Capacitor Calculations

How to calculate capacitance(Parallel Plate):
C = epsilon * Area / d
C = capacitance(Farradays)
epsilon is the parameter of the dielectric material. If its empty space then just use epsilon_0
epsilon_0 = 8.854 * 10 ^ -12
epsilon = epsilon_0 * k
The dielectric constant(k) of water = 80
d = the distance between the plates

Once you have the value(C) of the capacitance, calculate the charge it will take to raise it to a particular voltage:
Q = capacitance(C) * Voltage
Q = charge(coulombs)
capacitance = farradays
Voltage is inherentlty defined

Now you can calculate the energy stored in the capacitor:
Energy = 1/2 * C * V^2
Energy = joules
C = capacitance(farradays)
V = voltage

The amount of current required to charge the capacitor can also be calculated. This value is time dependent:
I = dQ/dT
I = amps
dQ = change in coulombs
dT = change in time