GMT to UTC Time Converter

Convert Greenwich Mean Time (GMT) to Coordinated Universal Time (UTC). Both time zones are shown live below; current offset between them is 1 hour behind.

London · Greenwich Mean Time
21:55:26
Sunday, May 10, 2026
GMT+1 · UTC+01:00
UTC · Coordinated Universal Time
20:55:26
Sunday, May 10, 2026
UTC · UTC+00:00

Convert a specific time

From: GMT (London)
To: UTC (UTC)
--:--

Daylight Saving status right now

GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00
UTC (Coordinated Universal Time)
Observes DST
No

Heads up: GMT observes DST while UTC does not. The 1-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can GMT and UTC meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
GMT
UTC
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in London (GMT). Each row shows the local working-hours state in that zone for the same moment in time.
7 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 10:00–16:00 GMT (09:00–15:00 UTC).

Hour-by-hour GMT to UTC conversion table

GMT time (London)UTC time (UTC)Status
00:00 Sun23:00 SatOff-hours both sides
01:00 Sun00:00 SunOff-hours both sides
02:00 Sun01:00 SunOff-hours both sides
03:00 Sun02:00 SunOff-hours both sides
04:00 Sun03:00 SunOff-hours both sides
05:00 Sun04:00 SunOff-hours both sides
06:00 Sun05:00 SunOff-hours both sides
07:00 Sun06:00 SunOff-hours both sides
08:00 Sun07:00 SunOff-hours both sides
09:00 Sun08:00 SunGMT working
10:00 Sun09:00 SunBoth at work
11:00 Sun10:00 SunBoth at work
12:00 Sun11:00 SunBoth at work
13:00 Sun12:00 SunBoth at work
14:00 Sun13:00 SunBoth at work
15:00 Sun14:00 SunBoth at work
16:00 Sun15:00 SunBoth at work
17:00 Sun16:00 SunUTC working
18:00 Sun17:00 SunOff-hours both sides
19:00 Sun18:00 SunOff-hours both sides
20:00 Sun19:00 SunOff-hours both sides
21:00 Sun20:00 SunOff-hours both sides
22:00 Sun21:00 SunOff-hours both sides
23:00 Sun22:00 SunOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham
Coordinated Universal Time (UTC)
IANA identifier
UTC
Current UTC offset
UTC+00:00
Current abbreviation
UTC
Major cities in this zone
UTC

Sun today in London and UTC

London
Sunrise
05:18
Sunset
20:38
Solar noon
12:58
Daylight
15h 20m

Related converters

UTC to GMT (reverse)GMT to ESTGMT to PSTGMT to CETGMT to ISTGMT to JSTEST to UTCPST to UTCCET to UTCIST to UTCJST to UTC
Looking for local time? See time in London or time in UTC.

Frequently asked questions

What is the time difference between GMT and UTC right now?+
UTC (Coordinated Universal Time) is currently 1 hour behind GMT (Greenwich Mean Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does GMT or UTC observe daylight saving time?+
GMT: observes daylight saving time. UTC: does not observe daylight saving time.
When is the best time to schedule a meeting between GMT and UTC?+
The strongest overlap is 10:00–16:00 GMT (09:00–15:00 UTC), giving 7 hours when both sides are within standard 9am-5pm working hours.
What time is it in UTC when it is 12:00 noon in London?+
When it is 12:00 Sun in London (GMT), it is 11:00 Sun in UTC (UTC).
Which IANA time zone identifiers are used for GMT and UTC?+
GMT maps to "Europe/London" in the IANA database. UTC maps to "UTC". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is London ahead of or behind UTC?+
Whether London (GMT) is ahead of or behind UTC (UTC) depends on the current UTC offsets. Right now UTC is 1 hour behind GMT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for GMT and UTC?+
GMT is UTC+01:00 (GMT+1) and UTC is UTC+00:00 (UTC). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both GMT and UTC?+
Yes. There are 7 hours of overlap during standard 9am-5pm working hours, with the strongest window at 10:00–16:00 GMT.