Every conversion constant on this site is cross-referenced against NIST SP 811, ISO 80000, and the BIPM SI Brochure. If you find a formula error, want to suggest a new unit pair, or have engineering feedback, reach out — we review every message and fix verified errors within 24 hours.
Contact Email
rkingers776@gmail.com
For conversion error reports, suggestions for new unit converters, or engineering content feedback. Response within 48-72 hours.
Before You Write — Quick Answers
Q: A conversion result looks wrong. Is it a bug?
A: First, check your input. 99% of reported conversion errors turn out to be a unit mismatch — entering Fahrenheit when the label says Celsius, typing "1,000" with a comma (which JavaScript parses as 1), or confusing US gallons with Imperial gallons. Each converter shows its exact formula and coefficient on the page. If the formula is correct but your result still looks wrong, double-check your input unit — then email us.
Q: Can you add a converter for [specific unit pair]?
A: Yes — we review every request. Priority goes to unit pairs with strong search demand and clear engineering use cases. Include in your email: (1) the two units you need converted, (2) the exact conversion factor if you know it, and (3) the industry or context where you use this conversion. Requests with well-sourced constants get processed faster.
Q: I found a typo or broken link.
A: Thank you — please email the page URL and a short description. We fix content errors within 24-48 hours. If it's a conversion formula error, include your source (NIST publication number, ISO standard reference, or peer-reviewed paper) so we can verify and credit you in the changelog.
What Makes a Good Bug Report
A useful conversion error report includes: (1) the exact URL where you found the issue, (2) the input value you entered, (3) the result the converter displayed, (4) the result you expected, and (5) your source for the correct conversion factor. Reports that include all five items are typically verified and resolved in under 24 hours. Reports that say "your converter is broken" with no details take longer — we have 144 converters to check.
Our Verification Process
Every conversion constant on EnginStack is cross-referenced against at least two independent sources: primary metrology standards (NIST SP 811, ISO 80000, BIPM SI Brochure) and secondary engineering references (CRC Handbook, Kaye & Laby, engineering textbooks). When a user reports a formula error, we trace the constant back to its original definition before making any change. This three-step verification — user report, source confirmation, cross-reference check — means our conversion constants are among the most rigorously validated on the web. If you can cite a specific NIST publication number or ISO standard clause that contradicts our formula, we will correct it and acknowledge your contribution on the page.