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] /130Disp-Num
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[1]  2018/09/09 23:46   Male / 60 years old level or over / High-school/ University/ Grad student / Useful /
Purpose of use
Nice calculator
Comment/Request
It would be nice to be able to select elapsed time at a body (T0) and Elapsed time at observer (t) units, such as seconds, hour, days, years.
[2]  2018/08/23 00:21   - / - / - / - /
Purpose of use
To find out how fast I need to travel to see the sun turn into a planetary nebula.
Comment/Request
0.99999999999999996c
[3]  2018/08/13 23:22   Male / 40 years old level / Others / Very /
Purpose of use
2 Peter 3:8 seemed like time dilation of "a day is like a thousand years, and a thousand years are like a day". I converted 1 years into seconds and entered it into the calculator. From subtracting the given speed of light to the V calculated was 1.15m/s which is 2.5MPH slightly less than walking pace of a man.
[4]  2018/08/10 11:56   Male / 30 years old level / High-school/ University/ Grad student / Very /
Purpose of use
Ascertain if the Parker space probe is anywhere near relativistic velocities... A tenth of a microsecond is actually a very long... then again I work with ultrafast lasers so everything really seems to be slow to me.
Comment/Request
Better way of displaying the elapsed time at observer. It''s hard to count zeros.
[5]  2018/08/01 12:26   Male / - / High-school/ University/ Grad student / Useful /
Purpose of use
Writing a novel and I needed to know the time dilation from inside and outside perspective.
[6]  2018/07/13 14:49   Male / 20 years old level / High-school/ University/ Grad student / Useful /
Purpose of use
trying to find ways to outlive my grandson
[7]  2018/07/11 05:27   Male / 50 years old level / An office worker / A public employee / Very /
Purpose of use
Proving to my fiancé that when i move faster than here she is getting older
[8]  2018/07/05 23:44   Male / Under 20 years old / High-school/ University/ Grad student / Very /
Purpose of use
To verify my claim to my girlfriend
[9]  2018/07/01 15:35   Male / Under 20 years old / High-school/ University/ Grad student / Useful /
Purpose of use
for program checking
[10]  2018/06/11 01:41   Female / Under 20 years old / High-school/ University/ Grad student / Very /
Purpose of use
math IA

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