Watts to Amps Calculator

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If you want to convert watts to amps, you can use this formula: Power = Current x Voltage (P = IV). Our calculator below can also do this conversion for you!


Here are some common watts to amps calculations:


Amps (12 V)

Amps (24 V)

Amps (120 V)

Amps (220 V)

Amps (240 V)

1 W

83 mA

42 mA




10 W

830 mA

420 mA




50 W

4.17 A

2.08 A




100 W

8.33 A

4.17 A

0.83 A

0.45 A

0.42 A

200 W

16.67 A

8.33 A

1.67 A

0.91 A

0.83 A

300 W

25.00 A

12.50 A

2.50 A

1.36 A

1.25 A

400 W

33.3 A

16.67 A

3.33 A

1.82 A

1.67 A

500 W

41.7 A

20.83 A

4.17 A

2.27 A

2.08 A

Benefits of Using a Watts to Amps Calculator

Using a watts to amps calculator has many benefits, especially if you have to make calculations for electrical work. Here are some reasons to use one:

Accuracy: A watts to amps calculator can provide accurate calculations without the risk of human error.

Convenience: A watts to amps calculator can quickly convert electrical units and save time compared to manual calculations.

Safety: By using a watts to amps calculator, you can ensure that electrical circuits and devices are not overloaded, which can help prevent electrical accidents.

Cost-Effective: you can calculate the electrical consumption of devices and make informed decisions about energy usage using a watts to amps calculator. This can lead to cost savings over time.

Factors That Affect the Accuracy of a Watts to Amps Calculator

Several factors can affect the accuracy of a watts to amps calculator. These include:

Voltage Variations: The accuracy of your watts to amps calculations may be affected by voltage fluctuations in the power supply.

Phase Angle: The phase angle between voltage and current can impact the accuracy of your calculations.

Harmonics: The presence of harmonics in the electrical system can affect the accuracy of the calculation you made.

Temperature and Altitude: Temperature and altitude can affect the accuracy of some types of measuring equipment used in the calculation process.

Tips for Getting the Most Out of a Watts to Amps Calculator

If you want to get the most out of our watts to amps calculator, follow these tips!

Tip 1

Ensure that you have accurate and complete information about the electrical system, device, or circuit you want to calculate.

Tip 2

Consider other electrical parameters that may affect the accuracy of the calculation. This can include the voltage, power factor, phase angle, and harmonics.

Tip 3

Double-check your calculations and results to ensure they are accurate and reasonable.

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