London to Mumbai Time

London to Mumbai conversion chart

Every full hour of Wednesday, October 14, 2026 in London, and the time in Mumbai. Pick another date in the converter and the chart follows.

Daylight saving time in London and Mumbai

• London: UK time, GMT (UTC+0) in winter and BST (UTC+1) in summer. Clocks go forward at 1:00 AM on the last Sunday in March and back at 2:00 AM on the last Sunday in October, the dates the UK government publishes.
• Mumbai: India Standard Time, IST (UTC+5:30), with no clock changes: India does not use daylight saving time.

Mumbai keeps IST, UTC+5:30, in every season, so the gap moves only when London switches: March 29 and October 25, 2026, and March 28 and October 31, 2027. From March 29, 2026, when London moves its clocks, Mumbai is 4 hours 30 minutes ahead of London; London's change on October 25 returns the gap to 5 hours 30 minutes.

Mumbai stands still and London moves twice a year, so the gap follows London. With BST in force, Mumbai is 4 hours 30 minutes ahead of London. With GMT in force, Mumbai is 5 hours 30 minutes ahead of London. The highlighted rows are the 303 days on GMT:

London to Mumbai hour by hour

London from 6 AM to 11 PM on the left, Mumbai on the right, one column for each of the 2 gaps. The 3 shaded hours fall inside a 9-to-5 day in London and in Mumbai with a gap of 4 hours 30 minutes.

Office hours and the best time to meet

With a 9:00 AM to 5:00 PM workday on both sides, for each gap of the year:

• 4 hours 30 minutes apart (BST with IST), 210 days of 2026: 3 hours 30 minutes of shared office time: 9:00 AM to 12:30 PM in London is 1:30 PM to 5:00 PM in Mumbai. A one-hour call fits if it starts by 11:30 AM London time (4:00 PM for Mumbai).
• 5 hours 30 minutes apart (GMT with IST), 155 days of 2026: 2 hours 30 minutes of shared office time: 9:00 AM to 11:30 AM in London is 2:30 PM to 5:00 PM in Mumbai. Starting at 10:30 AM in London, which is 4:00 PM in Mumbai, is the last chance for a full hour.

The workweek in London and Mumbai

For a Monday to Friday week with 9-to-5 office hours in both cities:

London is still at 4:30 AM on Monday when Mumbai opens on Monday at 9:00 AM, and Mumbai has reached Friday 9:30 PM by the time London closes on Friday at 5:00 PM. That leaves 17 hours 30 minutes of shared office time per week with the usual gap of 4 hours 30 minutes, spread over all 5 weekdays.

Mumbai reaches each new date 4 hours 30 minutes before London: at 7:30 PM in London, it is already midnight in Mumbai.

A rule of thumb: add 4 hours 30 minutes to go from London to Mumbai, or 5 hours 30 minutes in the weeks with the other gap. 8:00 PM in London is 12:30 AM the next day in Mumbai.

London and Mumbai against UTC

Against UTC in 2026: London at UTC+0 in January and UTC+1 in July, Mumbai at UTC+5:30 in both January and July.

In the IANA time zone database, London is Europe/London and Mumbai is Asia/Kolkata; your browser converts with that data.

Comparing more than two places? Add as many cities as you need in the time zone converter, or find a slot that works for everyone with the meeting planner. For timestamps from logs or APIs, the Unix timestamp converter turns them into readable dates.

Sources

The clock change rules above come from these pages. The dates, the gap table, the hour table and the office hours are computed from them and checked against the time zone data at build time.

• GOV.UK: When do the clocks change?
• timeanddate.com: time zones in India
• IANA: Time Zone Database

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Built by Tobias Kurth, designer. Updated October 14, 2026.

Frequently asked questions