Contact

Questions, corrections, or feedback — we read everything.

Reach us

Email us at contact@onlineasphaltcalculator.com. We especially welcome corrections to formulas, defaults, or data — accuracy is the whole point of this site.

What's useful to include

• The page or calculator you're asking about.
• For a data correction: the figure, the source, and the date.
• For a feature request: the project type and what you were trying to do.

Please don't send personal or property-identifying details — we don't need your address to answer a question about a formula. See our privacy policy.