GMT to UTC Time Converter
Convert Greenwich Mean Time to Coordinated Universal Time instantly.
Scroll the timeline to check any hour of the day.
Search any city, build a custom world clock, and plan across more time zones and options in the FlutterTime app. Free.
How the GMT to UTC time difference works
UTC is the same time as GMT. Greenwich Mean Time (GMT) is the fixed UTC+0 reference time, used by the United Kingdom and Ireland in winter.
Coordinated Universal Time (UTC) is the global time standard the world sets its clocks by.
For example, 9:00 AM GMT is 9:00 AM UTC.
Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
GMT to UTC conversion chart
| Greenwich Mean Time (GMT) |
Coordinated Universal Time (UTC) |
| 12:00 AM |
12:00 AM |
| 1:00 AM |
1:00 AM |
| 2:00 AM |
2:00 AM |
| 3:00 AM |
3:00 AM |
| 4:00 AM |
4:00 AM |
| 5:00 AM |
5:00 AM |
| 6:00 AM |
6:00 AM |
| 7:00 AM |
7:00 AM |
| 8:00 AM |
8:00 AM |
| 9:00 AM |
9:00 AM |
| 10:00 AM |
10:00 AM |
| 11:00 AM |
11:00 AM |
| 12:00 PM |
12:00 PM |
| 1:00 PM |
1:00 PM |
| 2:00 PM |
2:00 PM |
| 3:00 PM |
3:00 PM |
| 4:00 PM |
4:00 PM |
| 5:00 PM |
5:00 PM |
| 6:00 PM |
6:00 PM |
| 7:00 PM |
7:00 PM |
| 8:00 PM |
8:00 PM |
| 9:00 PM |
9:00 PM |
| 10:00 PM |
10:00 PM |
| 11:00 PM |
11:00 PM |
Best time to meet
A standard 9 to 5 workday overlaps from 9:00 AM to 5:00 PM GMT (9:00 AM to 5:00 PM UTC). Schedule inside that window to catch both coasts during business hours.
Cities in each time zone
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
Coordinated Universal Time (UTC)
ReykjavikAccraDakarAbidjanBamako
GMT to UTC questions
Is UTC ahead of or behind GMT?
UTC is the same time as GMT. So 9:00 AM GMT is 9:00 AM UTC, and 5:00 PM GMT is 5:00 PM UTC.
What time is it in UTC when it is 12:00 PM GMT?
When it is 12:00 PM (noon) GMT in Greenwich Mean Time, it is 12:00 PM UTC in Coordinated Universal Time.
How many hours difference is there between GMT and UTC?
GMT and UTC are in the same time zone, so there is no time difference.
Do GMT and UTC observe daylight saving time?
Neither Greenwich Mean Time nor Coordinated Universal Time shifts its clocks for daylight saving time, and they share the same offset, so they stay in sync all year. The United Kingdom and Ireland use GMT only in winter; from late March to late October they switch to British Summer Time (BST), one hour ahead of GMT.
What is the best time to schedule a meeting between GMT and UTC?
A standard 9-to-5 workday overlaps from 9:00 AM to 5:00 PM GMT (9:00 AM to 5:00 PM UTC). Scheduling inside that window keeps the call during business hours in both Greenwich Mean Time and Coordinated Universal Time.
Which cities use GMT and UTC?
Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester. Coordinated Universal Time (UTC) covers cities such as Reykjavik, Accra, Dakar, Abidjan, Bamako.
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