Package org.djunits.quantity

Class Power.Unit

java.lang.Object

org.djunits.unit.AbstractUnit<Power.Unit,Power>

org.djunits.quantity.Power.Unit

All Implemented Interfaces:

UnitInterface<Power.Unit,Power>

Enclosing class:

Power

public static class Power.Unit
extends AbstractUnit<Power.Unit,Power>

Power.Unit encodes the units for the rate of energy transfer or work done per unit time.

Copyright (c) 2025-2026 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://djunits.org. The DJUNITS project is distributed under a three-clause BSD-style license.

Author:

Alexander Verbraeck

Field Summary

Fields

Modifier and Type	Field	Description
static final Power.Unit	erg_s	erg per second.
static final Power.Unit	ft_lbf_h	foot-pound-force per hour.
static final Power.Unit	ft_lbf_min	foot-pound-force per minute.
static final Power.Unit	ft_lbf_s	foot-pound-force per second.
static final Power.Unit	GW	gigawatt.
static final Power.Unit	hp_M	horsepower (metric).
static final Power.Unit	kW	kilowatt.
static final Power.Unit	muW	microwatt.
static final Power.Unit	mW	milliwatt.
static final Power.Unit	MW	megawatt.
static final Power.Unit	PW	petawatt.
static final Power.Unit	SI	The SI or BASE unit.
static final SIUnit	SI_UNIT	The dimensions of power: kgm2/s3.
static final Power.Unit	sn_m_s	sthene-meter per second.
static final Power.Unit	TW	terawatt.
static final Power.Unit	W	Watt.

Constructor Summary

Constructors

Constructor	Description
Unit(String id, String name, double scaleFactorToBaseUnit, UnitSystem unitSystem)	Create a new Power unit.
Unit(String textualAbbreviation, String displayAbbreviation, String name, Scale scale, UnitSystem unitSystem)	Return a derived unit for this unit, with textual abbreviation(s) and a display abbreviation.

Method Summary

Modifier and Type	Method	Description
Power.Unit	deriveUnit(String textualAbbreviation, String displayAbbreviation, String name, double scaleFactor, UnitSystem unitSystem)	Return a linearly scaled derived unit for this unit, with textual abbreviation(s) and a display abbreviation.
Power.Unit	getBaseUnit()	Return the base unit for this unit.
Power	ofSi(double si)	Return an SI-quantity for this unit with a value.
SIUnit	siUnit()	Return the SI unit for this unit.

Methods inherited from class org.djunits.unit.AbstractUnit

deriveUnit, equals, generateSiPrefixes, getDisplayAbbreviation, getId, getName, getScale, getSiPrefix, getStoredDisplayAbbreviation, getStoredName, getStoredTextualAbbreviation, getTextualAbbreviation, getUnitSystem, hashCode, setSiPrefix, setSiPrefix, setSiPrefixKilo, setSiPrefixPer, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.djunits.unit.UnitInterface

fromBaseValue, quantityInUnit, toBaseValue

Field Details

SI_UNIT

public static final SIUnit SI_UNIT

The dimensions of power: kgm2/s3.

W

public static final Power.Unit W

Watt.

SI

public static final Power.Unit SI

The SI or BASE unit.

muW

public static final Power.Unit muW

microwatt.

mW

public static final Power.Unit mW

milliwatt.

kW

public static final Power.Unit kW

kilowatt.

MW

public static final Power.Unit MW

megawatt.

GW

public static final Power.Unit GW

gigawatt.

TW

public static final Power.Unit TW

terawatt.

PW

public static final Power.Unit PW

petawatt.

ft_lbf_h

public static final Power.Unit ft_lbf_h

foot-pound-force per hour.

ft_lbf_min

public static final Power.Unit ft_lbf_min

foot-pound-force per minute.

ft_lbf_s

public static final Power.Unit ft_lbf_s

foot-pound-force per second.

hp_M

public static final Power.Unit hp_M

horsepower (metric).

sn_m_s

public static final Power.Unit sn_m_s

sthene-meter per second.

erg_s

public static final Power.Unit erg_s

erg per second.

Constructor Details

Unit

public Unit(String id,
 String name,
 double scaleFactorToBaseUnit,
 UnitSystem unitSystem)

Create a new Power unit.

Parameters:

id - the id or main abbreviation of the unit

name - the full name of the unit

scaleFactorToBaseUnit - the scale factor of the unit to convert it TO the base (SI) unit

unitSystem - the unit system such as SI or IMPERIAL

Unit

public Unit(String textualAbbreviation,
 String displayAbbreviation,
 String name,
 Scale scale,
 UnitSystem unitSystem)

Return a derived unit for this unit, with textual abbreviation(s) and a display abbreviation.

Parameters:

textualAbbreviation - the textual abbreviation of the unit, which doubles as the id

displayAbbreviation - the display abbreviation of the unit

name - the full name of the unit

scale - the scale to use to convert between this unit and the standard (e.g., SI, BASE) unit

unitSystem - unit system, e.g. SI or Imperial

Method Details

siUnit

public SIUnit siUnit()

Description copied from interface: UnitInterface

Return the SI unit for this unit.

Returns:

the SI unit for this unit

getBaseUnit

public Power.Unit getBaseUnit()

Description copied from interface: UnitInterface

Return the base unit for this unit.

Returns:

the base unit for this unit

ofSi

public Power ofSi(double si)

Description copied from interface: UnitInterface

Return an SI-quantity for this unit with a value.

Parameters:

si - the value in SI or BASE units

Returns:

an SI-quantity for this unit with the given si-value

deriveUnit

public Power.Unit deriveUnit(String textualAbbreviation,
 String displayAbbreviation,
 String name,
 double scaleFactor,
 UnitSystem unitSystem)

Description copied from class: AbstractUnit

Return a linearly scaled derived unit for this unit, with textual abbreviation(s) and a display abbreviation.

Specified by:

deriveUnit in class AbstractUnit<Power.Unit,Power>

Parameters:

textualAbbreviation - the textual abbreviation of the unit, which doubles as the id

displayAbbreviation - the display abbreviation of the unit

name - the full name of the unit

scaleFactor - the (linear) scale factor to multiply with the current (linear) scale factor

unitSystem - unit system, e.g. SI or Imperial

Returns:

a derived unit for this unit