Contact & feedback
Spot something wrong? Want a calculator we don’t have? Tell us.
What we want to hear about
- An estimate that was way off — tell us the calculator, the inputs you used, and what you actually got quoted. Real-world data improves the model.
- A calculator we should add — what project, who it’s for, what scope decisions matter most.
- A bug or broken page — what page, what you did, what happened.
- A source we should add or update — public data, manufacturer pricing, code references.
- Partnership, press, or licensing inquiry — keep it short.
Send us a note
Email is the fastest way to reach us. Please include the calculator name and what you were trying to do — short notes are fine.