Last updated: March 2026

OVERVIEW

This website is operated by ProEngCalc. Throughout the site, the terms “we”, “us” and “our” refer to ProEngCalc. ProEngCalc offers this website, including all information, tools and services available from this site to you, the user, conditioned upon your acceptance of all terms, conditions, policies and notices stated here.

By visiting our site and/or purchasing something from us, you engage in our “Service” and agree to be bound by the following terms and conditions (“Terms of Service”, “Terms”). These Terms of Service apply to all users of the site, including without limitation users who are browsers, customers, and contributors of content.

Please read these Terms of Service carefully before accessing or using our website. By accessing or using any part of the site, you agree to be bound by these Terms of Service. If you do not agree to all the terms and conditions of this agreement, then you may not access the website or use any services.

Our platform is hosted on Hostinger. We reserve the right to update, change or replace any part of these Terms of Service at any time. It is your responsibility to check this page periodically for changes.

SECTION 1 — ENGINEERING CALCULATIONS DISCLAIMER

SECTION 2 — ONLINE TERMS

By agreeing to these Terms of Service, you represent that you are at least the age of majority in your state or province of residence. You may not use our services for any illegal or unauthorized purpose nor may you, in the use of the Service, violate any laws in your jurisdiction. A breach or violation of any of the Terms will result in an immediate termination of your services.

SECTION 3 — GENERAL CONDITIONS

We reserve the right to refuse service to anyone for any reason at any time. You agree not to reproduce, duplicate, copy, sell, resell or exploit any portion of the Service without express written permission by us. The headings used in this agreement are included for convenience only and will not limit or otherwise affect these Terms.

SECTION 4 — ACCURACY OF INFORMATION

We are not responsible if information made available on this site is not accurate, complete or current. The material on this site is provided for general information only and should not be relied upon as the sole basis for making decisions without consulting primary, more accurate, or more complete sources of information. Any reliance on the material on this site is at your own risk. We reserve the right to modify the contents of this site at any time, but we have no obligation to update any information on our site.

SECTION 5 — MODIFICATIONS TO THE SERVICE AND PRICES

Prices for our products are subject to change without notice. We reserve the right at any time to modify or discontinue the Service (or any part or content thereof) without notice. We shall not be liable to you or to any third-party for any modification, price change, suspension or discontinuance of the Service.

SECTION 6 — SUBSCRIPTIONS AND BILLING

ProEngCalc offers a free tier and a paid Pro subscription. The Pro subscription is billed monthly ($9/month) or annually ($79/year) at the customer’s choice. Subscriptions automatically renew at the end of each billing period unless cancelled. You may cancel your subscription at any time through your account settings or by contacting us at contact@proengcalc.com. Cancellation takes effect at the end of the current billing period. Refunds are available within 7 days of initial purchase or renewal. Payments are processed securely through Stripe and may be made by Visa, Mastercard, American Express, Discover, Apple Pay, or Google Pay.

SECTION 7 — OPTIONAL TOOLS AND THIRD-PARTY SERVICES

We may provide you with access to third-party tools over which we neither monitor nor have any control. You acknowledge and agree that we provide access to such tools “as is” and “as available” without any warranties or conditions of any kind. Any use by you of optional tools offered through the site is entirely at your own risk. Third-party links on this site may direct you to third-party websites that are not affiliated with us. We are not responsible for the content, accuracy, or practices of any third-party websites.

SECTION 8 — USER SUBMISSIONS AND FEEDBACK

If you send us suggestions, feedback, or other materials by email or contact form, you agree that we may use any such comments for any purpose at any time without restriction or compensation. We are under no obligation to maintain any submissions in confidence or to respond to any comments.

SECTION 9 — PERSONAL INFORMATION

Your submission of personal information through the site is governed by our Privacy Policy, which is incorporated into these Terms of Service by reference.

SECTION 10 — PROHIBITED USES

You are prohibited from using the site or its content:

• For any unlawful purpose or to solicit others to perform unlawful acts
• To violate any international, federal, or state regulations, rules, or laws
• To infringe upon or violate our intellectual property rights or those of others
• To harass, abuse, defame, or discriminate against any person
• To submit false or misleading information
• To upload or transmit viruses or any malicious code
• To collect or track the personal information of others
• To spam, phish, scrape, or crawl the site
• To use the services to advertise or offer to sell goods and services
• To sell or otherwise transfer your account or profile to another party
• To interfere with or circumvent the security features of the Service

We reserve the right to terminate your use of the Service for violating any of the prohibited uses.

SECTION 11 — DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY

We do not guarantee that your use of our service will be uninterrupted, timely, secure or error-free. We do not warrant that the results obtained from the use of the service will be accurate or reliable. The service is provided “as is” and “as available” without any representation, warranties or conditions of any kind.

In no case shall ProEngCalc, our officers, employees, affiliates, agents, contractors, or service providers be liable for any injury, loss, claim, or any direct, indirect, incidental, punitive, special, or consequential damages of any kind, including without limitation lost profits, lost revenue, loss of data, or replacement costs, arising from your use of any of the service. Our total liability to you shall not exceed the amount paid by you to ProEngCalc in the twelve months preceding the claim.

SECTION 12 — INDEMNIFICATION

You agree to indemnify, defend and hold harmless ProEngCalc and our officers, directors, agents, contractors, licensors, service providers, and employees from any claim or demand, including reasonable attorneys’ fees, made by any third-party due to or arising out of your breach of these Terms of Service or your violation of any law or the rights of a third-party.

SECTION 13 — SEVERABILITY

In the event that any provision of these Terms of Service is determined to be unlawful, void or unenforceable, such provision shall nonetheless be enforceable to the fullest extent permitted by applicable law, and the unenforceable portion shall be deemed to be severed from these Terms of Service. Such determination shall not affect the validity and enforceability of any other remaining provisions.

SECTION 14 — TERMINATION

These Terms of Service are effective unless and until terminated by either you or us. You may terminate these Terms of Service at any time by notifying us that you no longer wish to use our services. We may terminate this agreement at any time without notice if in our sole judgment you fail to comply with any term or provision of these Terms of Service.

SECTION 15 — DISPUTE RESOLUTION

Any disputes arising from these Terms of Service shall first be subject to informal negotiations for a period of 30 days. If the dispute cannot be resolved through informal negotiation, it shall be resolved through binding arbitration in the United States in accordance with applicable arbitration rules. You agree that any dispute resolution proceedings will be conducted only on an individual basis and not in a class action. Claims must be brought within one (1) year of the cause of action arising.

SECTION 16 — GOVERNING LAW

These Terms of Service and any separate agreements whereby we provide you services shall be governed by and construed in accordance with the laws of the United States.

SECTION 17 — CHANGES TO TERMS OF SERVICE

You can review the most current version of the Terms of Service at any time on this page. We reserve the right to update, change or replace any part of these Terms of Service by posting updates to our website. Your continued use of or access to the website following the posting of any changes constitutes acceptance of those changes. We will notify users before updates take effect.