## VII.D.3. |

# Converting between rotational constants and moments of inertia

Rotational constants are inversely related to moments of inertia:**B** = **h**/(8 π^{2} **c** **I**)

Where **B** is the rotational constant (cm^{-1})
**h** is Plancks constant (gm cm^{2}/sec)
**c** is the speed of light (cm/sec)
**I** is the moment of inertia (gm cm^{2})

Enter a rotational constant or a moment of inertia in the appropriate box below and press the adjacent calculate button. The related quantities will appear in the other boxes.