Estimates, not professional advice
LevelCalcs provides material estimates for planning and purchasing. They are not engineering, architectural or code advice. Ground conditions, local codes, product variations and site geometry all change real quantities, and always confirm anything structural or permitted with a qualified professional.
No warranty
We work hard to keep the formulas correct and published sources cited, but the site is provided as is, without warranty of any kind. We are not liable for material shortfalls, over-orders, delays or costs arising from use of these calculators.
Acceptable use
Use the calculators as much as you like, for personal or commercial estimating. Do not scrape the site at volume, resell access to it, or republish its content as your own — linking to a calculator is always welcome.
Changes
Formulas, defaults and these terms may be updated as standards change. The date in the margin shows the last revision.