Grumpy Old Geeks Topics Redefinition of the kilogram Topic Redefinition of the kilogram 2 mentions in 1 episode The hosts discuss a vote to define the kilogram using Planck’s constant instead of a physical object. Mentions 300: Tonight, We Dine in Hell! Nov 22, 2018 4:08 representatives from more than 60 countries voted 4:23 It will be based on a fundamental factor in physics known as Planck's constant