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Convert Greenwich Mean Time to Indian Ocean Time

GMT · UTC+1 → IOT · UTC+6

GMT is 5 hours behind IOT

London · BST

Tuesday, 8 September 2026

Chagos · UTC+6

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
LondonBST · +01:00
0003060912151821
ChagosUTC+6 · +06:00
0508111417202302

Shared working hours: 09:00–13:00 in London is 14:00–18:00 in Chagos.

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

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08:05 Tue 8 Sep London = 13:05 Tue 8 Sep Chagos

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Hour-by-hour conversion

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

About this conversion

GMT here means Greenwich Mean Time, represented by London (Europe/London), currently UTC+1. IOT means Indian Ocean Time, represented by Chagos (Indian/Chagos), currently UTC+6.

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 14:00 IOT
  • 12:00 GMT is 17:00 IOT
  • 15:00 GMT is 20:00 IOT
  • 18:00 GMT is 23:00 IOT

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