GMT to London time conversion
London is 1 hour ahead of GMT. After the next clock change (): London has the same time as GMT.
Time difference with your location
GMT has the same time as UTC. Compare with your local time →
Choose a date and time
Choose the local time in GMT to convert it to London on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · GMT → London
This table converts each hour in GMT to London on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| GMT | London | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 01:001:00 AM | |
| 01:001:00 AM | 02:002:00 AM | |
| 02:002:00 AM | 03:003:00 AM | |
| 03:003:00 AM | 04:004:00 AM | |
| 04:004:00 AM | 05:005:00 AM | |
| 05:005:00 AM | 06:006:00 AM | |
| 06:006:00 AM | 07:007:00 AM | |
| 07:007:00 AM | 08:008:00 AM | |
| 08:008:00 AM | 09:009:00 AM | ✓ |
| 09:009:00 AM | 10:0010:00 AM | ✓ |
| 10:0010:00 AM | 11:0011:00 AM | ✓ |
| 11:0011:00 AM | 12:0012:00 PM | ✓ |
| 12:0012:00 PM | 13:001:00 PM | ✓ |
| 13:001:00 PM | 14:002:00 PM | ✓ |
| 14:002:00 PM | 15:003:00 PM | ✓ |
| 15:003:00 PM | 16:004:00 PM | ✓ |
| 16:004:00 PM | 17:005:00 PM | ✓ |
| 17:005:00 PM | 18:006:00 PM | |
| 18:006:00 PM | 19:007:00 PM | |
| 19:007:00 PM | 20:008:00 PM | |
| 20:008:00 PM | 21:009:00 PM | |
| 21:009:00 PM | 22:0010:00 PM | |
| 22:0010:00 PM | 23:0011:00 PM | |
| 23:0011:00 PM | 00:0012:00 AM +1 day |
Quick conversion examples
These examples use GMT (UTC+0) and London (UTC+1); choosing a date applies the local clock changes.
Conversion formula: London = GMT + 1h · UTC · UTC + 1h.
| GMT | London |
|---|---|
| 6:00 AM GMT | = 7:00 AM London |
| 7:00 AM GMT | = 8:00 AM London |
| 8:00 AM GMT | = 9:00 AM London |
| 9:00 AM GMT | = 10:00 AM London |
| 10:00 AM GMT | = 11:00 AM London |
| 12:00 PM GMT | = 1:00 PM London |
| 3:00 PM GMT | = 4:00 PM London |
| 5:00 PM GMT | = 6:00 PM London |
| 6:00 PM GMT | = 7:00 PM London |
| 8:00 PM GMT | = 9:00 PM London |
Overlapping meeting hours
The 08:00–18:00 working day in GMT and London overlaps for 9 hours on 2026-10-21.
- Shared working hours
- 08:00–17:00 GMT · 09:00–18:00 London
Clock changes on both sides, 2026–2028
GMT and London have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | GMT | London |
|---|---|---|
| 2026 | No clock changes; UTC+0 all year. | · 01:00 → 02:00 · 02:00 → 01:00 |
| 2027 | No clock changes; UTC+0 all year. | · 01:00 → 02:00 · 02:00 → 01:00 |
| 2028 | No clock changes; UTC+0 all year. | · 01:00 → 02:00 · 02:00 → 01:00 |
At the start of 2026, London has the same time as UTC. The difference changes during the following periods.
- From 2026-03-29 01:00 UTC until 2026-10-25 01:00 UTC, London is 1 hour ahead of UTC.
- From 2027-03-28 01:00 UTC until 2027-10-31 01:00 UTC, London is 1 hour ahead of UTC.
- From 2028-03-26 01:00 UTC until 2028-10-29 01:00 UTC, London is 1 hour ahead of UTC.
Frequently asked questions
What time is 9 AM GMT in London?
9:00 AM GMT = 10:00 AM London, using UTC+0 and UTC+1. Choose a date above for the seasonal local time.
Does the time difference between GMT and London change during the year?
Yes. During 2026–2028: London has the same time as GMT; London is 1 hour ahead of GMT. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in London?
Read the London clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between GMT and London?
The shared 08:00–18:00 working window is 08:00–17:00 UTC / 09:00–18:00 London, a total of 9 hours.
What is the time difference between GMT and London now?
Right now, London is 1 hour ahead of UTC. Conversion formula: London = GMT + 1h · UTC · UTC + 1h.