How do you convert GMT to EST?

Use EST = GMT − 5 hours. For 01:00 GMT that gives 20:00 EST.

What does 01:00 GMT actually mean?

It sits between 0 and 6 GMT; the table on this page shows how those compare.

01:00 GMT to EST

20:00 EST

01:00 Greenwich Mean Time equals 20:00 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 → 20:00 EST

Going the other way: 20:00 EST to GMT.

Convert a different time zone

GMT =20:00 EST

Open the full time zone converter for every other unit.

Nearby values

GMT	EST
00:00 GMT	19:00 EST
02:00 GMT	21:00 EST
03:00 GMT	22:00 EST
04:00 GMT	23:00 EST
05:00 GMT	00:00 EST
06:00 GMT	01:00 EST

Questions

What is 01:00 GMT in EST?: 01:00 GMT is 20:00 EST.
How do you convert GMT to EST?: Use EST = GMT − 5 hours. For 01:00 GMT that gives 20:00 EST.
What does 01:00 GMT actually mean?: It sits between 0 and 6 GMT; the table on this page shows how those compare.