Calcutta to London time converter

London is 1 hour behind Calcutta. When it is 9:00 AM in Calcutta, it is 8:00 AM in London.

Calcutta SAST

Monday, October 19, 2026

London BST

Monday, October 19, 2026

Calcutta
South Africa
Mon, Oct 19
SASTUTC+2
London
United Kingdom
Mon, Oct 19
BSTUTC+1-1h
Finding your time zone…
Shared working hours (9:00–18:00)

Calcutta to London conversion table

Every hour of today in Calcutta and the matching time in London. Light rows are typical working hours (9:00–18:00).

CalcuttaLondon
12:00 AM11:00 PM−1 day
1:00 AM12:00 AM
2:00 AM1:00 AM
3:00 AM2:00 AM
4:00 AM3:00 AM
5:00 AM4:00 AM
6:00 AM5:00 AM
7:00 AM6:00 AM
8:00 AM7:00 AM
9:00 AM8:00 AM
10:00 AM9:00 AM
11:00 AM10:00 AM
12:00 PM11:00 AM
1:00 PM12:00 PM
2:00 PM1:00 PM
3:00 PM2:00 PM
4:00 PM3:00 PM
5:00 PM4:00 PM
6:00 PM5:00 PM
7:00 PM6:00 PM
8:00 PM7:00 PM
9:00 PM8:00 PM
10:00 PM9:00 PM
11:00 PM10:00 PM

Best time to call or meet

Both sides are at work from 10:00 AM – 6:00 PM in Calcutta (9:00 AM – 5:00 PM in London).

Daylight saving time and the difference

The difference changes during the year because Calcutta and London switch clocks on different dates:

  • Oct 19, 2026 – Oct 25, 2026: -1h
  • Oct 25, 2026 – Mar 28, 2027: -2h
  • Mar 28, 2027 – Oct 19, 2027: -1h

Distance

Calcutta and London are 9,041 km (5,618 miles) apart in a straight line.

More conversions

London to CalcuttaCalcutta to New YorkCalcutta to Los AngelesCalcutta to ChicagoCalcutta to TorontoCalcutta to São PauloCalcutta to ParisCalcutta to BerlinCalcutta to MoscowCalcutta to DubaiCalcutta to New DelhiCalcutta to BangkokCalcutta to Singapore
New York to LondonLos Angeles to LondonChicago to LondonToronto to LondonSão Paulo to LondonParis to LondonBerlin to LondonMoscow to LondonDubai to LondonNew Delhi to LondonBangkok to LondonSingapore to London

Questions and answers

What is the time difference between Calcutta and London?

London is 1 hour behind Calcutta.

What time is it in London when it is 9 AM in Calcutta?

When it is 9:00 AM in Calcutta, it is 8:00 AM in London.

When is the best time to call London from Calcutta?

Both sides are at work from 10:00 AM – 6:00 PM in Calcutta (9:00 AM – 5:00 PM in London).

Does the time difference between Calcutta and London change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.