> ## 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.

# Adjust a Calculation

> Change units, use formulas in inputs, and change load combinations.

> **[Change Units](https://calcs.com/docs/running-calculations/adjusting-a-calculation/change-units/change-units.md)**

> **[Use Formulas and Convert Units in Inputs](https://calcs.com/docs/running-calculations/adjusting-a-calculation/change-units/use-formulas-convert-units-inputs.md)**

> **[Change or Create Custom Load Combinations](https://calcs.com/docs/running-calculations/adjusting-a-calculation/change-load-combinations/change-or-create-custom-load-combinations.md)**

> **[Building Codes & Load Combinations in the United States](https://calcs.com/docs/running-calculations/adjusting-a-calculation/change-load-combinations/building-codes-load-combinations-united-states.md)**
>
> How Calcs.com handles US building codes: IBC, IRC, and ASCE 7 selection, load combinations, material design standards, and live load reduction.


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