Live · calculated from the IANA time-zone database

Time difference between London and Mumbai

Short answer

Mumbai is 4 hours and 30 minutes ahead of London. Right now it is 13:34 in London (GMT+1, UTC+1) and 18:04 in Mumbai (GMT+5:30, UTC+5:30).

Right now

London · United Kingdom

13:34

Tuesday, September 15, 2026

British Summer Time · GMT+1 · UTC+1

Mumbai · India

18:04

Tuesday, September 15, 2026

India Standard Time · GMT+5:30 · UTC+5:30

Times at the moment this page was generated. Reload for a fresh reading.

Does the difference between London and Mumbai change during the year?

Yes. For 210 days of 2026 the difference is 4 hours and 30 minutes, but it moves whenever London or Mumbai enters or leaves daylight saving time. Here is the full 2026 calendar (dates in UTC):

From	Until	Mumbai vs London
January 1	March 29	+5:30 h
March 29	October 25	+4:30 h
October 25	December 31	+5:30 h

The highlighted row is the current period. Every date comes from each zone's official rules, not from a hand-typed table.

Best time to call Mumbai from London (and vice versa)

The window in which both cities are inside their 9:00–17:00 working day runs from 09:00 to 12:30 in London, which is 13:30 to 17:00 in Mumbai: 3.5 hours of overlap per day. For a call that disturbs nobody, aim for the middle of that window.

Outside that window, the practical rule: mornings in Mumbai are afternoons in London. Avoid any hour that falls before 8:00 or after 21:00 in either city.

London to Mumbai conversion table

Each London hour and its equivalent in Mumbai today. Rows shaded green are working hours (9:00–17:00) in both cities at once.

London time · Tue, Sep 15	Mumbai time
00:00	04:30
01:00	05:30
02:00	06:30
03:00	07:30
04:00	08:30
05:00	09:30
06:00	10:30
07:00	11:30
08:00	12:30
09:00	13:30
10:00	14:30
11:00	15:30
12:00	16:30
13:00	17:30
14:00	18:30
15:00	19:30
16:00	20:30
17:00	21:30
18:00	22:30
19:00	23:30
20:00	00:30next day
21:00	01:30next day
22:00	02:30next day
23:00	03:30next day

Looking for it the other way round? This page covers both directions: Mumbai to London is the same difference with the sign flipped.

The two time zones

London — Europe/London

London sits on the Greenwich meridian: GMT (UTC+0) in winter and British Summer Time (UTC+1) from the last Sunday of March to the last Sunday of October.

Mumbai — Asia/Kolkata

Mumbai, like all of India, uses India Standard Time (IST), a fixed UTC+5:30. The half-hour offset and the absence of daylight saving make Indian conversions the most error-prone in remote teams.

Frequently asked questions

How many hours difference between London and Mumbai?

Mumbai is 4 hours and 30 minutes ahead of London. For most of the year (210 days) the difference is 4 hours and 30 minutes; it shifts during the weeks when one of the two cities enters or leaves daylight saving time.

When it is 12:00 noon in London, what time is it in Mumbai?

16:30 in Mumbai (at today's difference of 4 hours and 30 minutes).

What is the best time for a meeting between London and Mumbai?

Between 09:00 and 12:30 in London, which is 13:30–17:00 in Mumbai: 3.5 hours of overlap inside both cities' 9:00–17:00 working day.

Do London and Mumbai observe daylight saving time?

London: yes. Mumbai: no. Because only one of them changes its clocks, the difference moves by one hour twice a year.

What time zone is London in? And Mumbai?

London: British Summer Time (Europe/London, UTC+1). Mumbai: India Standard Time (Asia/Kolkata, UTC+5:30).

Tools

Meeting grid — add both cities and click a slot

Time zone converter — any city, any time

Working hours overlap calculator

Daylight saving time 2027 — all dates