How do I convert Watts to Amperes

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How do I convert Watts to Amperes

Postby Rezn » Tue Mar 23, 2004 7:07 am

I checked on the site for a conversion of Watts to Amperes but could not find it. Could someone please help with that?
Thanks.
Rezn
 

Re: How do I convert Watts to Amperes

Postby Knight » Tue Mar 23, 2004 10:58 pm

Rezn wrote:I checked on the site for a conversion of Watts to Amperes but could not find it. Could someone please help with that?
Thanks.

There is no conversion from Watts to Amperes.

A Watt is a unit of power (Work), An Ampere is a unit of measure of the rate of electron flow or current in an electrical conductor.

There is, however, a formula: Wattage is equal to the voltage (A unit of force) multiplied by the current.
Code: Select all
W = VA


So: In order to convert Watts to Amperes:
Code: Select all
W = VA

Code: Select all
W = VA
-   --
V   V

Code: Select all
W
- = A
V

You will need to divide the Wattage by the voltage.
William J. Knight
Health Physicist
Los Alamos National Labs
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Converting watts to amperes

Postby Jens » Sat Dec 31, 2005 4:32 am

The standard formula for calculating power (in watts) is easy as pie (a mental hook). The formula is

P = I E

where
P is the power in watts
I is the current in Amperes (not VA!)
E is the RMS voltage for AC (typically 115V from the wall socket)

If you are calculating using DC voltages, then you use the absolute voltage. ie: -12V dc use 12V since negative power does not make sense for what you are doing.

good luck

Jens
Jens
 


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