# Units of measurement for Minimum Variance Hedge Ratio

The minimum variance hedge ratio is given by $$h=p*\frac{\sigma_S}{\sigma_F}$$.

I was wondering if you wanted to calculate the S.D yourself and the spot prices were in Dollars per barrel while futures prices were in Dollars per million BTU, would you have to change barrels into million BTU (ie. multiply 5.4)?