GMT (London) to IST (Kolkata) Time Converter

Convert time between GMT (London) and IST (Kolkata)

Live updates
11:08 PM→03:38 AM
IST (Kolkata) is 4h 30m ahead of GMT (London)

From

GMT (London)

City:
London
Country:
United Kingdom
UTC Offset:
UTC+1
Local Time:
11:08 PMNight

To

IST (Kolkata)

City:
Kolkata
Country:
India
UTC Offset:
UTC+5:30
Local Time:
03:38 AMNight

Time Analysis

Smart Insights

Best time to call

IST (Kolkata) morning

GMT (London) is sleeping

Working hours overlap

5 hours

9 AM - 5 PM window

24-Hour Comparison

Quick reference for the full day

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
00:00Aug 23
01:00Aug 23
05:30Aug 23
01:00Aug 23
02:00Aug 23
06:30Aug 23
02:00Aug 23
03:00Aug 23
07:30Aug 23
03:00Aug 23
04:00Aug 23
08:30Aug 23
04:00Aug 23
05:00Aug 23
09:30Aug 23
05:00Aug 23
06:00Aug 23
10:30Aug 23
06:00Aug 23
07:00Aug 23
11:30Aug 23
07:00Aug 23
08:00Aug 23
12:30Aug 23
08:00Aug 23
09:00Aug 23
13:30Aug 23
09:00Aug 23
10:00Aug 23
14:30Aug 23
10:00Aug 23
11:00Aug 23
15:30Aug 23
11:00Aug 23
12:00Aug 23
16:30Aug 23
12:00Aug 23
13:00Aug 23
17:30Aug 23
13:00Aug 23
14:00Aug 23
18:30Aug 23
14:00Aug 23
15:00Aug 23
19:30Aug 23
15:00Aug 23
16:00Aug 23
20:30Aug 23
16:00Aug 23
17:00Aug 23
21:30Aug 23
17:00Aug 23
18:00Aug 23
22:30Aug 23
18:00Aug 23
19:00Aug 23
23:30Aug 23
19:00Aug 23
20:00Aug 23
00:30 (next day)Aug 24
20:00Aug 23
21:00Aug 23
01:30 (next day)Aug 24
21:00Aug 23
22:00Aug 23
02:30 (next day)Aug 24
22:00NowAug 23
23:00Aug 23
03:30 (next day)Aug 24
23:00Aug 23
00:00 (next day)Aug 24
04:30 (next day)Aug 24
Current UTC hour
Overlap (Both 9AM-5PM)
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IST (Kolkata) only
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Frequently Asked Questions

About GMT (London) to IST (Kolkata) time conversion

General Questions

IST (Kolkata)is4 hours and 30 minutesahead ofGMT (London)

GMT (London)

12:00 AM

IST (Kolkata)

4:30 AM

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

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