EngiRef / Constants
Proton Mass
Rest mass of a proton.
atomicmₚ
Source Details
Id
mp
Name
Proton Mass
Symbol
mₚ
Value
1.67262192369e-27
Unit
kg
Category
atomic
Description
Rest mass of a proton.
Constants
Related Content
Source collection
Speed of Light in Vacuum
Exact defined value in SI. Maximum speed in universe.
fundamentalc
Planck Constant
Exact defined value in SI. Relates photon energy to frequency.
fundamentalh
Reduced Planck Constant
h/(2π). Common in quantum mechanics.
fundamentalℏ
Elementary Charge
Exact defined value in SI. Charge of a proton.
fundamentale
Avogadro's Constant
Exact defined value in SI. Particles per mole.
fundamentalNᴀ
Gravitational Constant
Universal gravitation constant. F = GMm/r².
fundamentalG