What is the value of 1amu?

One Atomic Mass unit (amu) is defined as one twelfth of the mass of a carbon-12 atom, which is approximately 1.66053906660 × 10⁻²⁷ kilograms. In terms of energy, 1 amu is equivalent to about 931.5 MeV when using Einstein's mass-energy equivalence principle (E=mc²). This unit is commonly used in chemistry and physics to express atomic and molecular weights.