How do you convert EST to GMT?

Use GMT = EST + 5 hours. For 13:00 EST that gives 18:00 GMT.

What does 13:00 EST actually mean?

It sits between 10 and 16 EST; the table on this page shows how those compare.

13:00 EST to GMT

18:00 GMT

13:00 Eastern Standard Time equals 18:00 Greenwich Mean 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:

GMT = EST + 5 hours → 18:00 GMT

Going the other way: 18:00 GMT to EST.

Convert a different time zone

EST =18:00 GMT

Open the full time zone converter for every other unit.

Nearby values

EST	GMT
10:00 EST	15:00 GMT
11:00 EST	16:00 GMT
12:00 EST	17:00 GMT
14:00 EST	19:00 GMT
15:00 EST	20:00 GMT
16:00 EST	21:00 GMT

Questions

What is 13:00 EST in GMT?: 13:00 EST is 18:00 GMT.
How do you convert EST to GMT?: Use GMT = EST + 5 hours. For 13:00 EST that gives 18:00 GMT.
What does 13:00 EST actually mean?: It sits between 10 and 16 EST; the table on this page shows how those compare.