Find dilated time t = γ t₀ with γ = 1 / √(1 − v²/c²) for a moving clock.
| Dilated time (s) | – |
| γ | – |
Use this calculator for special-relativistic time dilation: t₀ is proper time on the clock that moves with the object; t is that interval in a frame where the object moves at speed v.
v must stay below c (2.99792458×10⁸ m/s). At 1×10⁸ m/s, γ is only about 1.06; near c it grows quickly. Gravity (general relativity) is a different dilation.
Proper time (s): Time on the moving clock, in seconds.
Speed (m/s): Speed relative to the observer, less than c.
Dilated time (s): t = γ t₀.
γ: Lorentz factor 1 / √(1 − v²/c²).
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