the SI unit of action is joule-second.
A atomic unit of action is equal to 1.05457172647 x 10-34 joule-second.
A Planck constant is equal to 6.6260695729 x 10-34 joule-second.
Multiply the Planck constant value by 6.283185
atomic unit of action = Planck constant x 6.283185
Divide the atomic unit of action value by 6.283185
Planck constant = atomic unit of action / 6.283185
One atomic unit of action (au) is equal to 0.159155 Planck constant (h)
1 atomic unit of action (au) = 0.159155 Planck constant (h)
One Planck constant (h) is equal to 6.283185 atomic unit of action (au)
1 Planck constant (h) = 6.283185 atomic unit of action (au)