# Area

The **Area** function calculates the area of a geography polygon, in specified units.

When you apply the **Area** function to geography points or geography lines, Sigma returns 0.

You can use the **Area** function on Snowflake and BigQuery connections.

**Area** is one of Sigma's Geography functions.

## Syntax

Area(units, polygon)

The function arguments are:

- units
- Required
- The unit of measurement for the area
- Valid values are
`"square_kilometers"`

,`"square_meters"`

, and`"square_miles"`

. - polygon
- Required
- The object for which we calculate the area
- Must be in valid Geography polygon format.
- To work from known latitude and longitude values, use the MakePoint or MakeLine functions.

## Examples

Area("square_kilometers", [Coordinates])

Area("square_meters", [Coordinates])

Area("square_miles", [Coordinates])

The **Area** function returns the following values for the **Coordinates** column values that define a polygon, when specifying area in square kilometers, square meters, or square miles: