1kgf (kilogram-force) is not equal to 1 kg (kilogram).

Here's why:

* Kilogram (kg): This is a unit of mass, which measures the amount of matter in an object.

* Kilogram-force (kgf): This is a unit of force, which is a push or pull.

To convert between force and mass, you need the acceleration due to gravity (g). On Earth, g is approximately 9.81 m/s².

Here's the conversion:

1 kgf = 1 kg * 9.81 m/s²

So, 1 kgf is equivalent to the force exerted by gravity on a 1 kg mass.