# Watts to Amps Conversion Calculator

Use this calculator tool to convert watts to amps and amps to watts. Options are available for both alternating current (AC) and direct current (DC). An explanation for how to convert between watts and amps and conversion charts are available further down the page.

#### Disclaimer

Whilst every effort has been made in building this watts and amps converter, we are not to be held liable for any special, incidental, indirect or consequential damages or monetary losses of any kind arising out of or in connection with the use of the converter tools and information derived from the web site. This watts and amps converter is here purely as a service to you, please use it at your own risk. Do not use calculations for anything where loss of life, money, property, etc could result from inaccurate conversions.

Please see the full disclaimer for more information.

## Convert between watts and amps

If trying to convert amps, watts and volts has got you feeling wired, then settle down and plug in to our handy guide to discover what’s watt. You’re sure to have a lightbulb moment in no time!

**How do you convert watts to amps?**

Formula for converting watts to amps (at a fixed voltage) is:

amps = watts ÷ volts**How do you convert amps to watts?**

Formula for converting amps to watts (at a fixed voltage) is:

watts = amps x volts

Let's look at these conversions a little more closely.

### Amps

Amps are amperes, a unit which measures electrical current. It can be helpful to imagine electrical current as water in a hose. In this analogy, the quantity (volume) of water would be the amps.

### Volts

Volts are a unit to measure force. They measure the force required to make the electrical current (amps) flow. In the hose analogy, the volts would be the water pressure. North American homes typically use 120V for their electrical supply, whilst 230V is common across many other countries.

### Watts

Watts represent the amount of energy produced by the amps and volts working together. Multiplying amps (water volume) by volts (water pressure) gives you the wattage (the resulting power or energy). A water wheel would turn faster and longer, generating more energy if it uses increased water volume and higher water pressure; the same applies to the wattage if amps and volts are increased.

### AC/DC

DC stands for direct current, when the current flows in one single direction. A flashlight with a battery uses a direct current.

AC stands for alternating current, when the current periodically changes direction. In Northern America and Western Japan, this usually happens 60 times per second, or 60Hz / hertz. In Europe, the UK, East Japan and most of Australia, South America, Africa and Asia, the current changes direction 50 times per second, which is 50Hz. Power supplied to homes and businesses uses AC supply.

## How to convert amps to watts

The **Watt’s Law formula** is all that’s needed for these unit conversions. The wattage (power produced / P) is calculated by multiplying the amps (current / I) by the voltage (force / E):

**Power (P) = Current (I) x Voltage (E)**

So…

watts = amps × volts

### Example: 5 amps are being sent at 120 volts. What’s the wattage?

Power = Current x Voltage

Power = 5A x 120V

Power = 600W

## How to convert watts to amps

To find the amps, you work backwards with Watt’s Law and divide the wattage by the volts:

**Current (I) = Power (P) ÷ Voltage (E)**

So…

amps = watts ÷ volts

### Example: 600 watts are being sent at 120 volts. What's the current?

Current = Power ÷ Voltage

Current = 600W ÷ 120V
Current = 5A

And…

If you’re working with larger units, you need to remember that 1 kilowatt is equal to 1000 watts. The formula for Watt’s law stays the same, just as long as you express the wattage in watts (your sum will go wrong if you use ‘5W’ to mean ‘5KW’; you need to use 5000W instead).

### Example: 2.4KW watts are being sent at 120 volts

Current = Power ÷ Voltage

Current = 2400W ÷ 120V

Current = 20A

It’s simple, really, but if you’re feeling short-circuited after all those numbers, just use our **watts and amps conversion calculator** above.

## Watts and amps conversion charts

Power | Voltage | Current |
---|---|---|

50 watts | 120 volts | 0.4167 amps |

100 watts | 120 volts | 0.8333 amps |

150 watts | 120 volts | 1.25 amps |

200 watts | 120 volts | 1.6667 amps |

250 watts | 120 volts | 2.0833 amps |

300 watts | 120 volts | 2.5 amps |

350 watts | 120 volts | 2.9167 amps |

400 watts | 120 volts | 3.3333 amps |

450 watts | 120 volts | 3.75 amps |

500 watts | 120 volts | 4.1667 amps |

550 watts | 120 volts | 4.5833 amps |

600 watts | 120 volts | 5 amps |

650 watts | 120 volts | 5.4167 amps |

700 watts | 120 volts | 5.8333 amps |

750 watts | 120 volts | 6.25 amps |

800 watts | 120 volts | 6.6667 amps |

850 watts | 120 volts | 7.0833 amps |

900 watts | 120 volts | 7.5 amps |

950 watts | 120 volts | 7.9167 amps |

1000 watts | 120 volts | 8.3333 amps |

1050 watts | 120 volts | 8.75 amps |

1100 watts | 120 volts | 9.1667 amps |

1150 watts | 120 volts | 9.5833 amps |

1200 watts | 120 volts | 10 amps |

1250 watts | 120 volts | 10.4167 amps |

1300 watts | 120 volts | 10.8333 amps |

1350 watts | 120 volts | 11.25 amps |

1400 watts | 120 volts | 11.6667 amps |

1450 watts | 120 volts | 12.0833 amps |

1500 watts | 120 volts | 12.5 amps |

1550 watts | 120 volts | 12.9167 amps |

1600 watts | 120 volts | 13.3333 amps |

1650 watts | 120 volts | 13.75 amps |

1700 watts | 120 volts | 14.1667 amps |

1750 watts | 120 volts | 14.5833 amps |

1800 watts | 120 volts | 15 amps |

1850 watts | 120 volts | 15.4167 amps |

1900 watts | 120 volts | 15.8333 amps |

1950 watts | 120 volts | 16.25 amps |

2000 watts | 120 volts | 16.6667 amps |

Note: conversions are for guide-purposes only and are rounded to maximum 4 decimal places. |

Power | Voltage | Current |
---|---|---|

5 watts | 12 volts | 0.4167 amps |

10 watts | 12 volts | 0.8333 amps |

15 watts | 12 volts | 1.25 amps |

20 watts | 12 volts | 1.6667 amps |

25 watts | 12 volts | 2.0833 amps |

30 watts | 12 volts | 2.5 amps |

35 watts | 12 volts | 2.9167 amps |

40 watts | 12 volts | 3.3333 amps |

45 watts | 12 volts | 3.75 amps |

50 watts | 12 volts | 4.1667 amps |

55 watts | 12 volts | 4.5833 amps |

60 watts | 12 volts | 5 amps |

65 watts | 12 volts | 5.4167 amps |

70 watts | 12 volts | 5.8333 amps |

75 watts | 12 volts | 6.25 amps |

80 watts | 12 volts | 6.6667 amps |

85 watts | 12 volts | 7.0833 amps |

90 watts | 12 volts | 7.5 amps |

95 watts | 12 volts | 7.9167 amps |

100 watts | 12 volts | 8.3333 amps |

105 watts | 12 volts | 8.75 amps |

110 watts | 12 volts | 9.1667 amps |

115 watts | 12 volts | 9.5833 amps |

120 watts | 12 volts | 10 amps |

125 watts | 12 volts | 10.4167 amps |

130 watts | 12 volts | 10.8333 amps |

135 watts | 12 volts | 11.25 amps |

140 watts | 12 volts | 11.6667 amps |

145 watts | 12 volts | 12.0833 amps |

150 watts | 12 volts | 12.5 amps |

155 watts | 12 volts | 12.9167 amps |

160 watts | 12 volts | 13.3333 amps |

165 watts | 12 volts | 13.75 amps |

170 watts | 12 volts | 14.1667 amps |

175 watts | 12 volts | 14.5833 amps |

180 watts | 12 volts | 15 amps |

185 watts | 12 volts | 15.4167 amps |

190 watts | 12 volts | 15.8333 amps |

195 watts | 12 volts | 16.25 amps |

200 watts | 12 volts | 16.6667 amps |

Note: conversions are for guide-purposes only and are rounded to maximum 4 decimal places. |

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