Class

UnitArea

A unit of measure for area.

Declaration

class UnitArea : Dimension

Overview

You typically use instances of NSUnitArea to represent specific quantities of area using the NSMeasurement class.

Area

Area is a quantity of extent in two dimensions. Area can be expressed by SI derived units in terms of square meters (m²). Area is also commonly measured in square feet (ft²) and acres (ac).

The NSUnitArea class defines its base unit as squareMeters, and provides the following units, which are initialized using UnitConverterLinear converters with the specified coefficients:

Name	Method	Symbol	Coefficient
Square Megameters	`squareMegameters`	Mm²	`1e12`
Square Kilometers	`squareKilometers`	km²	`1000000.0`
Square Meters	`squareMeters`	m²	`1.0`
Square Centimeter	`squareCentimeters`	cm²	`0.0001`
Square Millimeters	`squareMillimeters`	mm²	`0.000001`
Square Micrometers	`squareMicrometers`	µm²	`1e-12`
Square Nanometers	`squareNanometers`	nm²	`1e-18`
Square Inches	`squareInches`	in²	`0.00064516`
Square Feet	`squareFeet`	ft²	`0.092903`
Square Yards	`squareYards`	yd²	`0.836127`
Square Miles	`squareMiles`	mi²	`2.59e+6`
Acres	`acres`	ac	`4046.86`
Ares	`ares`	a	`100`
Hectares	`hectares`	ha	`10000`