Voltage Drop Calculation: Load Current (Amp) Wire Gauge (AWG) Wire Run Length (Ft) Voltage Drop (V)   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".