Who Runs This Site
FuelMileageCalculator.com is built and maintained by James Will, a fuel-efficiency specialist with a B.E. in Mechanical Engineering and 12+ years of automotive data-analysis experience. James has personally tracked more than 250,000 miles of fuel consumption across gasoline, diesel, hybrid, and battery-electric powertrains, and is the author of every guide and calculation on this site. The methodology behind the calculator is documented in detail on the Fuel Mileage Calculation pillar page and is grounded in the same statistical techniques used in ISO 22514 process-capability analysis.
For all enquiries, bug reports, methodology questions, partnership opportunities, press requests, corrections, and general feedback, please email team@fuelmileagecalculator.com. The inbox is monitored daily by James directly. We do not currently offer phone support, and we cannot provide one-on-one debugging help for personal projects that are unrelated to our calculator tools.
Send a Message
The form below opens your default email client with a pre-filled message. If you prefer not to use a mail client, you can write directly to team@fuelmileagecalculator.com.
What to Include in a Bug Report
To help us resolve bugs quickly, please include the following details:
- Browser and version (e.g. Chrome 126.0.6478.234 on macOS 14.5, or Firefox 127.0.2 on Windows 11)
- Device (desktop, tablet, mobile; operating system)
- Steps to reproduce, the exact sequence of inputs you entered before the issue appeared
- Expected versus actual behaviour, what you thought would happen and what actually happened
- Screenshots or screen recordings if the bug is visual
- URL of the page where the issue occurred
For methodology questions, please include a link to the specific section of the relevant guide (for example, the "multi-cycle averaging" section of the accuracy optimisation guide) and a brief description of how your interpretation differs from the published material. We take corrections seriously and will publish a date-stamped note on the affected page if the methodology needs updating.
Frequently Asked Questions
Is FuelMileageCalculator.com really free?
Yes. The calculator, every guide, and every educational resource on this site is free to use, with no signup required. We support the site through unobtrusive advertising and through the consulting work that James does for fleet operators.
Do you store the data I enter into the calculator?
No. All calculation runs entirely in your browser. We never see, store, transmit, or analyse the numbers you type into the form. This is documented in detail in our Privacy Policy.
Can I use the calculator and guides for commercial work?
Yes. The methodology, the formulas, and the worked examples on this site are released for unrestricted use, including in commercial fleet-management software, internal reports, and academic publications. Attribution is appreciated but not required.
How do I report a methodology error or suggest an improvement?
Email team@fuelmileagecalculator.com with the article URL, the section that needs review, and a citation to the source you believe we should be using. We respond to substantive corrections within a week and update articles in the next release cycle.
How long does it take to hear back?
We aim to respond to every email within two business days. Bug reports that include a complete reproduction recipe are usually acknowledged the same day. Methodology debates that require us to dig into primary sources may take longer.