How much is 51500 kg in kN?

Answer 1

'N' is a Newton , which is a unit of FORCE. So for mass in Kg you need to know the Acceleration .

F(N) = mass(kg X Acceleration (m/s^2) .

The 'k' in kN only refers to 'thousands of Newtons.

Assuming you are on the Earth's surface, then gravitational acceleration is ~ 10 m/s^(2)

So substituting

Force(N) = 51500 kg X 10 m/s^(2) =

Force(N) = 515000 N

Force in kN - 515 kN .

Answer 2

51500kg is 505kN at Earth's surface.