| Table I. Guide to physical constants available on Google calculator. Entries are sometimes case sensitive. |
| Long Name | Shorthand |
| atomic mass units | amu or u |
| Astronomical unit | au |
| Avogadro's number | N_A |
| Boltzmann's constant | k |
| electric constant, permittivity of free space | epsilon_0 |
| electron mass | m_e |
| electron volt | eV |
| elementary charge | |
| Faraday constant | |
| fine-structure constant | |
| gravitational constant | G |
| magnetic constant, permeability of free space | mu_0 |
| magnetic flux quantum | |
| mass of the moon | m_moon |
| mass of the sun | m_sun |
| mass of [planet name] | m_mercury |
| molar gas constant | R |
| Planck's constant | h and hbar |
| proton mass | m_p |
| radius of the moon | r_moon |
| radius of the sun | s_moon |
| radius of [planet name] | r_mercury |
| Rydberg constant | |
| speed of light | c |
| speed of sound (note: in air at sea level) | |
| Stefan Boltzmann constant | |