per year
Frequencyexact by definition
Per year is 1/31,557,600 hertz, using this site's Julian year of exactly 365.25 days. It is the unit of annual rates expressed as frequencies: earthquake recurrence intervals, component failure rates, radioactive decay constants for long-lived isotopes and annual exceedance probabilities in hydrology.
Watch out: An annual exceedance frequency of 0.01 per year is the "100-year event", which is a rate rather than a schedule. Two such events in consecutive years is unremarkable, and over a 30-year design life the probability of at least one is about 26%.
| 1 | 3.1688088e-08 |
One per year in every frequency unit
| 31.6881 | nanohertz (nHz) | |
| 1 | per year (1/yr)this unit | |
| 0.0316881 | microhertz (μHz) | |
| 0.00273785 | per day (1/d) | |
| 0.000114077 | per hour (1/h) | |
| 0.0000316881 | millihertz (mHz) | |
| 0.00000190129 | revolution per minute (rpm) | |
| 0.00000190129 | cycle per minute (cpm) | |
| 0.00000190129 | beat per minute (bpm) | |
| 3.16881e-08 | hertz (Hz) | |
| 3.16881e-08 | cycle per second (cps) | |
| 3.16881e-08 | revolution per second (rev/s) | |
| 3.16881e-11 | kilohertz (kHz) | |
| 3.16881e-14 | megahertz (MHz) | |
| 3.16881e-17 | gigahertz (GHz) | |
| 3.16881e-20 | terahertz (THz) | |
| 3.16881e-23 | petahertz (PHz) |
Solvers that use frequency