Contact
One person runs this site, and that person reads the email. Corrections, questions and calculator requests are all welcome.
Email me
The way to reach me is email. There is no contact form on this site on purpose: a form would mean your message passing through a server and a database, and this site is built so that nothing you type goes anywhere. An email link keeps it simple — your message travels from your mail app to my inbox, and nowhere else gets involved.
I am Ian Welkins, the developer behind this site, and every message lands with me personally.
What to write about
Three kinds of message cover almost everything that arrives.
A wrong number. If a result, a table or a worked example looks wrong, that is the most valuable email I can get. Include the page, the numbers you entered and what you expected. The quickest route is the report-an-error page, which asks for exactly those details — but a plain email with the same details works just as well. I check every report against the published source myself.
A question about a formula. If a result surprised you and you want to know how it was reached, check the Methodology page first — every formula on the site is printed there with its source and a worked check. If the answer is still not clear, write and tell me which step lost you; unclear explanations get rewritten.
A calculator request. If there is a treadmill question this site does not answer, describe the question and give an example of the numbers you would enter. The site stays treadmill only, but inside that subject, reader requests are how new tools get chosen.
Response note
This is a small, one-person site, and I fit the inbox around building and maintaining the fleet. I read everything, but replies can take a few days — longer when a correction needs checking against a source document before I answer. Error reports get priority, because a wrong number affects everyone who uses the page after you, and corrections are quickest via the report-an-error page. One thing I cannot do by email: I am a developer, not a coach or a medical professional, so I cannot build training plans or advise on training through pain or injury. For questions about privacy, the privacy policy explains what the site does and does not collect, and the same email address reaches me about it.
Contact questions
How do I report a wrong result?
Use the report an error page and include the page address, the numbers you entered, the result the calculator gave you and the result you expected. Reports with those four details can be checked against the source formula straight away, and genuine errors are fixed and logged with a date.
Can you add a calculator?
You can ask, and requests from readers are how several tools in the fleet got built. The site stays treadmill only, so a request needs to be a treadmill question the current tools do not already answer. Send the question you want answered and an example of the numbers you would enter.
Do you offer coaching or training plans?
No. This site is tools only. It does the arithmetic of pace, speed, incline and zones from published formulas, but it does not build training plans, review your running or give medical guidance. A coach who knows your running is the right person for those questions.