Convert GMT to EST
EST = GMT −5 h
EST is 5 hours behind GMT. GMT is always UTC+0 and EST is always UTC−5, so this gap is the same on every date.
GMT · Greenwich Mean Time · UTC+0
12:13PM
Tuesday, November 3, 2026
EST · Eastern Standard Time · UTC−5
7:13AM
Tuesday, November 3, 2026
The UK is on GMT (UTC+0) right now.
New York is on EST (UTC−5) right now.
- Next clock change: March 14, 2027. New York moves to EDT (UTC−4), so New York is then 4 hours behind the UK.
- Next clock change: March 28, 2027. The UK moves to BST (UTC+1), so New York is then 5 hours behind the UK.
- Next clock change: October 31, 2027. The UK moves to GMT (UTC+0), so New York is then 4 hours behind the UK.
- Next clock change: November 7, 2027. New York moves to EST (UTC−5), so New York is then 5 hours behind the UK.
GMT to EST for every hour
Each EST column holds for part of the year (dates in the header for 2027). The first uses the fixed offsets (GMT UTC+0, EST UTC−5); the others give local clock time when daylight saving time changes the gap. Until 5:00 AM GMT, EST is still on the previous calendar day.
| GMT | EST −5 hfixed offsets | EST −4 hMar 14 – Mar 28, Oct 31 – Nov 7 | 24-hour |
|---|---|---|---|
| 12:00 AM | 7:00 PM −1 day | 8:00 PM −1 day | 00:00 → 19:00 |
| 1:00 AM | 8:00 PM −1 day | 9:00 PM −1 day | 01:00 → 20:00 |
| 2:00 AM | 9:00 PM −1 day | 10:00 PM −1 day | 02:00 → 21:00 |
| 3:00 AM | 10:00 PM −1 day | 11:00 PM −1 day | 03:00 → 22:00 |
| 4:00 AM | 11:00 PM −1 day | 12:00 AM | 04:00 → 23:00 |
| 5:00 AM | 12:00 AM | 1:00 AM | 05:00 → 00:00 |
| 6:00 AM | 1:00 AM | 2:00 AM | 06:00 → 01:00 |
| 7:00 AM | 2:00 AM | 3:00 AM | 07:00 → 02:00 |
| 8:00 AM | 3:00 AM | 4:00 AM | 08:00 → 03:00 |
| 9:00 AM | 4:00 AM | 5:00 AM | 09:00 → 04:00 |
| 10:00 AM | 5:00 AM | 6:00 AM | 10:00 → 05:00 |
| 11:00 AM | 6:00 AM | 7:00 AM | 11:00 → 06:00 |
| 12:00 PM | 7:00 AM | 8:00 AM | 12:00 → 07:00 |
| 1:00 PM | 8:00 AM | 9:00 AM | 13:00 → 08:00 |
| 2:00 PM | 9:00 AM | 10:00 AM | 14:00 → 09:00 |
| 3:00 PM | 10:00 AM | 11:00 AM | 15:00 → 10:00 |
| 4:00 PM | 11:00 AM | 12:00 PM | 16:00 → 11:00 |
| 5:00 PM | 12:00 PM | 1:00 PM | 17:00 → 12:00 |
| 6:00 PM | 1:00 PM | 2:00 PM | 18:00 → 13:00 |
| 7:00 PM | 2:00 PM | 3:00 PM | 19:00 → 14:00 |
| 8:00 PM | 3:00 PM | 4:00 PM | 20:00 → 15:00 |
| 9:00 PM | 4:00 PM | 5:00 PM | 21:00 → 16:00 |
| 10:00 PM | 5:00 PM | 6:00 PM | 22:00 → 17:00 |
| 11:00 PM | 6:00 PM | 7:00 PM | 23:00 → 18:00 |
Bold rows fall inside office hours (9:00 to 17:00) on both sides. The dot marks the current GMT hour.
The GMT times people look up most
| GMT | EST −5 h | EST −4 h |
|---|---|---|
| 12:00 PM | 7:00 AM | 8:00 AM |
| 11:00 AM | 6:00 AM | 7:00 AM |
| 9:00 AM | 4:00 AM | 5:00 AM |
| 10:00 AM | 5:00 AM | 6:00 AM |
| 10:00 PM | 5:00 PM | 6:00 PM |
| 7:00 PM | 2:00 PM | 3:00 PM |
| 1:00 PM | 8:00 AM | 9:00 AM |
Does the difference change during the year?
As written, no: GMT is always UTC+0 and EST is always UTC−5, so the gap is 5 hours on every date. But the UK uses GMT only in winter and New York uses EST only in winter, and people often keep writing “GMT” when they mean the local time. Between the local clocks of the UK and New York, the gap is 5 hours or 4 hours:
| From | What changes | The UK | New York | EST vs GMT |
|---|---|---|---|---|
| January 1 | Start of the year | GMT (UTC+0) | EST (UTC−5) | −5 h |
| March 8 | New York moves to EDT (UTC−4) | GMT (UTC+0) | EDT (UTC−4) | −4 h |
| March 29 | The UK moves to BST (UTC+1) | BST (UTC+1) | EDT (UTC−4) | −5 h |
| October 25 | The UK moves to GMT (UTC+0) | GMT (UTC+0) | EDT (UTC−4) | −4 h |
| November 1 | New York moves to EST (UTC−5) | GMT (UTC+0) | EST (UTC−5) | −5 h |
| From | What changes | The UK | New York | EST vs GMT |
|---|---|---|---|---|
| January 1 | Start of the year | GMT (UTC+0) | EST (UTC−5) | −5 h |
| March 14 | New York moves to EDT (UTC−4) | GMT (UTC+0) | EDT (UTC−4) | −4 h |
| March 28 | The UK moves to BST (UTC+1) | BST (UTC+1) | EDT (UTC−4) | −5 h |
| October 31 | The UK moves to GMT (UTC+0) | GMT (UTC+0) | EDT (UTC−4) | −4 h |
| November 7 | New York moves to EST (UTC−5) | GMT (UTC+0) | EST (UTC−5) | −5 h |
Converting GMT to EST by hand
With the fixed offsets, take away 5 hours: 3:30 PM GMT is 10:30 AM EST.
With the −4 h gap (Mar 14 – Mar 28, Oct 31 – Nov 7), take away 4 hours: 3:30 PM GMT is 11:30 AM EST.
Going back from EST to GMT, do the opposite: the EST to GMT page has its own table.
Where the GMT and EST working days overlap
GMT to EST (−5 h): Two 9:00–17:00 days share 3 hours: 2:00 PM to 5:00 PM GMT, which is 9:00 AM to 12:00 PM EST.
−4 h (from Mar 14 to Mar 28 and Oct 31 to Nov 7, 2027): Two 9:00–17:00 days share 4 hours: 1:00 PM to 5:00 PM GMT, which is 9:00 AM to 1:00 PM EST.
A meeting fixed in one city’s calendar moves by an hour for the other when the gap changes. Calendar apps handle this when the event is saved in a named zone (for example Europe/London) rather than as a fixed offset.
What GMT and EST mean
Greenwich Mean Time
GMT is UTC+0. For conversions it equals UTC: the two have stayed within 0.9 seconds of each other, so they agree unless fractions of a second matter. The UK uses GMT only in winter; in summer it is on BST, UTC+1.
Eastern Standard Time
EST is UTC−5. The US East Coast and eastern Canada (New York, Washington, Miami, Toronto, Montreal) use it only in winter; from the second Sunday of March to the first Sunday of November they are on EDT, UTC−4. Jamaica, Panama and Cancún keep it all year, and since 2026 so does Manitoba (Winnipeg).