Special relativity (time dilation) Calculator

Calculates the time dilation of a body moving for some time with some relative velocity with respect to the observer.

Elapsed time at a body T0
    1. sec
Relative velocity v
    1. km/s
    2. ≦c

Elapsed time at observer T
    1.  
    2. sec
Velocity ratio to light v/c
    1.  
    2. %
    Special relativity (time dilation)
    [1-10] /179Disp-Num
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    [1]  2021/08/07 03:16   40 years old level / An engineer / Useful /
    Purpose of use
    Wondered how fast a space ship would have to be going to make the trip to Proxima Centauri take only 15 minutes for the people on the ship.
    [2]  2021/07/12 00:44   30 years old level / An office worker / A public employee / Very /
    Purpose of use
    calculating when starships would arrive in relative time to each other for building an TTRPG setting.
    [3]  2021/06/19 01:13   30 years old level / Others / Useful /
    Purpose of use
    Calculating time dilation for spacecraft traveling to tau ceti star from earth. Reading Andy Weir's book Project Hail Mary.
    [4]  2021/06/04 17:34   Under 20 years old / High-school/ University/ Grad student / A little /
    Purpose of use
    essayabout time travel
    Comment/Request
    would like to be able to select time in years instead of seconds
    [5]  2021/04/18 01:44   50 years old level / An engineer / Very /
    Purpose of use
    In my Air Force career flying for over 21 years, curious as to how much I actually aged.
    [6]  2021/04/16 04:08   40 years old level / Others / Useful /
    Purpose of use
    I'm trying to recalibrate my time pod. I finally made it to a century with a primitive version of the internet, please somebody hel
    [7]  2021/04/10 03:51   30 years old level / An office worker / A public employee / Very /
    Purpose of use
    learn about time dilation for fun
    [8]  2021/02/17 10:18   30 years old level / A teacher / A researcher / Useful /
    Purpose of use
    Calculate the time dilation of Perseverance on it's way to Mars.
    [9]  2021/01/19 21:18   30 years old level / Others / A little /
    Purpose of use
    Calculating time difference between someone living at equator vs artic circle.
    [10]  2020/12/13 18:07   20 years old level / Others / Useful /
    Purpose of use
    to determine what fraction of c a muon would need to travel in an accelerator to have a decay rate on the order of seconds relative to outside observers
    Comment/Request
    This calculator would infinitely improved if you could manipulate units, rearrange input/output parameters, and if it had a key for acceptable inputs or a broader range of acceptable inputs to convey the same meaning. For example if one could input in units of a fraction of c or different units besides km/s and intervals of time other than seconds. Also I had to discover your acceptable input notation for scientific notation by trail and error.
    Otherwise it was helpful and accurate.

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