Timezones.in — Stay In Sync

Convert Greenwich Mean Time to India Time

GMT · UTC+1 → IST · UTC+5:30

GMT is 4 hours 30 minutes behind IST

London · BST

Tuesday, 8 September 2026

Mumbai · IST

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
LondonBST · +01:00
0003060912151821
MumbaiIST · +05:30
0407101316192201

Shared working hours: 09:00–13:30 in London is 13:30–18:00 in Mumbai.

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

Pick a time and share it

08:05 Tue 8 Sep London = 12:35 Tue 8 Sep Mumbai

Open in planner

Post this

XLinkedInWhatsAppFacebookTelegramEmail

Hour-by-hour conversion

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

About this conversion

GMT here means Greenwich Mean Time, represented by London (Europe/London), currently UTC+1. IST means India Time, represented by Mumbai (Asia/Kolkata), currently UTC+5:30.

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

IST is used by 3 zones, including India. See every meaning of IST.

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 13:30 IST
  • 12:00 GMT is 16:30 IST
  • 15:00 GMT is 19:30 IST
  • 18:00 GMT is 22:30 IST

Related conversions