Full name: square mil
Category type: area
Scale factor: 6.4516E-10
The SI derived unit for area is the square meter.
1 square meter is equal to 1550003100.0062 square mil.
Valid units must be of the area type.
You can use this form to select from known units:
A square mil is defined as the area of a square with sides one mil in length.
The definition of a mil is as follows:
A milliradian, often called a mil or mrad, is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian).
Compass use of mils typically rounds 6283 to 6400 for simplification, but here we use the official definition.