# Calculate Time Dilation

Calculator for the time inside and outside of very fast moving objects close to the speed of light. The time dilation due to speed is an effect of the special theory of relativity. It causes time to run slower within a moving system, i.e. less time passes than outside. This effect is only noticeable at very high velocities.
Please specify a velocity and optionally a time in rest. The Lorentz factor and the passed time at the corresponding velocity are calculated. One year is calculated as 365.2421875 days.
The Lorentz factor γ is the ratio between the two time spans, the formula for the calculation is γ = 1 / √ 1 - (v/c)²

Passed time in rest
 Years: Days: Hours: Minutes: Seconds:
 Velocity v: m/skm/hmphmach% c Speed of light c: m/s
Round to    decimal places.

Lorentz factor γ:
Passed time at velocity
 Years: Days: Hours: Minutes: Seconds: Single time unit: yearsdayshoursminutesseconds

Example: at half the speed of light (50% c) the Lorentz factor is 1.155, 10 years at rest refer to 8.66 years in motion.

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