Amps to Watts or Watts to Amps Calculator

[jeffmossy]

This site is useful for all the watts and Amps conversions

Amps To Watts Calculator | Electrical Safety First

You can calculate Watts using the relationship between Amps, Volts and Watts. To calculate Amps to Watts, simply use our free calculator.

www.electricalsafetyfirst.org.uk

 

[St3v3]

Ah, good old Ivy Watts

I (current) x V equals Watts.

 

[Nosmo king]

Or on the other hand
Watts = amps x volts

 

[Admin]

Just remember to use the actual source voltage and not 12v. 12.8v 13.2v 14.4v etc. This is a mistake often made when people do calculations for motorhomes.

Solar charge at source = 300w divided by 14.4v = 20.83A current not 25A that you would get using 12v.

 

[argoose]

small error it's 300w divided by 14.4v

 

[Admin]

small error it's 300w divided by 14.4v

Thanks, I must be more careful posting at 1:22am

 

[wildebus]

Just remember to use the actual source voltage and not 12v. 12.8v 13.2v 14.4v etc. This is a mistake often made when people do calculations for motorhomes.

Solar charge at source = 300w divided by 14.4v = 20.83A current not 25A that you would get using 12v.

I was going to mention this actually.

And when you use the correct numbers for the calculations, you see that because Lithium Batteries tend to run at a higher average voltage than Lead Acid from 100% fully charged to the 50% or whatever SOC, a 100Ah Lithium delivers more power than a 100Ah Lead Acid (as devices don't use Ahs, they use Watts)