Earth Radius | Rotational Circumference | Distance to Equator and Pole | Earth's Curvature | Time Difference

Calculator for Time Difference by Latitude and Distance

Calculates the difference in true local time between two points on Earth that are at the same latitude. True local time is the time that would apply at a location if the sun reached its highest point there at exactly 12 noon. Only a few points on Earth have true local time. Germany for example has Central European Time (CET) during standard time, which refers to the 15th degree of longitude east. The city of Görlitz is almost located on this latitude, so it has almost true local time. When daylight saving time is in effect, there is no such city in Germany.

Please select two points that are at the same latitude and enter this latitude as well as the distance between them in kilometers. The time difference between the two points is calculated in hours, minutes, and seconds. The point further east is ahead of the point further west by this time in terms of true local time. The calculation is made as if both points were at sea level; although they often aren't, the error is usually negligible. The time offset is the distance between the two points divided by the rotational circumference, multiplied by 24 hours. If the calculated time offset is more than 24 hours, then the entered distance between the two locations is greater than the rotational circumference at that latitude.

Example: On the equator, i.e., the latitude 0, 1000 kilometers correspond to a time shift from true local time of just under 36 minutes. At latitude 30, it is approximately 41 minutes and 32 seconds, at latitude 50, it is 56 minutes, and at latitude 80, the time shift is just under three and a half hours. The reason for this is that the greater the latitude, the smaller the rotational circumference, and thus the larger the proportion of the distance to the rotational circumference.

Latitude:
Distance:		km