pi = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412734587006606315588174881520920962829254091715364367892590360011330530548820466521384146951941511609...
characteristic impedance of vacuum 376.730 313 461... Ω defined
electric constant (permittivity of free space) 8.854 187 817... × 10-12F·m-1 defined
magnetic constant (permeability of free space) 4π × 10-7 N·A-2 = 1.2566 370 614... × 10-6 N·A-2 defined
Newtonian constant of gravitation 6.6742(10) × 10-11m3·kg-1·s-2 1.5 × 10-4
Planck's constant 6.626 0693(11) × 10-34 J·s 1.7 × 10-7
Dirac's constant 1.054 571 68(18) × 10-34 J·s 1.7 × 10-7
speed of light in vacuum 299 792 458 m·s-1 defined
Bohr magneton 927.400 949(80) × 10-26 J·T-1 8.6 × 10-8
conductance quantum 7.748 091 733(26) × 10-5 S 3.3 × 10-9
Coulomb's constant 8.987 742 438 × 109 N·m2C-2 defined
Josephson constant 483 597.879(41) × 109 Hz· V-1 8.5 × 10-8
magnetic flux quantum 2.067 833 72(18) × 10-15 Wb 8.5 × 10-8
nuclear magneton 5.050 783 43(43) × 10-27 J·T-1 8.6 × 10-8
resistance quantum 12 906.403 725(43) Ω 3.3 × 10-9
von Klitzing constant 25 812.807 449(86) Ω 3.3 × 10-9
Bohr radius 0.529 177 2108(18) × 10-10 m 3.3 × 10-9
Fermi coupling constant 1.166 39(1) × 10-5 GeV-2 8.6 × 10-6
fine-structure constant 7.297 352 568(24) × 10-3 3.3 × 10-9
Hartree energy 4.359 744 17(75) × 10-18 J 1.7 × 10-7
quantum of circulation 3.636 947 550(24) × 10-4 m2 s-1 6.7 × 10-9
Rydberg constant 10 973 731.568 525(73) m-1 6.6 × 10-12
Thomson cross section 0.665 245 873(13) × 10-28 m2 2.0 × 10-8
weak mixing angle 0.222 15(76) 3.4 × 10-3
atomic mass constant (unified atomic mass unit) 1.660 538 86(28) × 10-27 kg 1.7 × 10-7
Avogadro's number 6.022 1415(10) × 1023 1.7 × 10-7
Boltzmann constant 1.380 6505(24) × 10-23 J·K-1 1.8 × 10-6
Faraday constant 96 485.3383(83)C·mol-1 8.6 × 10-8
first radiation constant 3.741 771 38(64) × 10-16 W·m2 1.7 × 10-7
for spectral radiance 1.191 042 82(20) × 10-16 W · m2 sr-1 1.7 × 10-7
Loschmidt constant at T=273.15 K and p=101.325 kPa 2.686 7773(47) × 1025 m-3 1.8 × 10-6
gas constant 8.314 472(15) J·K-1·mol-1 1.7 × 10-6
molar Planck constant 3.990 312 716(27) × 10-10 J · s · mol-1 6.7 × 10-9
molar volume of an ideal gas at T=273.15 K and p=100 kPa 22.710 981(40) × 10-3 m3 ·mol-1 1.7 × 10-6
at T=273.15 K and p=101.325 kPa 22.413 996(39) × 10-3 m3 ·mol-1 1.7 × 10-6
Sackur-Tetrode constant at T=1 K and p=100 kPa
-1.151 7047(44) 3.8 × 10-6
at T=1 K and p=101.325 kPa -1.164 8677(44) 3.8 × 10-6
second radiation constant 1.438 7752(25) × 10-2 m·K 1.7 × 10-6
Stefan-Boltzmann constant 5.670 400(40) × 10-8 W·m-2·K-4 7.0 × 10-6
Wien displacement law constant 4.965 114 231... 2.897 7685(51) × 10-3 m · K 1.7 × 10-6
conventional value of Josephson constant2 483 597.9 × 109 Hz · V-1 defined
conventional value of von Klitzing constant3 25 812.807 Ω defined
molar mass constant 1 × 10-3 kg · mol-1 defined
of carbon-12 12 × 10-3 kg · mol−1 defined
standard acceleration of gravity (gee, free fall on Earth) 9.806 65 m·s-2 defined
standard atmosphere 101 325 Pa defined
That'll have your average phys teacher in a flutter.