Contact Us
Have a question, spotted an error, or want to suggest a new calculator? Fill out the form and we will get back to you.
Report a calculation error
If a calculator returns a result that seems wrong, describe the inputs you used and what result you expected. Include the page URL. We will verify the formula against the standard trade reference for that material and fix any error within 48 hours.
Suggest a new calculator
We build calculators based on actual search demand and user requests. If there is a material or project type you regularly need to estimate that we do not cover yet, let us know. Include the material type and what units you need in the result.
General questions
Questions about how a formula works, what waste factor to use for a specific project, or how to apply a result to a real job. All of these are welcome. We read every message and respond to most within one business day.
Response time
Most messages receive a reply within one business day. Calculation errors are prioritized and fixed as quickly as possible. We do not offer phone support; the contact form is the only supported channel.