Atomic Mass Unit to Kilogram Converter 2025 - u to kg Calculator | Thiyagi

Atomic Mass Unit to Kilogram Converter

Convert between atomic mass units (u) and kilograms (kg) for chemistry, physics, molecular calculations, and atomic science

Dalton (Da) or unified atomic mass unit
Base SI unit of mass
Enter a value to see the conversion result

Atomic Mass Reference

Atomic Mass Units ⇔ Kilograms
1 u ⇔ 1.66×10⁻²⁷ kg
12 u ⇔ 1.99×10⁻²⁶ kg
16 u ⇔ 2.66×10⁻²⁶ kg
56 u ⇔ 9.30×10⁻²⁶ kg
235 u ⇔ 3.90×10⁻²⁵ kg
6.022×10²³ u ⇔ 1.000 kg

Chemistry Applications

Common Elements:
• Hydrogen (H): 1.008 u
• Carbon-12 (C): 12.000 u
• Oxygen-16 (O): 15.999 u
• Iron-56 (Fe): 55.845 u
Molecular Masses:
• Water (H₂O): 18.015 u
• Methane (CH₄): 16.043 u
• Glucose (C₆H₁₂O₆): 180.156 u
• Caffeine (C₈H₁₀N₄O₂): 194.191 u
Nuclear Physics:
• Proton mass: 1.007276 u
• Neutron mass: 1.008665 u
• Electron mass: 0.000549 u
• Alpha particle: 4.002603 u

Mass Units

  • u: 1.66054×10⁻²⁷ kg
  • kg: Base SI mass unit
  • Avogadro: 6.022×10²³ particles
  • Carbon-12: Reference standard

Usage Tips

  • u for atomic calculations
  • kg for bulk measurements
  • Use scientific notation
  • Consider isotope variations

Applications

  • Chemistry: Molecular weight
  • Physics: Nuclear reactions
  • Research: Mass spectrometry
  • Education: Stoichiometry