How do you convert GMT to EST?

Use EST = GMT − 5 hours. For 20:00 GMT that gives 15:00 EST.

What does 20:00 GMT actually mean?

It sits between 17 and 23 GMT; the table on this page shows how those compare.

20:00 GMT to EST

15:00 EST

20:00 Greenwich Mean Time equals 15:00 Eastern Standard Time.

These are standard-time offsets, which never change. What changes is which one a place observes: New York is on EST in winter but EDT (an hour later) during daylight saving, and the UK is on GMT in winter and BST in summer. If you mean "the time in New York right now", use the full converter — it reads live offsets.

How the conversion works

This one is a formula rather than a single multiplier:

EST = GMT − 5 hours → 15:00 EST

Going the other way: 15:00 EST to GMT.

Convert a different time zone

GMT =15:00 EST

Open the full time zone converter for every other unit.

Nearby values

GMT	EST
17:00 GMT	12:00 EST
18:00 GMT	13:00 EST
19:00 GMT	14:00 EST
21:00 GMT	16:00 EST
22:00 GMT	17:00 EST
23:00 GMT	18:00 EST

Questions

What is 20:00 GMT in EST?: 20:00 GMT is 15:00 EST.
How do you convert GMT to EST?: Use EST = GMT − 5 hours. For 20:00 GMT that gives 15:00 EST.
What does 20:00 GMT actually mean?: It sits between 17 and 23 GMT; the table on this page shows how those compare.