> For the complete documentation index, see [llms.txt](https://knowledge.out-smart.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://knowledge.out-smart.com/marketplace-packages-and-power-ups/power-ups/forms/use-calculations-in-forms.md).

# Use calculations in Forms

Calculations let the form work out values automatically.

Use them for totals, subtotals, or other numeric results based on employee input.

### Where calculations fit best

Calculations are useful in:

* numeric fields that depend on other fields
* table fields with row or column totals
* forms where the result should be filled automatically

### What calculations can use

Formulas can use:

* arithmetic such as `+`, `-`, `*`, and `/`
* references to other fields
* references to table columns

### Why read-only often helps

Set calculated fields to read-only when employees should not change the result.

That keeps the output consistent.

{% stepper %}
{% step %}

### Open the form

Go to **Settings → Forms**.

Open the form you want to edit.
{% endstep %}

{% step %}

### Select the result field

Open the numeric field or table column that should show the calculated value.
{% endstep %}

{% step %}

### Enter the formula

Add the formula with the field references your setup supports.

Keep the formula as simple as possible.
{% endstep %}

{% step %}

### Set the display options

Choose the decimal precision if needed.

Set the field to read-only if employees should not change it.
{% endstep %}

{% step %}

### Save and test

Save the form.

Then test the result with realistic values and empty values.
{% endstep %}
{% endstepper %}

### Good setup tips

* use clear field names
* test with zero and empty values
* allow editing only when manual correction is part of the process

### FAQ

<details>

<summary>Can I use calculations in tables?</summary>

Yes.

Tables are a common place for calculated values.

</details>

<details>

<summary>Should calculated fields be editable?</summary>

Usually not.

Read-only keeps the result consistent.

</details>

<details>

<summary>What happens if a referenced field is empty?</summary>

That depends on the formula and field type.

Always test that case before rollout.

</details>

### Related topics

* [Create a form](/marketplace-packages-and-power-ups/power-ups/forms/create-a-form.md)
* [Configure table fields in Forms](/marketplace-packages-and-power-ups/power-ups/forms/configure-table-fields-in-forms.md)
* [Use conditional logic in Forms](/marketplace-packages-and-power-ups/power-ups/forms/use-conditional-logic-in-forms.md)


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