Contact us.
Found a calculation error, have a question, or want to suggest a new tool? We read every message.
Ways to reach us
Response time
We typically respond within 1–2 business days.
What to include
- Which calculator you're using
- The inputs you entered
- What result you expected vs. what you got
Common questions
Is LumberMathz free to use?
Yes — all calculators are free, with no signup required.
Can I request a new calculator?
Absolutely. Email us the type of project and what inputs/outputs would be most useful. We prioritize based on demand.
Are the results guaranteed?
No. These are estimates based on typical US residential construction practices. Always verify with your local building codes and a qualified contractor before purchasing.
How do I report a calculation error?
Email us with your inputs and expected result. We will investigate and correct errors quickly.