GMT (London) to IST (Kolkata) Converter

Convert between GMT (London) and IST (Kolkata).
02:18:19 AM06:48:19 AM

Time Gap
4h30mahead

Interactive Time Converter

Live updates • DST aware

GMT (London)

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IST (Kolkata)

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Time Analysis

Real-time difference

4h 30m

IST (Kolkata) is 4.5 hours ahead of GMT (London)

Best for

IST (Kolkata) AM

Avoid

GMT (London) PM

From

GMT (London)

CityLondon
CountryUnited Kingdom
UTC OffsetUTC+1
Live Time02:18:19 AM

Currently Night in GMT (London)

To

IST (Kolkata)

CityKolkata
CountryIndia
UTC OffsetUTC+5:30
Live Time06:48:19 AM

Currently Early Morning in IST (Kolkata)

24-Hour Time Comparison

UTC → GMT (London) → IST (Kolkata)

GMT (London) Business Hours

Business Hours: 9:00 AM - 5:00 PM (UTC +01:00)

IST (Kolkata) Business Hours

Business Hours: 9:00 AM - 5:00 PM (UTC +05:30)

Best time to schedule meetings: When both timezones are in business hours (9 AM - 5 PM)

GMT (London) is 4h 30m behind of IST (Kolkata)

UTC
GMT (London)9AM-5PM
IST (Kolkata)9AM-5PM
00:00
Apr 5
01:00
Apr 5
05:30
Apr 5
01:00
Apr 5
02:00
Apr 5
06:30
Apr 5
02:00
Apr 5
03:00
Apr 5
07:30
Apr 5
03:00
Apr 5
04:00
Apr 5
08:30
Apr 5
04:00
Apr 5
05:00
Apr 5
09:30
Apr 5
05:00
Apr 5
06:00
Apr 5
10:30
Apr 5
06:00
Apr 5
07:00
Apr 5
11:30
Apr 5
07:00
Apr 5
08:00
Apr 5
12:30
Apr 5
08:00
Apr 5
09:00
Apr 5
13:30
Apr 5
09:00
Apr 5
10:00
Apr 5
14:30
Apr 5
10:00
Apr 5
11:00
Apr 5
15:30
Apr 5
11:00
Apr 5
12:00
Apr 5
16:30
Apr 5
12:00
Apr 5
13:00
Apr 5
17:30
Apr 5
13:00
Apr 5
14:00
Apr 5
18:30
Apr 5
14:00
Apr 5
15:00
Apr 5
19:30
Apr 5
15:00
Apr 5
16:00
Apr 5
20:30
Apr 5
16:00
Apr 5
17:00
Apr 5
21:30
Apr 5
17:00
Apr 5
18:00
Apr 5
22:30
Apr 5
18:00
Apr 5
19:00
Apr 5
23:30
Apr 5
19:00
Apr 5
20:00
Apr 5
00:30 (next day)
Apr 6
20:00
Apr 5
21:00
Apr 5
01:30 (next day)
Apr 6
21:00
Apr 5
22:00
Apr 5
02:30 (next day)
Apr 6
22:00
Apr 5
23:00
Apr 5
03:30 (next day)
Apr 6
23:00
Apr 5
00:00 (next day)
Apr 6
04:30 (next day)
Apr 6
Current hour in UTC
Overlap Business Hours (Both 9 AM - 5 PM)
GMT (London) only business hour
IST (Kolkata) only business hour
Overlap indicator
GMT (London) indicator
IST (Kolkata) indicator
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Frequently Asked Questions

Everything you need to know about GMT (London) to IST (Kolkata) time conversion

General Questions

IST (Kolkata) is 4 hours and 30 minutes ahead of GMT (London).

This means that right now, when it is 12:00 AM in GMT (London), it is 4:30 AM in IST (Kolkata).

Conversely, when it is 12:00 AM in IST (Kolkata), it is 7:30 PM in GMT (London).

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