About GMT and EST
Greenwich Mean Time (GMT, UTC+0) covers London in winter, Reykjavik and Accra, and fixed at UTC+0 (the UK switches to BST, UTC+1, in summer). Eastern Time (EST, UTC−5) covers New York, Toronto, Miami and Atlanta, and observes daylight saving (EST in winter, EDT in summer).
Because Eastern Time observes daylight saving while the other side doesn't, the difference shifts by one hour between winter and summer — the table below shows both.
How to convert GMT to EST
Check the live clocks
The current time in both zones is shown above, DST-corrected automatically.
Convert a specific time
Type a GMT time into the converter for the exact EST equivalent today.
Use the table
The hour-by-hour table covers the full day for quick scheduling.
GMT to EST conversion table
| GMT | EST (winter) | EDT (summer) |
|---|---|---|
| 12:00 AM | 7:00 PM | 8:00 PM |
| 1:00 AM | 8:00 PM | 9:00 PM |
| 2:00 AM | 9:00 PM | 10:00 PM |
| 3:00 AM | 10:00 PM | 11:00 PM |
| 4:00 AM | 11:00 PM | 12:00 AM |
| 5:00 AM | 12:00 AM | 1:00 AM |
| 6:00 AM | 1:00 AM | 2:00 AM |
| 7:00 AM | 2:00 AM | 3:00 AM |
| 8:00 AM | 3:00 AM | 4:00 AM |
| 9:00 AM | 4:00 AM | 5:00 AM |
| 10:00 AM | 5:00 AM | 6:00 AM |
| 11:00 AM | 6:00 AM | 7:00 AM |
| 12:00 PM | 7:00 AM | 8:00 AM |
| 1:00 PM | 8:00 AM | 9:00 AM |
| 2:00 PM | 9:00 AM | 10:00 AM |
| 3:00 PM | 10:00 AM | 11:00 AM |
| 4:00 PM | 11:00 AM | 12:00 PM |
| 5:00 PM | 12:00 PM | 1:00 PM |
| 6:00 PM | 1:00 PM | 2:00 PM |
| 7:00 PM | 2:00 PM | 3:00 PM |
| 8:00 PM | 3:00 PM | 4:00 PM |
| 9:00 PM | 4:00 PM | 5:00 PM |
| 10:00 PM | 5:00 PM | 6:00 PM |
| 11:00 PM | 6:00 PM | 7:00 PM |
Questions
How many hours behind is EST of GMT?
EST is 5 hours behind GMT during standard time — one hour different in the daylight-saving months (see the table).
What time is 12:00 PM GMT in EST?
Noon GMT is 7:00 AM EST in standard time; during daylight saving the offset shifts by one hour.
Does daylight saving change this conversion?
Yes — for part of the year the offset changes by one hour. The live clocks above always show the correct current times.