Coordinated Universal Time (utc) is used in United Kingdom. The IANA timezone identifier is UTC.

Greenwich Mean Time (gmt) is used in United Kingdom. The IANA timezone identifier is Europe/London.

UTC to GMT Time Converter

Coordinated Universal Time → Greenwich Mean Time

UTC = UTC+0GMT = UTC+1

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

GMT (London)

United Kingdom · UTC±0

09:00

New York

USA · -5h

04:00

Tokyo

Japan · +8h

17:00

Dubai

United Arab Emirates · +3h

12:00

Sydney

Australia · +9h

18:00

Time difference: UTC (London) and GMT (London)

UTC (London) is 1 hour behind GMT (London). Midday in UTC (London) lines up with 13:00 in GMT (London).

UTC (London) is in the Europe/London timezone. GMT (London) is in Europe/London. The difference is 1 hour.

Business hours comparison

There is a 7-hour window each day where both UTC (London) and GMT (London) are within standard business hours (09:00–17:00).

00:0006:0012:0018:0024:00

UTC (London)

GMT (London)

Overlap (7h)

When to schedule across time zones

Both UTC (London) and GMT (London) are in standard hours simultaneously for 7h per day. 3 recommended slots shown below.

09:00 London / 10:00 London✓ Both working

10:00 London / 11:00 London✓ Both working

11:00 London / 12:00 London✓ Both working

Based on standard 09:00–17:00 working hours in each location's local time.

Upcoming public holidays

UTC (London)

No upcoming public holidays this year.

GMT (London)6 holidays

Jul 13Battle of the Boyne

Aug 3Summer Bank Holiday

Aug 31Summer Bank Holiday

Nov 30Saint Andrew's Day

Dec 25Christmas Day

How to work with UTC (London) and GMT (London) time zones

Working across UTC (London) (United Kingdom) and GMT (London) (United Kingdom) involves a 1-hour gap. The good news: there is a 7-hour mutual window in standard business hours that lets both sides collaborate without anyone joining at an unreasonable hour.

💡 How to schedule across these time zones

✅

09:00–10:00 in UTC (London) = 10:00–11:00 in GMT (London). Both sides are in standard business hours during this window.

✅

10:00–11:00 in UTC (London) = 11:00–12:00 in GMT (London). Both sides are in standard business hours during this window.

✅

11:00–12:00 in UTC (London) = 12:00–13:00 in GMT (London). Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in UTC (London). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

UTC (London) ↔ GMT (London)

7h of business hours overlap daily (09:00–17:00)

UTC (London)

GMT (London)

00:00

01:00

02:00

03:00

04:00

05:00

06:00

07:00

08:00

09:00Working

10:00Working

11:00Working

12:00Working

13:00Working

14:00Working

15:00Working

16:00Working

17:00off

17:00

18:00

19:00

20:00

21:00

22:00

23:00

00:00+1d

Working hours: 09:00–17:00 local. Green = both working. Purple = one side only.

Frequently Asked Questions

What is the difference between utc and gmt?

Coordinated Universal Time (utc) is UTC+0 and Greenwich Mean Time (gmt) is UTC+1. The difference between them is 1 hours.

Where is utc used?

Coordinated Universal Time (utc) is used in United Kingdom and surrounding regions. The IANA timezone identifier is UTC.

Where is gmt used?

Greenwich Mean Time (gmt) is used in United Kingdom and surrounding regions. The IANA timezone identifier is Europe/London.

How do I convert utc to gmt?

Use the interactive converter above. Drag the time slider to any utc time and the gmt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.

Popular UTC conversions

UTC → New York UTC → Tokyo UTC → Dubai UTC → Sydney UTC → Paris UTC → Berlin UTC → Singapore UTC → Los Angeles UTC → Toronto UTC → Mumbai

Popular GMT conversions

New York → GMT Tokyo → GMT Dubai → GMT Sydney → GMT Paris → GMT Berlin → GMT Singapore → GMT Los Angeles → GMT Toronto → GMT Mumbai → GMT