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Convert Greenwich Mean Time to Coordinated Universal Time (UTC)

GMT · UTC+1 → UTC · UTC+0

GMT is 1 hour ahead of UTC

London · BST

Tuesday, 8 September 2026

· UTC

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
LondonBST · +01:00
0003060912151821
UTC · +00:00
2302050811141720

Shared working hours: 10:00–18:00 in London is 09:00–17:00 in .

Working (09–18) Awake, off the clock Asleep (23–07)

Pick a time and share it

08:05 Tue 8 Sep London = 07:05 Tue 8 Sep

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Hour-by-hour conversion

London (GMT) (UTC)
00:0023:00prev. day
01:0000:00
02:0001:00
03:0002:00
04:0003:00
05:0004:00
06:0005:00
07:0006:00
08:0007:00Now
09:0008:00
10:0009:00Both at work
11:0010:00Both at work
12:0011:00Both at work
13:0012:00Both at work
14:0013:00Both at work
15:0014:00Both at work
16:0015:00Both at work
17:0016:00Both at work
18:0017:00
19:0018:00
20:0019:00
21:0020:00
22:0021:00
23:0022:00

About this conversion

GMT here means Greenwich Mean Time, represented by London (Europe/London), currently UTC+1. UTC means Coordinated Universal Time (UTC), represented by (UTC), currently UTC+0.

GMT is used by 22 zones, including United Kingdom. If you meant a different one, see every meaning of GMT.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in London; day boundaries are marked where the date differs.

Quick answers

  • 09:00 GMT is 08:00 UTC
  • 12:00 GMT is 11:00 UTC
  • 15:00 GMT is 14:00 UTC
  • 18:00 GMT is 17:00 UTC

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