# 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 sec Relative velocity v km/s≦c 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit Elapsed time at observer T sec Velocity ratio to light v/c %
Special relativity (time dilation)
 [1-10] /171 Disp-Num5103050100200
[1]  2021/01/20 06:18   Male / 30 years old level / Others / A little /
Purpose of use
Calculating time difference between someone living at equator vs artic circle.
[2]  2020/12/14 03:07   Male / 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.
[3]  2020/12/06 09:48   Male / 60 years old level or over / A retired person / Useful /
Purpose of use
Developing a humorous explanation of how I managed to do the Saturday crossword in about 60% of my average time.
[4]  2020/11/18 10:27   Male / 50 years old level / An office worker / A public employee / Useful /
Purpose of use
Curious about the time dilation effect of our current speed of travel on Earth as it moves on it's axis, around the Sun, around the galaxy and through the universe versus a hypothetical stationary observer.
[5]  2020/11/16 14:56   Male / Under 20 years old / Self-employed people / Very /
Purpose of use
General curiosity and not wanting to do calculations/make my own calculator.
[6]  2020/09/05 11:25   Male / 60 years old level or over / - / Very /
Purpose of use
To calculate how old someone travelling for a long time at relativistic speeds really is. Fiction writing.
[7]  2020/08/18 07:07   Male / 20 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
calculating elapsed time for relativistic space travellers
Comment/Request
Would be handy to be able to enter speed as a fraction of c. But overall this is quite handy as-is
[8]  2020/08/18 07:06   Male / 20 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
calculating elapsed time for relativistic space travellers
Comment/Request
Would be handy to be able to enter speed as a fraction of c. But overall this is quite handy as-is
[9]  2020/08/16 03:59   Male / 30 years old level / An office worker / A public employee / Not at All /
Purpose of use
Looking for a way to calculate time dilations either by putting in the time difference or by using a % of C; I'm watching a Game Theory episode and MatPat severely goofed, somehow missing that you can have a decimal in a % of C.
Comment/Request
Allow at least entering a % of C to calculate the time dilation.
[10]  2020/08/14 20:57   Female / 30 years old level / An engineer / Very /
Purpose of use
The concept of Time is just mind-blowing!
Comment/Request
Fine as is.

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