The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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Constants in the category " Universal constants "...

characteristic impedance of vacuum
electric constant
magnetic constant
Newtonian constant of gravitation
Newtonian constant of gravitation over h-bar c
Planck constant
Planck constant in eV s
Planck constant over 2 pi
Planck constant over 2 pi in eV s
Planck constant over 2 pi times c in MeV fm
Planck length
Planck mass
Planck mass energy equivalent in GeV
Planck temperature
Planck time
speed of light in vacuum


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