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Convert Indian Ocean Time to Iran Time

IOT · UTC+6 → IRST · UTC+3:30

IOT is 2 hours 30 minutes ahead of IRST

Chagos · UTC+6

Tuesday, 8 September 2026

Tehran · UTC+3:30

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
ChagosUTC+6 · +06:00
0003060912151821
TehranUTC+3:30 · +03:30
2100030609121518

Shared working hours: 11:30–18:00 in Chagos is 09:00–15:30 in Tehran.

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

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13:06 Tue 8 Sep Chagos = 10:36 Tue 8 Sep Tehran

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Hour-by-hour conversion

Chagos (IOT)Tehran (IRST)
00:0021:30prev. day
01:0022:30prev. day
02:0023:30prev. day
03:0000:30
04:0001:30
05:0002:30
06:0003:30
07:0004:30
08:0005:30
09:0006:30
10:0007:30
11:0008:30
12:0009:30Both at work
13:0010:30Now
14:0011:30Both at work
15:0012:30Both at work
16:0013:30Both at work
17:0014:30Both at work
18:0015:30
19:0016:30
20:0017:30
21:0018:30
22:0019:30
23:0020:30

About this conversion

IOT here means Indian Ocean Time, represented by Chagos (Indian/Chagos), currently UTC+6. IRST means Iran Time, represented by Tehran (Asia/Tehran), currently UTC+3:30.

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 Chagos; day boundaries are marked where the date differs.

Quick answers

  • 09:00 IOT is 06:30 IRST
  • 12:00 IOT is 09:30 IRST
  • 15:00 IOT is 12:30 IRST
  • 18:00 IOT is 15:30 IRST

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