Work in geometrized units , with the stationary Killing vector field normalized by at infinity. Put , , and ; is the areal radius. The static spherical Komar mass in reciprocal radial gauge gives
Indeed the future and outward unit normals to a round sphere are and , and . The Komar mass integral is therefore . Since and ,
Taking the asymptotic limit yields
This agrees with . The finite-radius Komar integral need not equal its asymptotic value, because this solution is not vacuum. Restoring divides the mass expression by when has dimensions of length.