appropriate information into the calculator.
• Reviewing the inputs and assumptions used for each calculation.
• Understanding the purpose and limitations of the relevant tool.
• Independently checking results before relying on them for important decisions.

Results may differ from results produced by other calculators because of differences in formulas, rounding methods, assumptions, data formats, or implementation.

You may use the numerical results generated by our tools for lawful personal, educational, research, or business purposes. This permission does not grant you ownership of our website’s original content, branding, design, or software.

6. Accuracy and Limitations of Results

We make reasonable efforts to provide useful and properly functioning calculators. However, we cannot guarantee that every calculation, formula, explanation, or result will always be accurate, complete, current, or suitable for your particular circumstances.

Errors may arise from incorrect inputs, software defects, mathematical limitations, rounding, outdated content, technical problems, or differences in calculation methods.

Some tools may rely on assumptions that are appropriate for general use but may not reflect every real-world situation.

For example, a sample-size calculation may estimate the number of responses needed for a selected confidence level and margin of error. It does not, by itself, eliminate sampling bias, non-response, poor survey design, or other research limitations.

You should verify important results using appropriate independent methods, authoritative sources, or qualified professionals where necessary.

Your use of any calculator or result is at your own discretion and should take account of these limitations.

7. No Professional Advice

Unless a particular page expressly states otherwise, the content and results provided by HDCalculator.com are for general informational, educational, mathematical, or research purposes.

They do not constitute individual professional advice, a professional assessment, or a guarantee of a particular outcome.

Our calculators should not be treated as a substitute for qualified professional advice or authoritative guidance where the consequences of an error may be significant.

If you use any current or future tool for a financial, tax, legal, medical, engineering, scientific, or other specialised purpose, you are responsible for obtaining appropriate verification and professional guidance where necessary.

Nothing in this section excludes professional obligations or legal rights that cannot lawfully be excluded.

8. Intellectual Property Rights

Unless otherwise indicated, the original text, explanations, articles, website design, branding, graphics, code, and other materials made available through HDCalculator.com are owned by or licensed to the website operator and are protected by applicable intellectual property laws.

You may access and use these materials for ordinary, lawful use of the website.

You may not, without appropriate authorisation or a legal right to do so:

• Copy or reproduce substantial portions of our original website content for republication.
• Republish or commercially redistribute our protected website code, design, or original material as your own.
• Remove copyright notices or other applicable ownership notices.
• Use our branding in a way that falsely suggests an official relationship, sponsorship, or endorsement.
• Infringe the intellectual property rights of HDCalculator.com or any third party.

These restrictions do not prevent uses permitted by applicable law, including any applicable copyright exceptions or limitations.

Nothing in these Terms gives us ownership of information you enter into a calculator. Your rights in your own materials remain subject to applicable law.

9. Acceptable and Prohibited Use

You agree to use HDCalculator.com responsibly and lawfully.

You must not:

• Use the website for unlawful, fraudulent, deceptive, or harmful purposes.
• Attempt to gain unauthorised access to the website, its hosting infrastructure, or related systems.
• Introduce viruses, malicious code, or other harmful software.
• Deliberately interfere with the availability, security, or normal operation of the website.
• Use automated requests in a manner that places an unreasonable burden on our systems or circumvents technical restrictions.
• Scrape, extract, reproduce, or redistribute substantial website content or data through automated means without permission or another applicable legal basis.
• Attempt to bypass security measures or exploit technical vulnerabilities.
• Use our website in a manner that infringes another person’s rights or violates applicable law.

These restrictions do not prohibit lawful activities such as ordinary browsing, reasonable use of our tools, accessibility-related activities, or permitted search-engine indexing.

We may take reasonable and lawful steps to investigate or address misuse.

10. Website Availability and Changes

We aim to keep HDCalculator.com useful and accessible, but we do not guarantee uninterrupted or error-free operation.

The website or any calculator may occasionally be unavailable because of maintenance, updates, hosting issues, security measures, software defects, network disruptions, or circumstances outside our control.

We may correct, update, restrict, replace, or discontinue a tool or other feature when reasonably necessary.

We will not promise advance notice of every routine technical change, but we will provide any notice required by applicable law.

11. Third-Party Advertisements and External Links

HDCalculator.com may display advertisements or contain links to third-party websites and services, depending on the arrangements and features enabled on the website.

The presence of an advertisement or external link does not necessarily mean that we endorse, recommend, or have verified the advertised product, service, organisation, or website.

Third-party websites, advertisers, and service providers operate independently and may have their own terms, privacy policies, and data-processing practices.

We do not control every aspect of their content, availability, security, or practices. To the extent permitted by applicable law, we are not responsible for independent third-party activities beyond our legal responsibility.

Visitors should review the relevant third-party terms and privacy information and exercise appropriate caution before interacting with external services or providing information to them.

Any advertising shown on HDCalculator.com does not change the fact that our calculators are provided without a required payment.

12. Privacy and Information Processing

Your use of HDCalculator.com is also subject to our Privacy Policy:

Privacy Policy: https://hdcalculator.com/privacy-policy-2/

We do not require visitors to create accounts, register profiles, or make payments to use our ordinary calculators.

However, the absence of registration or payment does not necessarily mean that no information is processed when the website operates.

Depending on the tool and the technical services enabled, information may be processed through the visitor’s browser, our hosting infrastructure, or third-party services.

Technical information, such as IP addresses, browser information, server requests, or security records, may also be processed where applicable.

If advertising, analytics, or other third-party services are enabled, those providers may process information in accordance with their respective technologies, policies, and applicable legal requirements.

Visitors should review our Privacy Policy for further details about information handling, cookies, advertising, and third-party services.

We will address applicable privacy and consent obligations in accordance with the laws that apply to the website and its activities.

Please avoid entering sensitive personal information into a calculator unless it is genuinely necessary and you understand how the relevant tool processes that information.

13. Disclaimer of Warranties

To the maximum extent permitted by applicable law, HDCalculator.com and its tools are provided on an “as available” basis.

We do not warrant that:

• Every calculator will always be available or operate without errors.
• Every result will be accurate, complete, or suitable for every purpose.
• All website content will always be current.
• The website will be free from every technical defect or interruption.
• A calculation will produce a particular outcome in your circumstances.

We make no guarantee that using our tools will achieve a particular personal, educational, research, professional, or business result.

This section is subject to applicable mandatory legal requirements. It does not exclude warranties, duties, or rights that the law does not allow us to exclude.

14. Limitation of Liability

You understand that free online calculators have practical and technical limitations and that important results should be independently checked.

To the maximum extent permitted by applicable law, HDCalculator.com and its operator will not be liable for indirect, incidental, special, consequential, or punitive losses, or for loss of profits, revenue, business opportunities, goodwill, or data, arising from or connected with the use of the website.

This limitation applies only to the extent such losses may lawfully be excluded or limited.

We are not responsible for decisions made solely on the basis of an unverified calculator result or for consequences arising from incorrect inputs, inappropriate assumptions, or a failure to obtain necessary independent advice, except where applicable law provides otherwise.

Nothing in these Terms excludes or limits liability where such exclusion or limitation is prohibited by law, including any liability that cannot legally be excluded for death or personal injury caused by negligence, fraud, or other non-excludable conduct.

Nothing in this section removes mandatory consumer rights or limits any remedy that applicable law requires to remain available.

15. Responsibility for Misuse

You are responsible for your own unlawful use of HDCalculator.com and for complying with these Terms.

Where permitted by applicable law, you may be responsible for direct losses or claims caused by your deliberate unlawful interference with the website, infringement of third-party rights, introduction of malicious code, or other serious misuse.

This section does not require visitors to compensate us for ordinary use of the website, our own unlawful conduct, or any liability that cannot legally be transferred to another person.

16. Restriction or Termination of Access

We may reasonably restrict or suspend access to the website, a calculator, or a related feature where necessary to:

• Protect the security or proper operation of the website.
• Address suspected unlawful activity or serious misuse.
• Respond to technical issues or security threats.
• Comply with a legal obligation.
• Carry out necessary maintenance or discontinue a feature.

We will act in accordance with applicable law and will provide any notice required by law.

As the website does not currently require user accounts, account-specific termination provisions are not ordinarily applicable.

17. Governing Law and Dispute Resolution

These Terms are governed by the laws of [Insert the Applicable Country and, if relevant, State or Province], subject to any mandatory legal requirements that apply to the website or its visitors.

Subject to applicable law, disputes arising from these Terms or the use of HDCalculator.com will be submitted to the competent courts of [Insert the Agreed Jurisdiction or Place].

Nothing in this section is intended to deprive consumers of mandatory protections, statutory remedies, or access to courts that cannot lawfully be excluded under applicable law.

The governing law and court provisions must be confirmed by the website operator before publication. They should reflect the operator’s actual legal circumstances and must not be selected on the assumption that one jurisdiction’s law governs every visitor worldwide.

18. Changes to These Terms

We may revise these Terms when our website, calculators, technical arrangements, business model, or legal obligations change.

When we make changes, we will publish the revised Terms on this page and update the “Last Updated” date.

Where required by applicable law, we will provide additional notice or seek affirmative acceptance of material changes.

Your continued use of the website after changes take effect may constitute acceptance only where that result is legally valid. Continued use does not replace any affirmative consent or notice required by applicable law.

We encourage visitors to review this page periodically.

19. Severability

If any provision of these Terms is held invalid, unlawful, or unenforceable, the remaining provisions will continue to apply to the extent permitted by law.

The affected provision will be interpreted or limited only as far as necessary to comply with applicable law, where legally possible.

Nothing in this section permits us to enforce a provision that applicable law makes unenforceable.

20. Entire Agreement

These Terms, together with the Privacy Policy and any additional terms expressly applicable to a particular tool or service, describe the terms governing the use of HDCalculator.com.

If a particular tool is subject to additional terms, those terms will apply to that tool to the extent they are properly disclosed and legally enforceable.

Nothing in this section overrides mandatory legal rights or obligations.

21. Contact Information

For questions about these Terms of Service, legal concerns, or other matters relating to HDCalculator.com, please contact:

Website: https://hdcalculator.com/
Website Owner or Operating Entity: Ghassan Riaz 
Contact Email: ghassanriaz@gmail.com

22. Effective Date

These Terms of Service become effective on the date stated at the beginning of this page, subject to applicable law.

Thank you for using HDCalculator.com