Watt 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 / 1s
One watt is also defined as the current flow of one ampere with voltage of one volt.
1W = 1V × 1A
Convert watt to milliwatt, kilowatt, megawatt, gigawatt, dBm, dBW.
Enter the power in one of the text boxes and press the Convert button:
|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|
|kilowatt||kW||1kW = 103 W||P = 2 kW|
|megawatt||MW||1MW = 106 W||P = 5 MW|
|gigawatt||GW||1GW = 109 W||P = 5 GW|
The power P in kilowatts (kW) is equal to the power P in watts (W) divided by 1000:
P(kW) = P(W) / 1000
Convert 1100W to kilowatts:
P(kW) = 1100W / 1000 = 1.1kW
Convert 1900W to kilowatts:
P(kW) = 1900W / 1000 = 1.9kW
The power P in milliwatts (mW) is equal to the power P in watts (W) times 1000:
P(mW) = P(W) ⋅ 1000
Convert 2W to milliwatts:
P(mW) = 1000 ⋅ 2W = 2000mW
Convert 9W to milliwatts:
P(mW) = 1000 ⋅ 9W = 9000mW
The 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)
Convert 25 watts to dBm:
P(dBm) = 10 ⋅ log10(1000⋅20W) = 43.979400087dBm
Convert 55 watts to dBm:
P(dBm) = 10 ⋅ log10(1000⋅55W) = 47.403626895dBm
The 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)
P = 200W, V = 50V
I = 200W / 50V = 4A
P = 300W, V = 50V
I = 300W / 50V = 6A
The 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)
What is the voltage in volts when the power consumption is 90 watts and the current flow is 3 amps?
V = 90W / 3A = 30V
What is the voltage in volts when the power consumption is 135 watts and the current flow is 3 amps?
V = 135W / 3A = 45V
R(Ω) = P(W) / I(A)2
R(Ω) = V(V)2/ P(W)
P(BTU/hr) = 3.412142 ⋅ P(W)
Convert 7000W to BTUs per hour:
P(BTU/hr) = 3.412141633 ⋅ 7000W = 23884.991431 BTU/hr
Convert 15000W to BTUs per hour:
P(BTU/hr) = 3.412141633 ⋅ 15000W = 51182.124495 BTU/hr
E(J) = P(W) ⋅ t(s)
What is the energy consumption of an electrical circuit that has power consumption of 50 watts for time duration of 3 seconds?
E(J) = 50W × 3s = 150J
What is the energy consumption of an electrical circuit that has power consumption of 80 watts for time duration of 3 seconds?
E(J) = 80W × 3s = 240J
P(HP) = P(W) / 746
Convert 16W to electrical horsepower:
P(hp) = 16W / 746 = 0.02144772118 hp
Convert 26W to electrical horsepower:
P(hp) = 26W / 746 = 0.034852546917 hp
The 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
The 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
How many watts does a house use? How many watts does a TV use? How many watts does a refrigerator use?
|Electric component||Typical 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|
|Air conditioner||1..2 kW|
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