London to Mumbai (India) — Time Zone Converter
GMT/BST (UTC+1) → IST (UTC+5:30). Mumbai (India) is 4.5 hours ahead relative to London right now.
London
Oct 7, 2026, 12:55 PM
Mumbai (India)
Oct 7, 2026, 5:25 PM
Need the reverse? Mumbai (India) to London →
Sample times — GMT/BST to IST
Sample conversions for today; daylight saving applied.
About London and Mumbai (India)London vs Mumbai (India) time difference through 2026
The gap changes twice during 2026, because only London observes daylight saving time. Double-check meetings booked in the weeks around each switch.
Dates (2026) GMT/BST IST Difference Jan 1 – Mar 28 UTC UTC+5:30 Mumbai (India) is 5.5 hours ahead Mar 29 – Oct 24 UTC+1 UTC+5:30 Mumbai (India) is 4.5 hours ahead Oct 25 – Dec 31 UTC UTC+5:30 Mumbai (India) is 5.5 hours ahead
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
London vs Mumbai (India) time difference through 2026
The gap changes twice during 2026, because only London observes daylight saving time. Double-check meetings booked in the weeks around each switch.
| Dates (2026) | GMT/BST | IST | Difference |
|---|---|---|---|
| Jan 1 – Mar 28 | UTC | UTC+5:30 | Mumbai (India) is 5.5 hours ahead |
| Mar 29 – Oct 24 | UTC+1 | UTC+5:30 | Mumbai (India) is 4.5 hours ahead |
| Oct 25 – Dec 31 | UTC | UTC+5:30 | Mumbai (India) is 5.5 hours ahead |
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
London to Mumbai is five and a half hours in winter and four and a half in summer, thanks to India Standard Time’s half-hour offset. The gap is small enough that UK and Indian working days overlap through the afternoon.
Frequently asked questions
What is the time difference between London and Mumbai (India)?
Right now the offset is about 4.5 hours ahead (from GMT/BST to IST). Daylight saving rules differ by region, so use the converter and table above rather than memorising a single number year-round.
Does daylight saving affect London vs Mumbai (India)?
Yes, whenever either region springs forward or falls back, the gap can shift by an hour. This page uses the IANA time-zone database so those transitions are applied automatically.
How do I schedule a meeting across the United Kingdom and India?
Pick a time in the converter, share both columns with attendees, and avoid early-morning or late-night slots on one side. The sample table lists common business hours in the source zone.
Why is the London to Mumbai difference not a whole number?
India uses a single nationwide time zone set at UTC+5:30, a half-hour offset. So London is 5.5 hours behind Mumbai in winter and 4.5 hours behind during British Summer Time.
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