In SI, Henry is the unit of

Show that in SI units, the unit of G is Newton m^(2) kg^(-2) . The value of G was first experimentally measured by Henry Cavendish. In SI units its value is 6.673 xx 10^(-11) Nm^(2) kg^(-2) .

Henry is the SI unit for measurement of

The SI unit of distance is m, whereas the SI unit of displacement is km.

What do you mean by SI units ? What is the SI unit of mass ?