Watts to Amp – Conversion, equation, table, convert and calculator free.

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With this calculator you can convert from Watts to Amp easily, quickly and free any electric power, the calculation takes into account the power factor.

The calculation takes into account the power factor of the electrical system and give the most common values.

We also show the formula that is used for the conversion and a table with the main conversions from Watts to Amp.


More information on converting from Watts to Amp:


Definition P.F, Amperes and P (Watts):

Watts: is Working Power (also called Actual Power or Active Power or Real Power). It is the power that actually powers the equipment and performs useful work.

The real power in watts is the power that performs work or generates heat. Power in watts is the rate at which energy is consumed (or generated). One watt is one joule (energy) per second (1 W = 1 J/s).

Resistive devices or loads such as heaters, incandescent lamps are rated in Watts.

Ampere: Amperage is a term often used by electricians, and means electrical current, measured in amperes, or amps. The ampere is the SI unit for electrical current, or the amount of electrical charge that flows through a conductor in a given time. One ampere is a charge of one coulomb — about 6.241 X 1018 electrons — per second flowing past a given point.

P.F: Power factor is the ratio of working power to apparent power. It measures how effectively electrical power is being used. A high power factor signals efficient utilization of electrical power, while a low power factor indicates poor utilization of electrical power.

Power Factor is the cosine of the phase angle between current and voltage.
Power Factor is the ratio of true power to apparent power.

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Watts to Amp calculation formula:formula from convert of watts to amp 

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Typical Un-improved Power Factor by Industry:

IndustryPower Factor
Auto Parts0.75-0.80
Brewery0.75-0.80
Cement0.80-0.85
Chemical0.65-0.75
Coal Mine0.65-0.80
Clothing0.35-0.60
Electroplating0.65-0.70
Foundry0.75-0.80
Forging0.70-0.80
Hospital0.75-0.80
Machine Manufacturing0.60-0.65
Metalworking 0.65-0.70
Office Building0.80-0.90
Oil field Pumping0.40-0.60
Paint Manufacturing0.65-0.70
Plastic0.75-0.80
Stamping0.60-0.70
Steel Works0.65-0.80
Tool, dies, jigs industry0.65-0.75

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Typical power factor of common household electronics:

Electronics devicePower Factor
Magnavox Projection TV – standby0,37
Samsung 70″ 3D Bluray0,48
Digital Picture Frame0,52
ViewSonic Monitor0,5
Dell Monitor0,55
Magnavox Projection TV0,58
Digital Picture Frame0,6
Digital Picture Frame0,62
Digital Picture Frame0,65
Philips 52″ Projection TV0,65
Wii0,7
Digital Picture Frame0,73
Xbox Kinect0,75
Xbox 3600,78
Microwave0,9
Sharp Aquos 3D TV0,95
PS3 Move0,98
Playstation 30,99
Element 41″ Plasma TV0,99
Current large, flat-screen television0,96
Windows-mount air conditioner0,9
Legacy CRT-Based color television0,7
Legacy flat panel computer monitor0,64
While-LED lighting fixture0,61
Legacy laptop power adapter0,55
Laser Printer0,5
Incandescent lamps1
Fluorescent lamps (uncompensated)0,5
Fluorescent lamps (compensated)0,93
Discharge lamps0,4-0,6

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Typical Motor Power Factors:

PowerSpeedPower Factor
(hp)(rpm)1/2 load3/4 loadfull load
0 – 518000.720.820.84
5 – 2018000.740.840.86
20 – 10018000.790.860.89
100 – 30018000.810.880.91

Reference // Power Factor in Electrical Energy Management-A. Bhatia, B.E.-2012
Power Factor Requirements for Electronic Loads in California- Brian Fortenbery,2014
http://www.engineeringtoolbox.com

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Watts to Amp conversion table:

WattsPhaseP.fVoltAmp
1W3P0,8208V0,003A
2W3P0,8208V0,006A
3W3P0,8208V0,01A
4W3P0,8208V0,013A
5W3P0,8208V0,017A
6W3P0,8208V0,02A
7W3P0,8208V0,024A
8W3P0,8208V0,027A
9W3P0,8208V0,031A
10W3P0,8208V0,034A
20W3P0,85220V0,061A
30W3P0,85220V0,092A
40W3P0,85220V0,123A
50W3P0,85220V0,15A
60W3P0,85220V0,18A
70W3P0,85220V0,2A
80W3P0,85220V0,24A
90W3P0,85220V0,27A
100W3P0,85220V0,3A
200W3P0,9440V0,291A
300W3P0,9440V0,43A
400W3P0,9440V0,58A
500W3P0,9440V0,72A
600W3P0,9440V0,87A
700W3P0,9440V1A
800W3P0,9440V1,16A
900W3P0,9440V1,32A
1000W3P0,9440V1,4A
2000W3P0,95480V2,53A
3000W3P0,95480V3,7A
4000W3P0,95480V5A
5000W3P0,95480V6,3A
6000W3P0,95480V7,5A
7000W3P0,95480V8,8A
8000W3P0,95480V10,1A
9000W3P0,95480V11,3A
10000W3P0,95480V12,6A