Convert atomic mass unit to kilogram

Enter the value to convert from atomic mass unit to kilogram.

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Result: 25 atomic mass units (u) = 4.1513476665E-15 kilograms (kg)

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How to Convert Atomic mass unit to Kilogram

Converting atomic mass unit to kilogram is straightforward using our conversion calculator.

kg = u ÷ 6.02214076208E15

Reverse conversion: Convert kilogram to atomic mass unit

Definition: The kilogram (symbol: kg) is the SI base unit of mass, defined by fixing the Planck constant to exactly 6.62607015 × 10⁻³⁴ J⋅s.

History: Originally defined in 1795 as the mass of one liter of water. Redefined in 2019 using fundamental physical constants.

Current Use: Universal standard for mass measurement in science, commerce, and daily life worldwide except in the United States.

Examples: Human weight: 50-100 kg, bag of flour: 1-5 kg, car weight: 1000-2000 kg, laptop: 1-3 kg