Text Size
Watt hours
Watt time in hours
Watt hours per day
Battery voltage
Avg. Amp hours
Total Amp hours per day

Watt hours to amp hours calc
Used to convert the measured watt hours over the time as measured on a meter to the equivalent daily watt hours, of the device measured.

Watt Time in days = Watt Time in hours / 24 hours in a day
Watt Hours per day = Watt Hours / Watt Time in days

Watt hours per day is then converted to the equivelent battery amp hours at the systems voltage.

Average Amp per Hour = Watt Hours / Watt Time in hours / Battery voltage
Total Amp hour per day = Watt Hours per day / Battery voltage

Enter the values then press Calculate

I use a KILL A WATT P440 meter from http://www.p3international.com