The kilogram is defined in terms of three defining constants:
• a specific atomic transition frequency ΔνCs, … See more

The replacement of the International Prototype of the Kilogram (IPK) as the primary standard was motivated by evidence … See more

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• Inertia – Fundamental principle of classical physics
• Kibble balance – Electromechanical … See more

1. ^ The avoirdupois pound is part of both United States customary system of units and the Imperial system of units. It is defined as exactly 0.45359237 … See more

The kilogram is the only base SI unit with an SI prefix (kilo) as part of its name. The word kilogramme or kilogram is derived from the See more

• Serious medication errors have been made by confusing milligrams and micrograms when micrograms has been abbreviated. The abbreviation "mcg" rather than the SI symbol "μg" is formally mandated for medical practitioners in the US by the See more

• NIST Improves Accuracy of 'Watt Balance' Method for Defining the Kilogram
• The UK's National Physical Laboratory (NPL): See more