Enter any three values, leave one at 0. Click on "Calculate".
Metric Voltage Drop Calculation:
Load Current
(Amp)
Wire Diameter
(mm)
Wire Run Length
(m)
Voltage Drop
(V)
Enter any two values, leave one at 0. Click on "Calculate".
Power Calculation:
Power
(W or VA)
Current
(Amp)
Voltage
(V)
Resistance
(Ohm)
Enter any three values, leave two at 0. Click on "Calculate".
Battery Power Calculation:
Discharge Time
(Hours)
Current
(Amp)
Battery Capacity
(AH)
Enter any two values, leave one at 0. Click on "Calculate".
The Coulomb
The coulomb, symbol C, is the SI unit of electric charge, and is defined in terms of the ampere:
1 coulomb is the amount of electric charge (quantity of electricity) carried by a current of 1 ampere flowing for 1 second.
It is also about 6.241506×1018 times the charge of an electron. It is named after Charles-Augustin de Coulomb (1736-1806).