Contents

UnitPressure

A unit of measure for pressure.

Declaration

class UnitPressure

Overview

You typically use instances of UnitPressure to represent specific quantities of pressure using the NSMeasurement class.

Pressure

Pressure is the normal force over a surface. The SI unit for pressure is the pascal (Pa), which is derived as one newton of force over one square meter (1 Pa = 1 N / 1 m2).

The UnitPressure class defines its baseUnit() as newtonsPerMetersSquared and provides the following units, which UnitConverterLinear converters initialize with the given coefficients:

Name

Method

Symbol

Definition

Newtons Per Meter Squared (Equivalent to Pascals)

Newtonspermeterssquared

N/m²

1.0

Gigapascals

Gigapascals

GPa

1e9

Megapascals

Megapascals

MPa

1000000.0

Kilopascals

Kilopascals

kPa

1000.0

Hectopascals

Hectopascals

hPa

100.0

Inches of Mercury

Inchesofmercury

inHg

3386.39

Bars

Bars

bar

100000

Millibars

Millibars

mbar

100

Millimeters of Mercury

Millimetersofmercury

mmHg

133.322

Pounds Per Square Inch

Poundsforcepersquareinch

psi

6894.76

Topics

Accessing the Base Unit

Accessing Predefined Units

Initializers

See Also

Mass, Weight, and Force