Contact
Quick answer
Use the form below for corrections, calculation errors, safety issues and partnership enquiries. Corrections to a figure or a safety statement get priority.
Send a message
Corrections to a calculation or a safety statement are the most useful messages this site gets. Please include the page and, if it is a calculation, the inputs you used.
What to include in a correction
- The page address.
- For a calculator, the exact inputs you entered and the answer you expected.
- For a material or settings figure, the source you are working from.
Common questions
What is the best thing to contact about?
A wrong number. If a calculation disagrees with your own measured result, or a safety statement is incomplete, that is the most valuable message this site receives. Include the page, the inputs you used and the figure you expected, because that turns a report into something immediately fixable.
Can you recommend a machine for my situation?
The build pages and calculators are built to answer that better than a message could, because they let you put your own numbers and constraints in. If your situation genuinely does not fit any of them, that gap is worth knowing about and is itself a useful thing to report.
Do you accept guest posts?
No. Every page here is written against a shared set of material data and editorial rules, and accepting outside articles would break both. Partnership and product enquiries are welcome through this form.
How quickly will you reply?
Corrections to calculations and safety content are handled first and everything else is answered as time allows. A message that includes the page URL and the specific figure in question can usually be acted on straight away, whereas a general enquiry may take longer.