Atomic Mass Constant Energy

The rest energy of one unified atomic mass unit: 931.494 MeV, the exchange rate of mass defect energy.

Specifications & Metrics

symbol

uc²

status

Measured — CODATA 2022 adjustment

value

931.49410372 ± 2.9 × 10⁻⁷ MeV

Relative Scale in Constants

Core Principles & Analysis

• One u of mass converts to 931.5 MeV — the arithmetic behind every binding-energy budget.
• Nuclear mass tables quote defects in this currency.
• E = mc² made quantitative for the periodic table.