How can you convert GMT into local time?

Answer 1

Find out the longitude of your location in degrees, multiply by 24 and divide by 360. This gives the difference in hours between your location and the Prime (or Greenwich) Meridian. For example;

1. Longitude 10 degrees East: 10*24/360 = 0.67 hours approx., = 40 minutes.

Local time would be GMT plus 40 minutes (e.g, if the time was 11.20 GMT, local time would be 12.00);

2. Longitude 15 degrees West: 15*24/360 = 1 hour.

Local time would be GMT minus 1 hour (e.g, if the time was 11.00 GMT, local time would be 10.00).