# Number (Decimal) Fields

Decimal Number fields are for storing numbers with decimal points, and they are particularly useful when precision is essential, like when storing a rating value of 5.5.

{% hint style="info" %}
**Technical Limits**: Like integer fields, decimal fields are also limited by JavaScript's maximum safe integer value of **9,007,199,254,740,991**. This applies to the whole number portion of decimal values.
{% endhint %}

## Decimal Number Field Formats

* **Default** By default, the decimal number field shows a formatted number such as 1,234,000.00
* **Currency** Display the number as a currency, and choose the specific currency symbol. For example: £1,234,000.00
* **Percentage** Display the number as a percentage, values such as 0.2 will be displayed as 20%
* **Unformatted** This displays the number without formatting, such as 1234000.00. This is useful for numbers that aren't really numbers, like Postcodes, or Object IDs

{% hint style="info" %}
**Numbers** are displayed based on your browser settings
{% endhint %}

## Decimal Field Options

* **Allow negative numbers** Depending on the format chosen above, you can optionally enable or disable the use of negative numbers in the field, which will be enforced in all forms
* **Prefix** Configure a prefix for your numbers, such as `USD 123,000.00`
* **Suffix** Configure a suffix to your numbers, such as `12,000.00 Units`
* **Precision** Configure how many decimal places your decimal field should show, from 1 to 8

## Use Cases

Decimal fields are ideal for:

* Precise monetary calculations
* Scientific measurements
* Percentages and ratios
* Ratings with decimal precision
* Weight, height, and other measurements
* Price calculations requiring exact amounts

## Best Practices

* Set appropriate precision levels (number of decimal places) based on your use case
* Use Currency format for all monetary values
* Use Percentage format when storing rates, completion percentages, or ratios
* Consider using prefixes/suffixes to provide units of measurement
* Be mindful of precision requirements - more decimal places aren't always better for user experience


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