Editorial Standards

People make real purchasing decisions from the numbers we publish, so accuracy is not optional. These are the standards every calculator and guide on The Concrete Calculator is held to.

Accuracy first

Formulas are drawn from established construction-estimating practice and manufacturer specifications. Every calculator is verified against hand-worked examples before it goes live, and the math is documented openly on our methodology page so anyone can check it.

Testing and review

Each tool is tested across unit systems (imperial and metric) and edge cases, such as very thin slabs or large multi-pour jobs, to confirm the outputs stay consistent. Content is reviewed for clarity so a first-time DIYer and a working contractor both get a usable answer.

Independence

Our calculators are free and are not tuned to favour any supplier or brand. Where we mention bag sizes or typical prices, they are industry averages meant for planning, and we tell you to confirm current pricing with your local supplier.

Corrections and updates

If a reader reports an error, we investigate promptly and fix confirmed issues across every language version. Calculators are reviewed periodically and updated when standards, yields or best practices change. We would rather correct a number than defend it.

Have a correction? Reach us on the contact page. Meet the people behind the tools on our editorial team page.