# Planck Constant

Written by Jerry Ratzlaff on . Posted in Relativity

## Planck Constant Formula

 $$\large{ E = h\;f }$$

### Where:

 Units English SI $$\large{ T_p }$$ = Planck constant $$\large{\frac{lbf-ft}{sec}}$$ $$\large{J-s}$$ $$\large{ E }$$ = energy $$\large{ lbf-ft }$$ $$\large{ J }$$ $$\large{ f }$$ = frequency $$\large{Hz}$$ $$\large{Hz}$$