> ## Documentation Index > Fetch the complete documentation index at: https://calcs.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Calculators > Reference guides for every Calcs.com calculator, organised by element and then by region. One guide per calculator, which includes what it does, how to use it, a worked example, how it calculates with the clause references, and where its limits are. Calculators are filed by **element first, then region**. Look for the thing you are designing (a beam, a column, a connection), then pick your code. Analysis tools sit on their own because they behave the same in every region. Every guide names the code edition it documents in the title and the page header. If the edition shown does not match the one in your calculator, email [help@calcs.com](mailto:help@calcs.com) to let us know, because that is a documentation gap rather than a calculator problem. Looking for how to *run* calculations generally, rather than what a specific calculator does? That is [Running calculations](/docs/running-calculations). Looking for the theory behind a check? Head over to [Engineering concepts](/docs/engineering-concepts).