Get in Touch

Have a question about one of our calculators, found an error in a formula, or want to suggest a new tool? We read every message.

Send Us a Message

Response Times

We aim to respond to all inquiries within 1-2 business days. Calculator error reports are prioritized and typically addressed within 24 hours.

Business hours: Monday through Friday, 9:00 AM - 5:00 PM Eastern Time. Messages received outside business hours will be reviewed the next business day.

Common Inquiry Categories

Questions about calculator assumptions, waste factors, or formulas
Reporting discrepancies between calculator output and expected results
Requesting calculators for trades or project types not yet covered
Accessibility issues or problems using the site on specific devices
Privacy, data deletion, or cookie-related requests

Before You Write

If you are reporting a calculation error, it helps to include: the specific calculator you used, the input values you entered, the result the calculator returned, and the result you expected based on your experience or reference materials.

For feature requests, let us know what type of project the calculator would serve and what inputs and outputs would be most useful from your perspective.