(Incomplete)
| Isotope | Abundance | T½ (s) | Decay |
| 8C | | | |
| 9C | | | |
| 10C | | | |
| 11C | | | |
| 12C | 98.94 % | Stable | - |
| 13C | 1.06 % | Stable | - |
| 14C | | | |
| 15C | | | |
| 16C | | | |
| 17C | | | |
| 18C | | | |
| 19C | | | |
| 20C | | | |
| 22C | | | |
Note: No 21C isotope.
All data from [6].
| α: | alpha particle emission (4He nucleus) |
| β+: | emission of an anti-electron and a neutrino. A proton inside the nucleus is transformed into a neutron |
| β-: | emission of an electron and an anti-neutrino. A neutron inside the nucleus is transformed into a proton |
| ec: | electron capture: capture of one orbital electron by the the nucleus. A proton inside the nucleus is transformed into a neutron plus a neutrino |
| SF: | Spontaneous Fission: a nucleus spontaneously splits into fragment nuclides |
| IT: | Isomeric Transition: a level above the ground state decays via electromagnetic process |
| n: | neutron emission |
| p: | proton emission |
| β- n (and similar): | beta- decay followed by delayed neutron emission |
| 