Disclaimer

The calculators on this site provide material estimates based on standard industry formulas and typical coverage rates. Actual requirements vary with site conditions, product brands, waste and workmanship — always confirm quantities with your supplier and add appropriate waste margin before purchasing. For structural work, consult a licensed professional. We are not responsible for over- or under-ordering based on these estimates.

Accuracy of results

We test every calculator against reference values and review our formulas regularly. However, results depend entirely on the numbers and assumptions you enter, and simplified models cannot capture every real-world factor. Use the results as a starting point, not a final answer.

External links & advertising

The Site may contain advertising and links to third-party websites. We do not endorse and are not responsible for third-party content, products or services.

Questions

If anything is unclear, contact us — we're happy to explain how any calculator works.