IST to LONDON Time Converter

India Standard Time → LONDON (London)

IST = UTC+5:30LONDON = UTC+1

⚠️ IST is ambiguous — on this page it means India Standard Time. It also refers to:

Ireland Standard Time (Dublin) → LONDON ↗Israel Standard Time (Jerusalem) → LONDON ↗

ClockinSync

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IST (Mumbai)BASE

09:00

00:0006:0012:0018:0024:00

London

United Kingdom · -4.5h🔔 Public Holiday in 6d —  Early May Bank Holiday

04:30

New York

USA · -9.5h

-1 day23:30

Tokyo

Japan · +3.5h

12:30

Dubai

United Arab Emirates · -1.5h

07:30

Sydney

Australia · +4.5h

13:30

IST (Mumbai) ↔ London — time offset

IST (Mumbai) is 4 hours 30 minutes ahead of London. 12:00 PM in IST (Mumbai) = 07:00 in London.

IANA timezones: Asia/Kolkata for IST (Mumbai), Europe/London for London. Current offset: 4.5 hours 30 minutes.

Daily overlap window

Standard 9–5 schedules overlap for 3.5 hours between IST (Mumbai) and London each day.

00:0006:0012:0018:0024:00

IST (Mumbai)

London

Overlap (3.5h)

Top scheduling windows

Both IST (Mumbai) and London are in standard hours simultaneously for 3.5h per day. 3 recommended slots shown below.

14:00 Mumbai / 09:00 London✓ Both working

15:00 Mumbai / 10:00 London✓ Both working

16:00 Mumbai / 11:00 London✓ Both working

Working hours defined as 09:00–17:00 local time for each location.

Upcoming public holidays

IST (Mumbai)

No upcoming public holidays this year.

London9 holidays

May 4Early May Bank HolidaySOON

May 25Spring Bank Holiday

Jun 15World Cup Bank Holiday

Jul 13Battle of the Boyne

Aug 3Summer Bank Holiday

Working across IST (Mumbai) and London

The 4.5-hour gap between IST (Mumbai) (India) and London (United Kingdom) requires some planning — but a 3.5-hour daily overlap means both teams can connect in real time without unusual scheduling.

💡 Scheduling tips for these locations

✅

IST (Mumbai) at 14:00–15:00 lines up with 09:00–10:00 in London. This window works for both locations without anyone going off-hours.

✅

IST (Mumbai) at 15:00–16:00 lines up with 10:00–11:00 in London. This window works for both locations without anyone going off-hours.

✅

IST (Mumbai) at 16:00–17:00 lines up with 11:00–12:00 in London. This window works for both locations without anyone going off-hours.

Watch out for daylight saving — it can change the time difference without warning.

For any IST (Mumbai) time, drag the slider or type it into the bar above. Formats like "3pm", "15:30", or "9am" all work for instant conversion.

IST (Mumbai) ↔ LONDON (London)

3h of business hours overlap daily (09:00–17:00)

IST (Mumbai)

LONDON (London)