speed of light in vacuum: c = 299 792 458 m s-1 uncertainty exact
Permeability the void: m0 = 4p x 7.10 = 12.566 370 614 ... x 10-7 N A-2 uncertainty exact
Permittivity of vacuum: e0 = 8.854 187 817 ... x 10-12 F m-1 uncertainty exact
characteristic impedance of the vacuum: Z0 = 3.76730 313 461 ... 102 W x uncertainty
exact gravitational constant: G = 6.673 (10) x 10-11 m3 kg-1 s-2 uncertainty: 1.5 x 10-3
Planck constant: h = 6.626 068 76 (52 ) x 10-34 J s uncertainty 7.8 x 10-8
Planck mass (hc / G) 1 / 2: MP = 2.1767 (16) x 10-8 Kg uncertainty: 7.5 x 10 - 4
Planck length (h / c MP = (h G / c3) 1 / 2): IP = 1.6160 (12) x 10-35 m uncertainty 7.5 x 10-4
Planck time (lP / c) tP = 5.3906 (40) x 10-44 s uncertainty 7.5 x 10-4
