A **time scale** specifies divisions of time.

- Time standard, a specification of either the rate at which time passes, or points in time, or both
- Duration (disambiguation), a quantity of time

- Geological time scale, a scale that divides up the history of Earth into scientifically meaningful periods

- In astronomy and astrophysics:
- Dynamical time scale
*either*(in stellar physics) measures the length of time over which changes in one part of a body can be communicated to the rest of that body,*or*(in celestial mechanics) is a realization of a time-like argument based on a dynamical theory - Nuclear time scale, estimates the lifetime of a star based solely on its rate of fuel consumption
- Thermal time scale, estimates the lifetime of a star once its fuel reserves at its center are used up or if they were to disappear

- Dynamical time scale

- In cosmology and particle physics:
- Planck time, the time scale beneath which quantum effects are comparable in significance to gravitational effects

- In mathematics:
- Time scale calculus, the unification of the theory of difference equations with differential equations

- In music:
- rhythm, a temporal pattern of events
- Time scale (music), divides up music into sections based on the scope

### Famous quotes containing the words time and/or scale:

“Old hippies don’t die, they just lie low until the laughter stops and their *time* comes round again.”

—Joseph Gallivan (b. 1964)

“I have spent all my life under a Communist regime, and I will tell you that a society without any objective legal *scale* is a terrible one indeed. But a society with no other *scale* but the legal one is not quite worthy of man either.”

—Alexander Solzhenitsyn (b. 1918)