21:00 GMT to EST
16:00 EST
21:00 Greenwich Mean Time equals 16:00 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 → 16:00 EST
Going the other way: 16:00 EST to GMT.
Convert a different time zone
GMT =16:00 EST
Open the full time zone converter for every other unit.
Nearby values
Questions
- What is 21:00 GMT in EST?
- 21:00 GMT is 16:00 EST.
- How do you convert GMT to EST?
- Use EST = GMT − 5 hours. For 21:00 GMT that gives 16:00 EST.
- What does 21:00 GMT actually mean?
- It sits between 17 and 23 GMT; the table on this page shows how those compare.