World Timezones

IST to London Converter

Compare London to IST instead

Search above to add a time zone or city

Offset

4.5 hours

India Standard Time (IST) is currently ahead of London (GMT+1).

IST: UTC+5:30

GMT+1: UTC+1

London is currently observing daylight saving time; India Standard Time is not.

When to schedule

Business-hours overlap: 2 PM–6 PM in India Standard Time (9 AM–1 PM in London).

Both teams are in working hours during this window on weekdays.

Suggested time: 4:00 PM India Standard Time (11:30 AM London).

This window may shift by an hour during daylight saving time.

About these zones

India Standard Time is also known as IST.

London uses Greenwich Mean Time (GMT, or BST).

India Standard Time and London are approximately 4,450 miles apart.

Quick reference

Full 24-hour conversion table.

ISTLondonDay
12:00 am7:30 pm-1 day
1:00 am8:30 pm-1 day
2:00 am9:30 pm-1 day
3:00 am10:30 pm-1 day
4:00 am11:30 pm-1 day
5:00 am12:30 amSame day
6:00 am1:30 amSame day
7:00 am2:30 amSame day
8:00 am3:30 amSame day
9:00 am4:30 amSame day
10:00 am5:30 amSame day
11:00 am6:30 amSame day
12:00 pm7:30 amSame day
1:00 pm8:30 amSame day
2:00 pm9:30 amSame day
3:00 pm10:30 amSame day
4:00 pm11:30 amSame day
5:00 pm12:30 pmSame day
6:00 pm1:30 pmSame day
7:00 pm2:30 pmSame day
8:00 pm3:30 pmSame day
9:00 pm4:30 pmSame day
10:00 pm5:30 pmSame day
11:00 pm6:30 pmSame day

Daylight saving time

London observes daylight saving time; India Standard Time does not. The offset between the two zones changes when London transitions: on Sunday, October 25, 2026, clocks fall back from GMT+1 to GMT.

Daylight today

India Standard Time
Sunrise
6:02 AM
Sunset
7:11 PM
Day length
13h 9m
London
Sunrise
4:55 AM
Sunset
9:02 PM
Day length
16h 8m

Daylight overlap: 9h 47m — 9:25 AM–7:11 PM in India Standard Time (4:55 AM–2:41 PM in London). Both locations are in daylight during this window.

Cities in these zones

Airports in these zones

Airports in India Standard Time

  • BOM
  • NMI
  • DEL
  • BLR
  • HYD
  • AMD
  • MAA
  • CCU
  • STV
  • PNQ

Airports in Greenwich Mean Time

  • LCY
  • LGW
  • LHR
  • LTN
  • STN
  • BHX
  • EMA
  • GLA
  • PIK
  • LBA

Related conversions