Formula Capacitance (Definition) Voltage Electric charge
$$C ~=~ \frac{Q}{U}$$ $$C ~=~ \frac{Q}{U}$$ $$U ~=~ \frac{Q}{C}$$ $$Q ~=~ C \, U$$
Capacitance
\( C \) Unit \( \mathrm{F} \) Capacitance indicates how much electric charge sitting on the electrodes of a capacitor can be separated when a voltage of one volt is applied between the two electrodes. The capacitance is therefore a measure of how good a capacitor can 'store' electric charge.
The capacitance \(C = 1 \, \mu\mathrm{F}\) means that the capacitor can 'store' \(Q = 1\,\mu\mathrm{C}\) of charge when a voltage of one volt is applied.
Voltage
\( U \) Unit \( \mathrm{V} \) Voltage between two electrodes, such as between two capacitor plates.
Electric charge
\( Q \) Unit \( \mathrm{C} \) Amount of charge separated on the electrodes.