What is the relative mass of a proton?

The mass of a proton is approximately 1.67 x 10^-27 kilograms, which is equivalent to 1 atomic mass unit (u) or 938.272 MeV/c^2. Protons are one of the building blocks of atoms and are found in the nucleus along with neutrons. They have a positive electric charge and are essential for the stability of atoms. The mass of a proton is often used as a reference point for comparing the masses of other subatomic particles.