Contact BuildNumerics
Report a calculator issue or a wrong formula or source, request a calculator, or send feedback. Use the form below and your message is sent straight to the BuildNumerics team.
What can we help with?
Pick the closest match — it sets the topic on the form.
How this form works
Your message is sent straight to the BuildNumerics inbox. Your name and email are used only to read and reply to it — never for marketing, and never shared.
What BuildNumerics can help with
Calculator corrections
A formula, constant, assumption or source that looks wrong. BuildNumerics won't ship math it can't stand behind, so these matter most.
Calculator requests
A tool you need on the job that isn't in the 97-calculator library yet — tell us what it should calculate.
Feedback
Anything that would make BuildNumerics faster or clearer to use on site or at the estimating desk.
General questions
How the calculators work, units, offline use, saved data — most of this is answered in the FAQ.
Find an answer now
Most questions are already answered. Check these before you write.