Terms of Service & Disclaimer

Last Updated: October 9, 2025

1. Agreement to Terms

These Terms of Service ("Terms") govern your access to and use of the Pack Year Calculator website (the "Website", "Service", "Tool"), operated by Pack Year Calculator ("we", "us", "our"). By accessing or using the Website, you agree to be bound by these Terms and our Privacy Policy.

Acceptance of Terms: Your continued use of the Website constitutes your acceptance of these Terms and any modifications we may make to them. If you do not agree with any part of these Terms, you must immediately discontinue use of the Website.

2. Medical Disclaimer

CRITICAL DISCLAIMER: Pack Year Calculator is provided for informational and educational purposes only. The information and calculations provided by this tool:

• Are NOT Medical Advice: Do not constitute professional medical advice, diagnosis, or treatment
• Are NOT a Substitute: Should not replace consultation with qualified healthcare professionals
• Are Estimates Only: Calculations are based on general medical research and may not apply to individual cases
• Require Professional Evaluation: All health decisions should be made in consultation with your physician
• Do Not Guarantee Accuracy: While we strive for accuracy, we make no guarantees about the precision of calculations

2.1 No Doctor-Patient Relationship

Use of this Website does not create a doctor-patient, therapist-patient, or any other healthcare professional relationship between you and Pack Year Calculator or any associated parties. We are not healthcare providers.

2.2 Consult Healthcare Professionals

Always seek the advice of your physician or other qualified health provider with any questions you may have regarding:

• Your smoking history and health risks
• Lung cancer screening eligibility
• Smoking cessation programs
• Any medical condition or health concerns
• Interpretation of calculator results

2.3 Never Disregard Medical Advice

Never disregard professional medical advice or delay seeking medical treatment because of something you have read on this Website or any results generated by the calculator. If you think you may have a medical emergency, call your doctor or emergency services immediately.

2.4 Individual Variation

Every individual's health situation is unique. Lung cancer risk factors extend beyond smoking history and may include:

• Genetic predisposition and family history
• Environmental exposures (radon, asbestos, air pollution)
• Occupational hazards
• Pre-existing medical conditions
• Age and overall health status

3. Description of Service

Pack Year Calculator is a free online tool that provides:

• Pack-Year Calculation: Estimates pack-years based on user input (years smoked × packs per day)
• USPSTF Guidelines: General information about lung cancer screening eligibility criteria
• Toxic Exposure Estimates: Approximate calculations of chemical exposure from cigarettes
• Financial Impact: Estimates of money spent on cigarettes
• Educational Information: General information about smoking-related health risks

3.1 Calculator Methodology

Our calculator uses the standard pack-year formula: Pack-Years = (Cigarettes per day ÷ 20) × Years smoked

Toxic exposure calculations are based on average values from peer-reviewed medical literature. Actual exposure varies by cigarette brand, smoking behavior, and individual factors.

3.2 USPSTF Screening Guidelines

The U.S. Preventive Services Task Force (USPSTF) recommends annual lung cancer screening for adults who:

• Are aged 50 to 80 years
• Have a 20 pack-year smoking history, and
• Currently smoke or have quit within the past 15 years

Note: These are general guidelines. Your healthcare provider may recommend screening based on additional individual risk factors.

4. User Eligibility and Conduct

4.1 Age Requirement

You must be at least 18 years of age to use this Website. By using the Website, you represent and warrant that you are 18 years of age or older. The Website is not intended for use by minors.

4.2 Acceptable Use

You agree to use the Website only for lawful purposes and in accordance with these Terms. You agree NOT to:

• Use the Website in any way that violates applicable laws or regulations
• Impersonate or attempt to impersonate Pack Year Calculator, employees, or other users
• Interfere with or disrupt the Website or servers connected to the Website
• Attempt to gain unauthorized access to any portion of the Website
• Use automated systems (bots, scrapers) without express written permission
• Reverse engineer, decompile, or disassemble any software used in the Website
• Remove, obscure, or modify any copyright, trademark, or proprietary notices
• Use the Website to transmit malicious code, viruses, or harmful materials

4.3 Prohibited Activities

The following activities are strictly prohibited:

• Providing false, misleading, or fraudulent information
• Harassing, threatening, or abusing other users or staff
• Posting or transmitting spam, advertising, or promotional materials without permission
• Attempting to circumvent security measures or access restrictions
• Collecting user information without consent
• Using the Website for any illegal or unauthorized purpose

5. Intellectual Property Rights

5.1 Ownership

The Website and its entire contents, features, and functionality (including but not limited to all information, software, text, displays, images, video, audio, design, selection, and arrangement) are owned by Pack Year Calculator, its licensors, or other content providers and are protected by United States and international copyright, trademark, patent, trade secret, and other intellectual property laws.

5.2 Limited License

Subject to your compliance with these Terms, we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Website for personal, non-commercial purposes. This license does not include:

• Any right to reproduce, distribute, or publicly display the Website content
• Commercial use or exploitation of the Website
• Derivative works based on the Website
• Data mining, scraping, or automated data collection

5.3 Trademarks

"Pack Year Calculator" and associated logos are trademarks of Pack Year Calculator. You may not use these marks without our prior written permission. Other trademarks, service marks, and logos used on the Website are the property of their respective owners.

5.4 User-Generated Content

Currently, the Website does not allow user-generated content submission. If this changes in the future, we will update these Terms accordingly.

6. Accuracy and Reliability of Information

6.1 No Warranties

While we strive to provide accurate and up-to-date information, we make no representations or warranties of any kind, express or implied, about:

• The accuracy, reliability, or completeness of calculator results
• The suitability of information for any particular purpose
• The current validity of medical guidelines referenced
• The applicability of general information to individual circumstances

6.2 Information Changes

Medical knowledge, screening guidelines, and recommendations evolve over time. Information on the Website may become outdated. We reserve the right to update, modify, or remove content without notice.

6.3 Third-Party Information

The Website may reference or link to third-party sources (USPSTF guidelines, medical research, health organizations). We are not responsible for the accuracy of external sources and do not endorse their content.

7. Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW:

7.1 Disclaimer of Warranties

THE WEBSITE IS PROVIDED ON AN "AS IS" AND "AS AVAILABLE" BASIS WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, OR COURSE OF PERFORMANCE.

7.2 No Liability for Damages

PACK YEAR CALCULATOR, ITS AFFILIATES, LICENSORS, SERVICE PROVIDERS, EMPLOYEES, AGENTS, OFFICERS, AND DIRECTORS SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT LIMITED TO:

• Personal injury or property damage resulting from use of the Website
• Loss of profits, revenue, data, or business opportunities
• Medical complications or health outcomes
• Delays or failures in seeking medical treatment
• Reliance on information or calculations provided by the Website
• Errors, mistakes, or inaccuracies in content or calculations
• Unauthorized access to or use of our servers or personal information
• Interruption or cessation of transmission to or from the Website
• Bugs, viruses, or other harmful components transmitted through the Website

7.3 Maximum Liability

IN NO EVENT SHALL OUR TOTAL LIABILITY TO YOU FOR ALL DAMAGES, LOSSES, OR CAUSES OF ACTION EXCEED THE AMOUNT YOU HAVE PAID US IN THE LAST SIX (6) MONTHS, OR, IF GREATER, ONE HUNDRED DOLLARS ($100).

Since the Website is provided free of charge, our liability is limited accordingly.

7.4 Medical Decisions

CRITICAL: We are not liable for any health outcomes, medical decisions, or consequences arising from:

• Your use or interpretation of calculator results
• Decisions to pursue or forego medical screening
• Delays in seeking medical attention
• Actions taken based on Website information
• Smoking cessation or continuation decisions

7.5 State Law Variations

Some jurisdictions do not allow the exclusion or limitation of incidental or consequential damages, so the above limitations may not apply to you. In such jurisdictions, our liability will be limited to the greatest extent permitted by law.

8. Indemnification

You agree to defend, indemnify, and hold harmless Pack Year Calculator, its affiliates, licensors, and service providers, and its and their respective officers, directors, employees, contractors, agents, licensors, suppliers, successors, and assigns from and against any claims, liabilities, damages, judgments, awards, losses, costs, expenses, or fees (including reasonable attorneys' fees) arising out of or relating to:

• Your violation of these Terms of Service
• Your use or misuse of the Website
• Your violation of any third-party rights, including intellectual property rights
• Your violation of any applicable laws or regulations
• Any content you submit or transmit through the Website (if applicable)
• Any false, misleading, or fraudulent information you provide

9. Website Availability and Modifications

9.1 No Guarantee of Availability

We do not guarantee that the Website will be available at all times or that it will be uninterrupted, secure, or error-free. We may experience hardware, software, or other problems that require maintenance or cause delays.

We reserve the right to:

• Suspend or discontinue the Website temporarily or permanently
• Perform scheduled or emergency maintenance
• Restrict access to certain features or the entire Website
• Modify or remove content without notice

9.2 Changes to the Website

We may update, modify, or discontinue any aspect of the Website at any time without notice. We may also impose limits on certain features or restrict access to parts or all of the Website without notice or liability.

9.3 Service Interruptions

We are not liable for any interruption of service, whether planned or unplanned, including but not limited to:

• Server maintenance or upgrades
• Technical difficulties or failures
• Third-party service provider issues
• Network connectivity problems
• Cyber attacks or security incidents
• Force majeure events

10. Third-Party Services and Links

10.1 Third-Party Websites

The Website may contain links to third-party websites, resources, or services that are not owned or controlled by Pack Year Calculator. These links are provided for convenience only.

We do not:

• Endorse or approve third-party content
• Control third-party websites or their content
• Assume responsibility for third-party privacy practices
• Guarantee the accuracy of external information
• Accept liability for third-party services or products

10.2 Third-Party Advertising

We use Google AdSense and other third-party advertising services. These services:

• May display advertisements on the Website
• Use cookies and tracking technologies
• Collect information about your browsing behavior
• Are governed by their own terms and privacy policies

We are not responsible for the content of advertisements or for any transactions between you and advertisers.

10.3 User Responsibility

When you access third-party websites or engage with third-party services through links on our Website:

• You do so at your own risk
• You should review their terms and privacy policies
• You assume full responsibility for any transactions
• You release us from any claims arising from third-party interactions

11. Privacy and Data Protection

Your use of the Website is also governed by our Privacy Policy, which is incorporated into these Terms by reference. Please review our Privacy Policy to understand our practices regarding the collection, use, and disclosure of personal information.

11.1 Data You Provide

Important: The calculator operates entirely in your browser. Data you enter (smoking history, age, etc.) is processed locally on your device and is NOT transmitted to our servers. This data is stored only in your browser's local storage and can be cleared at any time.

11.2 Analytics and Cookies

We use cookies and analytics services (Google Analytics, Google AdSense) to understand how visitors use the Website. By using the Website, you consent to our use of cookies as described in our Privacy Policy.

12. Disclaimer of Medical Warranties

MEDICAL DISCLAIMER - PLEASE READ CAREFULLY:

12.1 Educational Purpose Only

The Pack Year Calculator and all associated content are designed solely for educational and informational purposes. The tool provides general information about:

• Pack-year calculation methodology
• General USPSTF lung cancer screening guidelines
• Approximate toxic exposures from cigarette smoking
• Financial costs associated with smoking

12.2 Not a Diagnostic Tool

This calculator is NOT:

• A medical diagnostic tool
• A screening test for lung cancer or any disease
• A risk assessment tool for individual patients
• A substitute for clinical evaluation
• A replacement for professional medical judgment

12.3 Screening Decisions

Decisions about lung cancer screening should be made in consultation with your healthcare provider, considering:

• Your complete medical history
• Current health status and comorbidities
• Family history and genetic factors
• Environmental and occupational exposures
• Personal preferences and values
• Potential benefits and harms of screening

12.4 Calculation Limitations

Our calculations have important limitations:

• Averages Only: Based on average values that may not reflect individual variation
• Self-Reported Data: Accuracy depends on accurate user input
• Simplified Model: Does not account for cigarette type, inhalation depth, or other factors
• Historical Data: Based on research that may become outdated

12.5 Emergency Medical Situations

⚠️ EMERGENCY NOTICE:

If you are experiencing any symptoms that may indicate lung disease or cancer (persistent cough, chest pain, shortness of breath, coughing up blood, unexplained weight loss), SEEK IMMEDIATE MEDICAL ATTENTION. Do not rely on this calculator or any online tool for emergency medical decisions.

13. Termination

13.1 Termination by Us

We may terminate or suspend your access to the Website immediately, without prior notice or liability, for any reason whatsoever, including but not limited to:

• Breach of these Terms of Service
• Violation of applicable laws or regulations
• Fraudulent, abusive, or illegal activity
• Request by law enforcement or other government agencies
• Discontinuation or material modification of the Website
• Unexpected technical issues or security concerns

13.2 Termination by You

You may terminate your use of the Website at any time by simply discontinuing access to the Website. If you wish to delete any data stored locally in your browser, you may clear your browser cache and cookies.

13.3 Effect of Termination

Upon termination:

• Your right to use the Website will immediately cease
• All provisions of these Terms that by their nature should survive termination shall survive
• We are not obligated to retain any data or information
• You remain liable for any obligations incurred prior to termination

14. Governing Law and Jurisdiction

14.1 Applicable Law

These Terms shall be governed by and construed in accordance with the laws of the United States and the State of [Your State], without regard to its conflict of law provisions.

14.2 Dispute Resolution

Any disputes arising out of or relating to these Terms or the Website shall be resolved through:

1. Informal Negotiation: First, contact us to attempt to resolve the dispute informally
2. Mediation: If informal negotiation fails, the parties agree to attempt mediation
3. Arbitration: If mediation fails, disputes shall be resolved through binding arbitration

14.3 Arbitration Agreement

PLEASE READ THIS SECTION CAREFULLY: It affects your legal rights, including your right to file a lawsuit in court.

By agreeing to these Terms, you agree that:

• Any dispute will be resolved by binding arbitration
• You waive your right to a jury trial
• You waive your right to participate in a class action lawsuit
• Arbitration will be conducted by the American Arbitration Association (AAA)

14.4 Exceptions to Arbitration

Notwithstanding the above, either party may bring a lawsuit in court for:

• Intellectual property disputes
• Small claims court matters (if within jurisdiction)
• Injunctive or equitable relief

14.5 Class Action Waiver

YOU AND PACK YEAR CALCULATOR AGREE THAT EACH MAY BRING CLAIMS AGAINST THE OTHER ONLY IN YOUR OR ITS INDIVIDUAL CAPACITY AND NOT AS A PLAINTIFF OR CLASS MEMBER IN ANY PURPORTED CLASS OR REPRESENTATIVE PROCEEDING.

15. Changes to Terms of Service

We reserve the right to modify or replace these Terms at any time at our sole discretion. We will provide notice of material changes by:

• Posting the updated Terms on the Website
• Updating the "Last Updated" date at the top
• Displaying a prominent notice on the homepage (for significant changes)

Your continued use of the Website after any changes constitutes acceptance of the new Terms. If you do not agree to the modified Terms, you must stop using the Website.

15.1 Review Responsibility

It is your responsibility to review these Terms periodically. We encourage you to check this page regularly to ensure you are aware of any changes.

16. Severability

If any provision of these Terms is found to be invalid, illegal, or unenforceable by a court of competent jurisdiction:

• That provision shall be deemed severed from these Terms
• The remaining provisions shall continue in full force and effect
• The invalid provision shall be replaced with a valid provision that most closely matches the intent
• The validity and enforceability of other provisions shall not be affected

17. Waiver

No waiver by Pack Year Calculator of any term or condition set forth in these Terms shall be deemed a further or continuing waiver of such term or condition or a waiver of any other term or condition.

Any failure to assert a right or provision under these Terms shall not constitute a waiver of such right or provision. A waiver must be in writing and signed by an authorized representative.

18. Entire Agreement

These Terms of Service, together with our Privacy Policy and any other legal notices published by us on the Website, constitute the entire agreement between you and Pack Year Calculator concerning your use of the Website.

These Terms supersede and replace any prior agreements, understandings, or arrangements between you and us regarding the Website, whether written or oral.

19. Assignment

You may not assign, transfer, or delegate any of your rights or obligations under these Terms without our prior written consent. Any attempted assignment in violation of this provision shall be null and void.

We may freely assign, transfer, or delegate our rights and obligations under these Terms without restriction, including in connection with a merger, acquisition, reorganization, or sale of assets.

20. Force Majeure

We shall not be liable for any failure or delay in performing our obligations under these Terms due to circumstances beyond our reasonable control, including but not limited to:

• Acts of God (natural disasters, extreme weather, pandemics)
• War, terrorism, civil unrest, or government actions
• Labor disputes or strikes
• Internet or telecommunications failures
• Cyber attacks, hacking, or security breaches
• Power outages or infrastructure failures
• Supplier or vendor failures

21. Electronic Communications

By using the Website, you consent to receive electronic communications from us. You agree that all agreements, notices, disclosures, and other communications that we provide to you electronically satisfy any legal requirement that such communications be in writing.

22. No Professional Relationship

Use of the Website does not create any professional relationship between you and Pack Year Calculator, including:

• Doctor-patient relationship
• Healthcare provider-patient relationship
• Attorney-client relationship
• Fiduciary relationship
• Partnership or joint venture
• Agency or employment relationship

23. Smoking Cessation Disclaimer

While the calculator may provide information about the impacts of smoking, it is not a smoking cessation program or tool. If you are interested in quitting smoking:

• Consult Healthcare Providers: Speak with your doctor about cessation programs
• Professional Resources: Contact 1-800-QUIT-NOW (1-800-784-8669) for free support
• Evidence-Based Programs: Use proven cessation methods, not online calculators
• Medical Supervision: Quitting smoking may require medical support and monitoring

We do not provide smoking cessation advice, counseling, or treatment recommendations.

24. Accuracy of User Input

The accuracy of calculator results depends entirely on the accuracy of the information you provide. You are responsible for:

• Providing accurate smoking history information
• Correctly estimating years smoked and packs per day
• Understanding that results are only as accurate as your input
• Verifying your smoking history with healthcare providers

We cannot verify the accuracy of user-provided information and are not responsible for incorrect calculations resulting from inaccurate input.

25. Geographic Limitations

The Website is controlled and operated from the United States. We make no representation that the Website or its content is appropriate or available for use in other locations.

If you access the Website from outside the United States:

• You do so at your own risk
• You are responsible for compliance with local laws
• Medical guidelines may differ in your jurisdiction
• Screening recommendations may vary by country

26. Research and Statistical Use

The pack-year formula and toxic exposure calculations are based on:

• Peer-reviewed medical literature
• Average values from population studies
• General research data, not individual measurements
• Historical data that may not reflect current cigarette composition

Individual variation is significant. Your actual exposure may be higher or lower than calculated estimates.

27. No Endorsement

Reference to any products, services, processes, organizations, or other information does not constitute or imply endorsement, sponsorship, or recommendation by Pack Year Calculator.

We do not endorse:

• Specific screening facilities or healthcare providers
• Particular smoking cessation products or programs
• Third-party websites or services linked from our Website
• Advertisers or their products/services

28. Financial Impact Estimates

The financial calculations provided by the Website (total spent on cigarettes, potential investment value) are:

• Estimates Only: Based on user-provided cost per pack
• Simplified Models: Do not account for inflation, tax changes, or price variations
• Not Financial Advice: Should not be used for financial planning or investment decisions
• Illustrative Purpose: Intended to demonstrate financial impact, not predict actual outcomes

Investment return calculations assume a constant 8% annual return, which is not guaranteed and may not reflect actual investment performance.

29. Life Expectancy Estimates

Calculations regarding "days of life lost" or "years of life lost" are:

• Based on population-level statistical averages
• Do not predict individual outcomes
• Should not be interpreted as personal prognoses
• Are meant for educational illustration only

Individual health outcomes vary significantly and depend on numerous factors beyond smoking history.

30. Compliance with Laws

You agree to comply with all applicable local, state, national, and international laws and regulations in connection with your use of the Website. You are solely responsible for ensuring that your use complies with all applicable laws.

31. Digital Millennium Copyright Act (DMCA)

We respect the intellectual property rights of others. If you believe that any content on the Website infringes your copyright, please contact us with:

• Identification of the copyrighted work claimed to be infringed
• Identification of the material claimed to be infringing
• Your contact information
• A statement that you have a good faith belief that use of the material is not authorized
• A statement that the information in the notification is accurate
• Your physical or electronic signature

32. Feedback and Suggestions

If you provide us with any feedback, suggestions, or ideas about the Website ("Feedback"), you grant us a perpetual, irrevocable, non-exclusive, royalty-free, worldwide license to use, modify, and incorporate such Feedback without compensation to you.

33. Survival

The following sections shall survive termination of these Terms: Sections 2 (Medical Disclaimer), 5 (Intellectual Property), 7 (Limitation of Liability), 8 (Indemnification), 14 (Governing Law), and any other provisions that by their nature should survive.

34. Headings

The headings and subheadings in these Terms are for convenience only and have no legal or contractual effect.

35. Language

These Terms are written in English. Any translation provided is for convenience only. In the event of any inconsistency between the English version and any translation, the English version shall prevail.

36. Contact Information

If you have any questions, concerns, or complaints about these Terms of Service, please contact us:

37. Acknowledgment