# What is the actual voltage to the standard hydrogen electrode and why is it used?

Why is the standard hydrogen electrode chosen to be of 0 voltage, what is its actual voltage and how could that be calculated experimentally?

Also, why is it that we cannot measure the voltage or potentials of the range of electrodes and we must use the standard hydrogen electrode?

• @Zhe I'm saying is that - What is the standard potential of the reduction of $H+$? – Apoorv Potnis Feb 1 '17 at 14:44