# formatLength

> Formats a depth value in metres to the active length unit string, rounded (never raw floating-point) and using the target locale's decimal separator.

> **formatLength**(`m`, `units`, `locale`): `string`

Formats a depth value in metres to the active length unit string, rounded
(never raw floating-point) and using the target locale's decimal separator.

## Parameters

### m

`number`

### units

`LengthUnits`

### locale

`"en"` \| `"pt"`

## Returns

`string`