With this calculator you can convert from Amp to Watts 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 Amp to Watts.
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.
Amp to Watts calculation formula:
Typical Un-improved Power Factor by Industry:
| Industry | Power Factor |
| Auto Parts | 0.75-0.80 |
| Brewery | 0.75-0.80 |
| Cement | 0.80-0.85 |
| Chemical | 0.65-0.75 |
| Coal Mine | 0.65-0.80 |
| Clothing | 0.35-0.60 |
| Electroplating | 0.65-0.70 |
| Foundry | 0.75-0.80 |
| Forging | 0.70-0.80 |
| Hospital | 0.75-0.80 |
| Machine Manufacturing | 0.60-0.65 |
| Metalworking | 0.65-0.70 |
| Office Building | 0.80-0.90 |
| Oil field Pumping | 0.40-0.60 |
| Paint Manufacturing | 0.65-0.70 |
| Plastic | 0.75-0.80 |
| Stamping | 0.60-0.70 |
| Steel Works | 0.65-0.80 |
| Tool, dies, jigs industry | 0.65-0.75 |
Typical power factor of common household electronics:
| Electronics device | Power Factor |
| Magnavox Projection TV – standby | 0,37 |
| Samsung 70″ 3D Bluray | 0,48 |
| Digital Picture Frame | 0,52 |
| ViewSonic Monitor | 0,5 |
| Dell Monitor | 0,55 |
| Magnavox Projection TV | 0,58 |
| Digital Picture Frame | 0,6 |
| Digital Picture Frame | 0,62 |
| Digital Picture Frame | 0,65 |
| Philips 52″ Projection TV | 0,65 |
| Wii | 0,7 |
| Digital Picture Frame | 0,73 |
| Xbox Kinect | 0,75 |
| Xbox 360 | 0,78 |
| Microwave | 0,9 |
| Sharp Aquos 3D TV | 0,95 |
| PS3 Move | 0,98 |
| Playstation 3 | 0,99 |
| Element 41″ Plasma TV | 0,99 |
| Current large, flat-screen television | 0,96 |
| Windows-mount air conditioner | 0,9 |
| Legacy CRT-Based color television | 0,7 |
| Legacy flat panel computer monitor | 0,64 |
| While-LED lighting fixture | 0,61 |
| Legacy laptop power adapter | 0,55 |
| Laser Printer | 0,5 |
| Incandescent lamps | 1 |
| Fluorescent lamps (uncompensated) | 0,5 |
| Fluorescent lamps (compensated) | 0,93 |
| Discharge lamps | 0,4-0,6 |
Typical Motor Power Factors:
| Power | Speed | Power Factor | ||
| (hp) | (rpm) | 1/2 load | 3/4 load | full load |
| 0 – 5 | 1800 | 0.72 | 0.82 | 0.84 |
| 5 – 20 | 1800 | 0.74 | 0.84 | 0.86 |
| 20 – 100 | 1800 | 0.79 | 0.86 | 0.89 |
| 100 – 300 | 1800 | 0.81 | 0.88 | 0.91 |
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
Amp to Watts conversion table:
| Amp | Phase | P.f | Volt | Watts |
| 1Amp | 3P | 0,8P.f | 208Volt | 288,21Watts |
| 2Amp | 3P | 0,8P.f | 208Volt | 576,4Watts |
| 3Amp | 3P | 0,8P.f | 208Volt | 864,63Watts |
| 4Amp | 3P | 0,8P.f | 208Volt | 1152,8Watts |
| 5Amp | 3P | 0,8P.f | 208Volt | 1441Watts |
| 6Amp | 3P | 0,8P.f | 208Volt | 1729,2Watts |
| 7Amp | 3P | 0,8P.f | 208Volt | 2017,4Watts |
| 8Amp | 3P | 0,8P.f | 208Volt | 2305,7Watts |
| 9Amp | 3P | 0,8P.f | 208Volt | 2593,9Watts |
| 10Amp | 3P | 0,8P.f | 208Volt | 2882,1Watts |
| 20Amp | 3P | 0,85P.f | 220Volt | 6477,8Watts |
| 30Amp | 3P | 0,85P.f | 220Volt | 9716,8Watts |
| 40Amp | 3P | 0,85P.f | 220Volt | 12955,7Watts |
| 50Amp | 3P | 0,85P.f | 220Volt | 16194,6Watts |
| 60Amp | 3P | 0,85P.f | 220Volt | 19433,6Watts |
| 70Amp | 3P | 0,85P.f | 220Volt | 22672,5Watts |
| 80Amp | 3P | 0,85P.f | 220Volt | 25911,4Watts |
| 90Amp | 3P | 0,85P.f | 220Volt | 29150,4Watts |
| 100Amp | 3P | 0,85P.f | 220Volt | 32389,3Watts |
| 200Amp | 3P | 0,9P.f | 440Volt | 137178,4Watts |
| 300Amp | 3P | 0,9P.f | 440Volt | 205767,6Watts |
| 400Amp | 3P | 0,9P.f | 440Volt | 274356,8Watts |
| 500Amp | 3P | 0,9P.f | 440Volt | 342946Watts |
| 600Amp | 3P | 0,9P.f | 440Volt | 411535,2Watts |
| 700Amp | 3P | 0,9P.f | 440Volt | 480124,4Watts |
| 800Amp | 3P | 0,9P.f | 440Volt | 548713,6Watts |
| 900Amp | 3P | 0,9P.f | 440Volt | 617302,9Watts |
| 1000Amp | 3P | 0,9P.f | 440Volt | 685892,1Watts |
| 1100Amp | 3P | 0,95P.f | 480Volt | 868796,68Watts |
| 1200Amp | 3P | 0,95P.f | 480Volt | 947778,2Watts |
| 1300Amp | 3P | 0,95P.f | 480Volt | 1026759,7Watts |
| 1400Amp | 3P | 0,95P.f | 480Volt | 1105741,2Watts |
| 1500Amp | 3P | 0,95P.f | 480Volt | 1184722,7Watts |
| 1600Amp | 3P | 0,95P.f | 480Volt | 1263704,2Watts |
