Page "Geometrized unit system" Paragraph 13

so in geometric units these must all have the dimension of length.

We can convert a mass expressed in kilograms to the equivalent mass expressed in metres by multiplying by the conversion factor G / c < sup > 2 </ sup >.

For example, the Sun's mass of 2. 0 × 10 < sup > 30 </ sup > kg in SI units is equivalent to 1. 5 km.

This is half the Schwarzschild radius of a one solar mass black hole.

All other conversion factors can be worked out by combining these two.