Home›Concepts, Units & Instruments›UnitsCategoryUnits8 entries. Click any to see everything it connects to.BrowseCompareCompare At A Past YearEnter a year to compare these entries as the atlas records them at that moment. Leave it empty for the present. A year before the common era is entered with a minus sign, so 44 BCE is minus 44.Show This YearSelect all 8AmpereUnits1 linkCandelaUnits1 linkKelvinUnits2 linksKilogramUnits1 linkMetreUnits1 linkMoleUnits1 linkNewtonUnits2 linksSecondUnits1 link