IST to GMT: India time vs London time

India (IST, UTC+5:30) is 5 hours 30 minutes ahead of London when London is on GMT, and 4 hours 30 minutes ahead of it during daylight saving time (BST).

India and London — UK time (GMT/BST).

UK time is used in London, Birmingham, Leicester, Manchester, the rest of the UK, and Ireland.

When the difference changes

Clocks go back to GMT on 25 October 2026 — the difference becomes 5 hours 30 minutes.
Clocks go forward to BST on 28 March 2027 — the difference becomes 4 hours 30 minutes.
Clocks go back to GMT on 31 October 2027 — the difference becomes 5 hours 30 minutes.

India time to GMT, hour by hour

Each hour of the day in India and in London
India (IST)	London (GMT)	London (BST)
12:00 midnight	6:30 pm (the day before)	7:30 pm (the day before)
1:00 am	7:30 pm (the day before)	8:30 pm (the day before)
2:00 am	8:30 pm (the day before)	9:30 pm (the day before)
3:00 am	9:30 pm (the day before)	10:30 pm (the day before)
4:00 am	10:30 pm (the day before)	11:30 pm (the day before)
5:00 am	11:30 pm (the day before)	12:30 am
6:00 am	12:30 am	1:30 am
7:00 am	1:30 am	2:30 am
8:00 am	2:30 am	3:30 am
9:00 am	3:30 am	4:30 am
10:00 am	4:30 am	5:30 am
11:00 am	5:30 am	6:30 am
12:00 noon	6:30 am	7:30 am
1:00 pm	7:30 am	8:30 am
2:00 pm	8:30 am	9:30 am
3:00 pm	9:30 am	10:30 am
4:00 pm	10:30 am	11:30 am
5:00 pm	11:30 am	12:30 pm
6:00 pm	12:30 pm	1:30 pm
7:00 pm	1:30 pm	2:30 pm
8:00 pm	2:30 pm	3:30 pm
9:00 pm	3:30 pm	4:30 pm
10:00 pm	4:30 pm	5:30 pm
11:00 pm	5:30 pm	6:30 pm

Quick conversions

GMT: 9:00 am IST = 3:30 am · 12:00 noon IST = 6:30 am · 6:00 pm IST = 12:30 pm · 9:00 pm IST = 3:30 pm
BST: 9:00 am IST = 4:30 am · 12:00 noon IST = 7:30 am · 6:00 pm IST = 1:30 pm · 9:00 pm IST = 4:30 pm
GMT: 9:00 am GMT = 2:30 pm in India · 6:00 pm GMT = 11:30 pm in India · 9:00 pm GMT = 2:30 am (the next day) in India
BST: 9:00 am BST = 1:30 pm in India · 6:00 pm BST = 10:30 pm in India · 9:00 pm BST = 1:30 am (the next day) in India

Best time to call your parents in India from London

Hours when an older parent is usually up (7:00 am–9:30 pm in India) and you are not at work (before 8:30 am or after 6:00 pm on weekdays):

GMT, weekdays: 12:30 pm–2:00 pm in India = 7:00 am–8:30 am in London.
GMT, weekends: 1:30 pm–9:30 pm in India = 8:00 am–4:00 pm in London.
BST, weekdays: 11:30 am–1:00 pm in India = 7:00 am–8:30 am in London.
BST, weekends: 12:30 pm–9:30 pm in India = 8:00 am–5:00 pm in London.

Put it in your calendar as a repeating call. Plan it for your own hours with the call-time planner →

Knowing they are fine when you cannot call

With Athnova Care, your parent gets one WhatsApp message a day in their language. A check-in at 9:00 am in India reaches you at 3:30 am GMT or 4:30 am BST — so on most days you know they have taken their medicines before your day starts or ends. If they do not reply, they get a reminder and then a phone call, and you are alerted. Caring for parents in India from London →

Questions families ask

What is the time difference between India and London?

India (IST, UTC+5:30) is 5 hours 30 minutes ahead of London when London is on GMT, and 4 hours 30 minutes ahead of it during daylight saving time (BST).

Is IST ahead of GMT?

Yes. IST is 5 hours 30 minutes ahead of London when London is on GMT, and 4 hours 30 minutes ahead of it during daylight saving time (BST).

What time is it in India when it is 9 am in London?

2:30 pm on GMT, and 1:30 pm on BST.

Does India have daylight saving time?

No. India keeps IST, UTC+5:30, all year, so the difference with London changes only when London changes its clocks.

What is the best time to call my parents in India from London?

On weekdays, 12:30 pm–2:00 pm in India = 7:00 am–8:30 am in London (on GMT; on BST it is 11:30 am–1:00 pm in India = 7:00 am–8:30 am in London). Most older parents are easiest to reach after breakfast and before their evening TV.