> For the complete documentation index, see [llms.txt](https://brenkel-solutions-eg.gitbook.io/dp-calculation-eng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://brenkel-solutions-eg.gitbook.io/dp-calculation-eng/pre-calculation/calculation.md).

# Calculation

## Calculate item

If you want to recalculate a calculation, you can do this by clicking the “Calculate Item button.

![Figure 1: Calculate item](/files/Gr9rKDUeMBvceQiWdXIH)

This will delete the lines and recalculate them again

## Prepare Calculation

U can prepare the calculation to apply your own schemes to the calculation.

![Figure 2: Prepare calculation](/files/aaXp4MwhlUl7bZGzvBNf)

This will create a new schema for the calculation. For more information: [Schemas](/dp-calculation-eng/pre-calculation/schemas.md)