Electrical UnitsElectrical & electronic units of electric current, voltage, power, resistance, capacitance, inductance, electric charge, electric field, magnetic flux, frequency:

Electrical & electronic units table Units prefix table Electrical units definitions

Electrical & electronic units tableUnit Name Unit Symbol Quantity

Ampere (amp) A Electric current (I)

Volt VVoltage (V, E)Electromotive force (E)Potential difference (Δφ)

Ohm Ω Resistance (R)

Watt W Electric power (P)

Decibel-milliwatt dBm Electric power (P)

Decibel-Watt dBW Electric power (P)

Volt-Ampere-Reactive var Reactive power (Q)

Volt-Ampere VA Apparent power (S)

Farad F Capacitance (C)

Henry H Inductance (L)

siemens / mho SConductance (G)Admittance (Y)

Coulomb C Electric charge (Q)

Ampere-hour Ah Electric charge (Q)

Joule J Energy (E)

Kilowatt-hour kWh Energy (E)

Electron-volt eV Energy (E)

Ohm-meter Ω∙m Resistivity (ρ)

siemens per meter S/m Conductivity (σ)

Volts per meter V/m Electric field (E)

Newtons per coulomb N/C Electric field (E)

Volt-meter V·m Electric flux (Φe)

Tesla T Magnetic field (B)

Gauss G Magnetic field (B)

Weber Wb Magnetic flux (Φm)

Hertz Hz Frequency (f)

Seconds s Time (t)

Meter / metre m Length (l)

Square-meter m2 Area (A)

Decibel dB

Parts per million ppm

Units prefix tablePrefix Prefix

SymbolPrefixfactor Example

pico p 10-12 1pF = 10-12F

nano n 10-9 1nF = 10-9F

micro μ 10-6 1μA = 10-6A

milli m 10-3 1mA = 10-3A

kilo k 10 3 1kΩ = 1000Ω

mega M 10 6 1MHz = 106Hz

giga G 10 9 1GHz = 109Hz 

Electrical units definitions

Volt (V)Volt is the electrical unit of voltage.One volt is the energy of 1 joule that is consumed when electric charge of 1 coulomb flows in the circuit.

1V = 1J / 1C

Ampere (A)Ampere is the electrical unit of electrical current. It measures the amount of electrical charge that flows in an electrical circuit per 1 second.

1A = 1C / 1s

Ohm (Ω)Ohm is the electrical unit of resistance.

1Ω = 1V / 1A

Watt (W)Watt is the electrical unit of electric power. It measures the rate of consumed energy.

1W = 1J / 1s1W = 1V · 1A

Decibel-milliwatt (dBm)Decibel-milliwatt or dBm is a unit of electric power, measured with logarithmic scale referenced to 1mW.

10dBm = 10 · log10(10mW / 1mW)

Decibel-Watt (dBW)Decibel-watt or dBW is a unit of electric power, measured with logarithmic scale referenced to 1W.

10dBW = 10 · log10(10W / 1W)

Farad (F)Farad is the unit of capacitance. It represents the amount of electric charge in coulombs that is stored per 1 volt.

1F = 1C / 1V

Henry (H)Henry is the unit of inductance.

1H = 1Wb / 1A

siemens (S)siemens is the unit of conductance, which is the opposite of resistance.

1S = 1 / 1Ω

Coulomb (C)Coulomb is the unit of electric charge.

1C = 6.238792×1018 electron charges

Ampere-hour (Ah)

Ampere-hour is a unit of electric charge.One ampere-hour is the electric charge that flow in electrical circuit, when a current of 1 ampere is applied for 1 hour.

1Ah = 1A · 1hourOne ampere-hour is equal to 3600 coulombs.

1Ah = 3600C

Tesla (T)Tesla is the unit of magnetic field.

1T = 1Wb / 1m2

Weber (Wb)Weber is the unit of magnetic flux.

1Wb = 1V · 1s

Joule (J)Joule is the unit of energy.

1J = 1 kg · 1(m / s)2

Kilowatt-hour (kWh)Kilowatt-hour is a unit of energy.

1kWh = 1kW · 1h = 1000W · 1h

Kilovolt-amps (kVA)Kilovolt-amps is a unit of power.

1kVA = 1kV · 1A = 1000 · 1V · 1A

Hertz (Hz)Hertz is the unit of frequency. It measures the number of cycles per second.

1 Hz = 1 cycles / s

Decibel-milliwatt (dBm) dBm definition dBm to Watt, mW, dBW conversion calculator How to convert mW to dBm How to convert dBm to mW How to convert Watt to dBm How to convert dBm to Watt How to convert dBW to dBm How to convert dBm to dBW dBm to Watt, mW, dBW conversion table

dBm definitiondBm or decibel-milliwatt is an electrical power unit in decibels (dB), referenced to 1 milliwatt (mW). The power in decibel-milliwatts (P(dBm)) is equal to 10 times base 10 logarithm of the power in milliwatts (P(mW)):

P(dBm) = 10 · log10( P(mW) / 1mW) The power in milliwatts (P(mW)) is equal to 1mW times 10 raised by the power in decibel-milliwatts (P(dBm)) divided by 10:

P(mW) = 1mW · 10(P(dBm)

 / 10)

 1 milliwatt is equal to 0 dBm:

1mW = 0dBm 1 watt is equal to 30dBm:

1W = 1000mW = 30dBm

dBm to mW to Watt to dBW conversion calculatorConvert decibel-milliwatts to milliwatts, watts, decibel-watts.Enter the power in one of the text boxes and press the Convert button:

Enter milliwatts: mW

Enter watts: W

Enter dBm: dBm

Enter dBW: dBW

How to convert mW to dBmHow to convert power in milliwatts (mW) to dBm.The power in dBm is equal to the base 10 logarithm of the power in milliwatts (mW):

P(dBm) = 10 · log10( P(mW) / 1mW) For example: what is the power in dBm for power consumption of 100mW?Solution:

P(dBm) = 10 · log10( 100mW / 1mW) = 20dBm

How to convert dBm to mWHow to convert power in dBm to milliwatts (mW).The power in milliwatts (P(mW)) is equal to 10 raised by the power in dBm (P(dBm)) divided by 10?

P(mW) = 1mW · 10(P(dBm)

 / 10)

 For example: what is the power in milliwatts for power consumption of 20dBm?Solution:

P(mW) = 1mW · 10(20dBm / 10) = 100mW

How to convert Watt to dBmHow to convert power in watts (W) to dBm.The power in dBm is equal to the base 10 logarithm of the power in watts (W) plus 30dB:

P(dBm) = 10 · log10( P(W) / 1W) + 30 For example: what is the power in dBm for power consumption of 100W?Solution:

P(dBm) = 10 · log10( 100W / 1W ) + 30 = 50dBm

How to convert dBm to WattHow to convert power in dBm to watts (W).The power in watts (P(W)) is equal to 10 raised by the power in dBm (P(dBm)) minus 30dB divided by 10:

P(W) = 1W · 10( (P(dBm)

- 30) / 10)

 For example: what is the power in watts for power consumption of 40dBm?Solution:

P(W) = 1W · 10( (40dBm - 30) / 10) = 10W

Reset

How to convert dBW to dBmHow to convert power in dBW to dBm.The power in dBm is equal to the base 10 logarithm of the power in watts (W):

P(dBm) = P(dBW) + 30 For example: what is the power in dBm for power consumption of 20dBW?Solution:

P(dBm) = 20dBW + 30 = 50dBm

How to convert dBm to dBWHow to convert power in dBm to dBW.The power in dBW (P(dBW)) is equal to 10 raised by the power in dBm (P(dBm)) divided by 10:

P(dBW) = P(dBm) - 30 For example: what is the power in watts for power consumption of 40dBm?Solution:

P(dBW) = 40dBm - 30 = 10dBW

dBm to Watt, mW, dBW conversion tablePower (dBm)

Power (dBW)Power (watt)

Power (mW)

-100 dBm -130 dBW 0.1 pW 0.0000000001 mW

-90 dBm -120 dBW 1 pW 0.000000001 mW

-80 dBm -110 dBW 10 pW 0.00000001 mW

-70 dBm -100 dBW 100 pW 0.0000001 mW

-60 dBm -90 dBW 1 nW 0.000001 mW

-50 dBm -80 dBW 10 nW 0.00001 mW

-40 dBm -70 dBW 100 nW 0.0001 mW

-30 dBm -60 dBW 1 μW 0.001 mW

-20 dBm -50 dBW 10 μW 0.01 mW

-10 dBm -40 dBW 100 μW 0.1 mW

-1 dBm   -31 dBW 794 μW 0.794 mW

0 dBm -30 dBW 1.000 mW 1.000 mW

1 dBm -29 dBW 1.259 mW 1.259 mW

10 dBm -20 dBW 10 mW 10 mW

20 dBm -10 dBW 100 mW 100 mW

30 dBm 0 dBW 1 W 1000 mW

40 dBm 10 dBW 10 W 10000 mW

50 dBm 20 dBW 100 W 100000 mW

60 dBm 30 dBW 1 kW 1000000 mW

70 dBm 40 dBW 10 kW 10000000 mW

80 dBm 50 dBW 100 kW 100000000 mW

90 dBm 60 dBW 1 MW 1000000000 mW

100 dBm 70 dBW 10 MW 10000000000 mW

 

decibel (dB)?Decibel (dB) definition, how to convert, calculator and dB to ratio table.

Decibel (dB) definition Decibels to watts, volts, hertz, pascal calculator Power ratio to dB conversion dB to power ratio conversion Amplitude ratio to dB conversion dB to amplitude ratio conversion Absolute decibel units Relative decibel units Sound level meter dB-SPL table dB to ratio conversion table

Decibel (dB) definitionDecibel (Symbol: dB) is a logarithmic unit that indicates ratio or gain.Decibel is used to indicate the level of acoustic waves and electronic signals.The logarithmic scale can describe very big or very small numbers with shorter notation.The dB level can be viewed as relative gain of one level vs. other level, or absolute logarithmic scale level for well known reference levels.Decibel is a dimensionless unit.The ratio in bels is the base 10 logarithm of the ratio of P1 and P0:

RatioB = log10(P1 / P0)Decibel is one tenth of a bel, so 1 bel is equal to 10 decibel:

1B = 10dBPower ratioThe power ratio in decibels (dB) is 10 times base 10 logarithm of the ratio of P1 and P0:

RatiodB = 10·log10(P1 / P0)Amplitude ratioThe ratio of quantities like voltage, current and sound pressure level are calculated as ratio of squares.The amplitude ratio in decibels (dB) is 20 times base 10 logarithm of the ratio of V1 and V0:

RatiodB = 10·log10(V12 / V0

2) = 20·log10(V1 / V0)

Decibels to watts, volts, hertz, pascal conversion calculatorConvert dB, dBm, dBW, dBV, dBmV, dBμV, dBu, dBμA, dBHz, dBSPL, dBA to watts, volts, ampers, hertz, sound pressure.

1. Set the quantity type and decibel unit.2. Enter the values in one or two of the text boxes and press the corresponding Convert button:

Quantity type:

Pow er

Decibel unit:

Reference level:

Level:

Decibels:

Power ratio to dB conversionThe gain GdB is equal to 10 times base 10 logarithm of the ratio of the power P2 and the reference power P1.

GdB = 10 log10(P2 / P1) P2 is the power level.P1 is the referenced power level.GdB is the power ratio or gain in dB. 

ExampleFind the gain in dB for a system with input power of 5W and output power of 10W.

GdB = 10 log10(Pout/ Pin) = 10 log10(10W/5W) = 3.01dB

dB to power ratio conversionThe power P2 is equal to the reference power P1 times 10 raised by the gain in GdB divided by 10.

P2 = P1  · 10(GdB / 10)

 P2 is the power level.P1 is the referenced power level.GdB is the power ratio or gain in dB.

Amplitude ratio to dB conversionFor amplitude of waves like voltage, current and sound pressure level:

GdB = 20 log10(A2 / A1) A2 is the amplitude level.A1 is the referenced amplitude level.GdB is the amplitude ratio or gain in dB.

dB to amplitude ratio conversion

dBm

1 mW

mW

dBm

A2 = A1  · 10(GdB / 20)

A2 is the amplitude level.A1 is the referenced amplitude level.GdB is the amplitude ratio or gain in dB. 

ExampleFind the output voltage for a system with input voltage of 5V and voltage gain of 6dB.

Vout = Vin · 10 (GdB / 20) = 5V · 10 (6dB / 20) = 9.976V ≈ 10V

Voltage gainThe voltage gain (GdB) is 20 times the base 10 logarithm of the ratio of the output voltage (Vout) and the input voltage (Vin):

GdB = 20·log10(Vout / Vin)

Current gainThe current gain (GdB) is 20 times the base 10 logarithm of the ratio of the output current (Iout) and the input current (Iin):

GdB = 20·log10(Iout / Iin)

Acoustic gainThe acoustic gain of a hearing aid (GdB) is 20 times the base 10 logarithm of the ratio of the output sound level (Lout) and the input sound level (Lin).

GdB = 20·log10(Lout / Lin)

Signal to Noise Ratio (SNR)The signal to noise ratio (SNRdB) is 20 times the base 10 logarithm of the signal amplitude (Asignal) and the noise amplitude (Anoise):

SNRdB = 20·log10(Asignal / Anoise)

Absolute decibel unitsAbsolute decibel units are referenced to specific magnitude of measurement unit:

Unit NameReferenc

eQuantity Ratio

dBm decibel milliwatt 1mW electric power power ratio

dBW decibel watt 1W electric power power ratio

dBrn decibel reference noise 1pW electric power power ratio

dBμV decibel microvolt 1μVRMS voltage amplitude ratio

dBmV decibel millivolt 1mVRMS voltage amplitude ratio

dBV decibel volt 1VRMS voltage amplitude ratio

dBu decibel unloaded 0.775VRMS voltage amplitude ratio

dBZ decibel Z 1μm3 reflectivity amplitude ratio

dBμA decibel microampere 1μA current amplitude ratio

dBohm

decibel ohms 1Ω resistance amplitude ratio

dBHz decibel hertz 1Hz frequency power ratio

dBSPL decibel sound pressure level 20μPa sound pressure amplitude ratio

dBA decibel A-weighted 20μPa sound pressure amplitude ratio

Relative decibel unitsUnit Name Reference Quantity Ratio

dB decibel - - power/field

dBc decibel carrier carrier power electric power power ratio

dBi decibel isotropicisotropic antenna power density

power density power ratio

dBFS decibel full scale full digital scale voltage amplitude ratio

dBrn decibel reference noise

Sound level meterSound level meter or SPL meter is a device that measures the sound pressure level (SPL) of sound waves in decibels (dB-SPL) units.SPL meter is used to test and measure the loudness of the sound waves and for noise pollution monitoring.The unit for measuring of sound pressure level is pascal (Pa) and in logarithmic scale the dB-SPL is used.

dB-SPL tableTable of common sound pressure levels in dBSPL:

Sound type Sound level (dB-SPL)

Hearing threshold

0 dBSPL

Whisper 30 dBSPL

Air conditioner 50-70 dBSPL

Conversation 50-70 dBSPL

Traffic 60-85 dBSPL

Loud music 90-110 dBSPL

Airplane 120-140 dBSPL

dB to ratio conversion tabledB Amplitude ratio Power ratio

-100 dB 10-5 10-10

-50 dB 0.00316 0.00001

-40 dB 0.010 0.0001

-30 dB 0.032 0.001

-20 dB 0.100 0.010

-10 dB 0.316 0.100

-6 dB 0.501 0.251

-3 dB 0.708 0.501

-2 dB 0.794 0.631

-1 dB 0.891 0.794

0 dB 1.000 1.000

1 dB 1.122 1.259

2 dB 1.259 1.585

3 dB 1.413 2 ≈ 1.995

6 dB 2 ≈ 1.995 3.981

10 dB 3.162 10.000

20 dB 10.000 100.000

30 dB 31.623 1000.000

40 dB 100.000 10000.000

50 dB 316.228 100000.000

100 dB 105 1010

Watt (W) Watt definition Watt to mW, kW, MW, GW, dBm, dBW conversion calculator Table of unit prefixes of watt How to convert watts to kilowatts How to convert watts to milliwatts How to convert watts to dBm How to convert watts to amps How to convert watts to volts How to convert watts to ohms How to convert watts to btu How to convert watts to joules How to convert watts to horsepower How to convert watts to kVA How to convert watts to VA Power consumption table

Watt definitionWatt is the unit of power (symbol: W).

The watt unit is named after James Watt, the inventor of the steam engine.One watt is defined as the energy consumption rate of one joule per second.

1W = 1J / 1sOne watt is also defined as the current flow of one ampere with voltage of one volt.

1W = 1V × 1A

Watt to mW, kW, MW, GW, dBm, dBW conversion calculatorConvert watt to milliwatt, kilowatt, megawatt, gigawatt, dBm, dBW.Enter the power in one of the text boxes and press the Convert button:

Enter milliwatts: mW

Enter watts: W

Enter kilowatts: kW

Enter megawatts: MW

Enter gigawatts: GW

Enter dBm: dBm

Enter dBW: dBW

Table of unit prefixes of wattname symbol conversion example

picowatt pW 1pW = 10-12 W P = 10 pW

nanowatt nW 1nW = 10-9 W P = 10 nW

microwatt μW 1μW = 10-6 W P = 10 μW

milliwatt mW 1mW = 10-3 W P = 10 mW

watt W - P = 10 W

Reset

kilowatt kW 1kW = 103 W P = 2 kW

megawatt

MW 1MW = 106 W P = 5 MW

gigawatt GW 1GW = 109 W P = 5 GW

How to convert watts to kilowattsThe power P in kilowatts (kW) is equal to the power P in watts (W) divided by 1000:

P(kW) = P(W) / 1000

How to convert watts to milliwattsThe power P in milliwatts (mW) is equal to the power P in watts (W) times 1000:

P(mW) = P(W) · 1000

How to convert watts to dBmThe power P in decibel-milliwatts (dBm) is equal to 10 times base 10 logarithm of the power P in milliwatts (mW) divided by 1 milliwatt:

P(dBm) = 10 · log10( P(mW) / 1mW)

How to convert watts to ampsThe current I in ampers (A) is equal to the power P in watts (W) divided by the voltage V in volts (V):

I(A) = P(W) / V(V)

How to convert watts to voltsThe voltage V in volts (V) is equal to the power P in watts (W) divided by the current I in ampers (A):

V(V) = P(W) / I(A)

How to convert watts to ohmsR(Ω) = P(W) / I(A)

2

R(Ω) = V(V)2/ P(W)

How to convert watts to btu/hrP(BTU/hr) = 3.412142 · P(W)

How to convert watts to joulesE(J) = P(W) · t(s)

How to convert watts to horsepowerP(HP) = P(W) / 746

How to convert watts to kVAThe real power P in watts (W) is equal to 1000 times the apparent power S in kilo-volt-amperes (kVA) times the power factor (PF) or cosine of the phase angle φ:

P(W) = 1000 · S(kVA) · PF = 1000 · S(kVA) · cos φ

How to convert watts to VAThe real power P in watts (W) is equal to the apparent power S in volt-amperes (VA) times the power factor (PF) or cosine of the phase angle φ:

P(W) = S(VA) · PF = S(VA) · cos φ

Power consumption of some electrical componentsHow many watts does a house use? How many watts does a TV use? How many watts does a refrigerator use?

Electric componentTypical power consumption in

watts

LCD TV 30..300 W

LCD monitor 30..45 W

PC desktop computer 300..400 W

Laptop computer 40..60 W

Refrigerator 150..300 W (when active)

Light bulb 25..100 W

Fluorescent light 15..60 W

Halogen light 30..80 W

Speaker 10..300 W

Microwave 100..1000 W

Air conditioner 1..2 kW

Volt (V)Volt definitionVolt is the electrical unit of voltage or potential difference (symbol: V).One Volt is defined as energy consumption of one joule per electric charge of one coulomb.

1V = 1J/COne volt is equal to current of 1 amp times resistance of 1 ohm:

1V = 1A · 1Ω

Alessandro VoltaThe Volt unit is named after Alessandro Volta, an Italian physicist who invented an electric battery.

Volt subunits and conversion tablename symbo

l conversion example

microvolt μV 1μV = 10-6V V = 30μV

millivolt mV 1mV = 10-3V V = 5mV

volt V - V = 10V

kilovolt kV 1kV = 103V V = 2kV

megavolt MV 1MV = 106V V = 5MV

Volts to watts conversionThe power in watts (W) is equal to the voltage in volts (V) times the current in amps (A):

watts (W) = volts (V) × amps (A)

Volts to joules conversionThe energy in joules (J) is equal to the voltage in volts (V) times the electric charge in coulombs (C):

joules (J) = volts (V) × coulombs (C)

Volts to amps conversionThe current in amps (A) is equal to the voltage in volts (V) divided by the resistance in ohms (Ω):

amps (A) = volts (V) / ohms(Ω)The current in amps (A) is equal to the power in watts (W) divided by the voltage in volts (V):

amps (A) = watts (W) / volts (V)

Volts to electron-volts conversionThe energy in electronvolts (eV) is equal to the potential difference or voltage in volts (V) times the electric charge in electron charges (e):

electronvolts (eV) = volts (V) × electron-charge (e)                             = volts (V) × 1.602176e-19 coulombs (C)

Ampere unit Ampere definition Amperemeter Table of ampere unit prefixes How to convert amps to microamps (μA) How to convert amps to milliamps (mA) How to convert amps to kiloamps (kA) How to convert amps to watts How to convert amps to volts How to convert amps to ohms How to convert amps to kilowatts How to convert amps to kva How to convert amps to coulombs

Ampere definitionAmpere or amp (symbol: A) is the unit of electrical current.The Ampere unit is named after Andre-Marie Ampere, from France.One Ampere is defined as the current that flows with electric charge of one Coulomb per second.

1 A = 1 C/s

AmperemeterAmpere meter or ammeter is an electrical instrument that is used to measure electrical current in amperes.When we want to measure the electrical current on the load, the ampere-meter is connected in series to the load.The resistance of the ampere-meter is near zero, so it will not affect the measured circuit.

Table of ampere unit prefixesname symbo conversion example

l

microampere (microamps)

μA 1μA = 10-6A I = 50μA

milliampere (milliamps)

mA 1mA = 10-3A I = 3mA

ampere (amps) A - I = 10A

kiloampere (kiloamps)

kA 1kA = 103A I = 2kA

How to convert amps to microamps (μA)The current I in microamperes (mA) is equal to the current I in amperes (A) divided by 1000000:

I(μA) = I(A) / 1000000

How to convert amps to milliamps (mA)The current I in milliamperes (mA) is equal to the current I in amperes (A) divided by 1000:

I(mA) = I(A) / 1000

How to convert amps to kiloamps (kA)The current I in kiloamperes (mA) is equal to the current I in amperes (A) times 1000:

I(kA) = I(A) · 1000

How to convert amps to watts (W)The power P in watts (W) is equal to the current I in amps (A) times the voltage V in volts (V):

P(W) = I(A) · V(V)

How to convert amps to volts (V)The voltage V in volts (V) is equal to the power P in watts (W) divided by the current I in amperes (A):

V(V) = P(W) / I(A)The voltage V in volts (V) is equal to the current I in amperes (A) times the resistance R in ohms (Ω):

V(V) = I(A) · R(Ω)

How to convert amps to ohms (Ω)The resistance R in ohms (Ω) is equal to the voltage V in volts (V) divided by the current I in amperes (A):

R(Ω) = V(V) / I(A)

How to convert amps to kilowatts (kW)The power P in kilowatts (kW) is equal to the current I in amps (A) times the voltage V in volts (V) divided by 1000:

P(kW) = I(A) · V(V) / 1000

How to convert amps to kilovolt-ampere (kVA)The apparent power S in kilovolt-amps (kVA) is equal to RMS current IRMS in amps (A), times the RMS voltage VRMS in volts (V), divided by 1000:

S(kVA) = IRMS(A) · VRMS(V) / 1000

How to convert amps to coulombs (C)The electric charge Q in coulombs (C) is equal to the current I in amps (A), times the time of current flow t in seconds (s):

Q(C) = I(A) · t(s)

Amps to watts calculatorElectric current in amps (A) to electric power in watts (W) calculator.Select current type, enter current in amps, voltage in volts, power factor for AC circuit and press theCalculate button (DC = Direct Current, AC = Alternating Current):

Select current type:

Enter current in amps: A

Enter voltage in volts: V

Power result in watts: W* Use e for scientific notation. E.g: 5e3, 4e-8, 1.45e12 Watts to amps calculator ►

Reset

DC amps to watts calculationThe power P in watts (W) is equal to the current I in amps (A), times the voltage V in volts (V):

P(W) = I(A) × V(V)

AC single phase amps to watts calculationThe power P in watts (W) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V):

P(W) = PF × I(A) × V(V)

AC three phase amps to watts calculationCalculation with line to line voltageThe power P in watts (W) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V):

P(W) = √3 × PF × I(A) × VL-L(V)

Calculation with line to neutral voltageThe power P in watts (W) is equal to 3 times the power factor PF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V):

P(W) = 3 × PF × I(A) × VL-N(V)

Amps to volts calculatorAmps (A) to volts (V) calculator.Select calculation type, enter amps and watts or ohms and press the Calculate button to get volts:

Select calculation:

Enter amps: A

Enter watts: W

Reset

Result in volts: VVolts to amps calculator ►

Amps to volts calculationThe voltage V in volts (V) is equal to the power P in watts (W), divided by the current I in amps (A):

V(V) = P(W) / I(A)The voltage V in volts (V) is equal to the power P in watts (W), divided by the current I in amps (A):

V(V) = I(A) × R(Ω)

Ohm (Ω)Ohm (symbol Ω) is the electrical unit of resistance.The Ohm unit was named after George Simon Ohm.

1Ω = 1V / 1A = 1J · 1s / 1C2

Table of resistance values of Ohmname symbol conversion example

milli-ohm mΩ 1mΩ = 10-3Ω R0 = 10mΩ

ohm Ω - R1 = 10Ω

kilo-ohm kΩ 1kΩ = 103Ω R2 = 2kΩ

mega-ohm MΩ 1MΩ = 106Ω R3 = 5MΩ

OhmmeterOhmmeter is a measurement device that measures resistance.