Kolkata to Singapore Time

Live IST ↔ SGT time converter · West Bengal, India → Singapore

Kolkata IST (Indian Standard Time) · UTC+05:30
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West Bengal, India
2.5h ahead of IST
UTC+8
Singapore SGT (Singapore Time) · UTC+8
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Singapore

24-Hour Overlap Timeline

✅ Overlap: 9:00 AM–3:00 PM in Kolkata · 12:00 PM–6:00 PM in Singapore (6h window)
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UTC →
🇮🇳 Kolkata UTC+5:30 5a 6a 7a 8a 9a 10a 11a 12p 1p 2p 3p 4p 5p 6p 7p 8p 9p 10p 11p 12a 1a 2a 3a 4a
🇸🇬 Singapore UTC+8 8a 9a 10a 11a 12p 1p 2p 3p 4p 5p 6p 7p 8p 9p 10p 11p 12a 1a 2a 3a 4a 5a 6a 7a
Both working Working Off hours Sleeping Now

IST (Indian Standard Time) to Singapore (SGT (Singapore Time)) Conversion Table

All 24 hours of the day · based on SGT (Singapore Time).
✅ Both in business hours 🔵 India office hours only 🟢 Singapore office hours only

IST (Indian Standard Time) — Kolkata Singapore — SGT Working hours
12:00 AM IST (Indian Standard Time) 2:30 AM SGT
1:00 AM IST (Indian Standard Time) 3:30 AM SGT
2:00 AM IST (Indian Standard Time) 4:30 AM SGT
3:00 AM IST (Indian Standard Time) 5:30 AM SGT
4:00 AM IST (Indian Standard Time) 6:30 AM SGT
5:00 AM IST (Indian Standard Time) 7:30 AM SGT
6:00 AM IST (Indian Standard Time) 8:30 AM SGT
7:00 AM IST (Indian Standard Time) 9:30 AM SGT 🟢 SGT only
8:00 AM IST (Indian Standard Time) 10:30 AM SGT 🟢 SGT only
9:00 AM IST (Indian Standard Time) 11:30 AM SGT ✅ overlap
10:00 AM IST (Indian Standard Time) 12:30 PM SGT ✅ overlap
11:00 AM IST (Indian Standard Time) 1:30 PM SGT ✅ overlap
12:00 PM IST (Indian Standard Time) 2:30 PM SGT ✅ overlap
1:00 PM IST (Indian Standard Time) 3:30 PM SGT ✅ overlap
2:00 PM IST (Indian Standard Time) 4:30 PM SGT ✅ overlap
3:00 PM IST (Indian Standard Time) 5:30 PM SGT 🔵 India only
4:00 PM IST (Indian Standard Time) 6:30 PM SGT 🔵 India only
5:00 PM IST (Indian Standard Time) 7:30 PM SGT 🔵 India only
6:00 PM IST (Indian Standard Time) 8:30 PM SGT
7:00 PM IST (Indian Standard Time) 9:30 PM SGT
8:00 PM IST (Indian Standard Time) 10:30 PM SGT
9:00 PM IST (Indian Standard Time) 11:30 PM SGT
10:00 PM IST (Indian Standard Time) 12:30 AM SGT +1 day
11:00 PM IST (Indian Standard Time) 1:30 AM SGT +1 day
🇮🇳 Travel Guide

Explore Kolkata — Top Attractions & Travel Guide

Discover top attractions, local tips and hidden gems in Kolkata on india-guide.in — India's curated travel destination guide.

Explore Kolkata on india-guide.in →

Best Time to Call Singapore from Kolkata

Business Hours Overlap 9:00 AM – 2:30 PM IST

Both Kolkata and Singapore are in standard business hours simultaneously during this window. Schedule meetings, investor calls, or client demos in this slot for maximum availability.

Morning India call
9:00 AM IST
11:30 AM SGT
Midday call
12:00 PM IST
2:30 PM SGT
End of India day
6:00 PM IST
8:30 PM SGT
🇮🇳

Kolkata, India

Time zone: IST (UTC+05:30) — fixed, no DST
State: West Bengal

Kolkata is eastern India's commercial and cultural hub, and serves as the gateway to north-east India and Bangladesh. The city's jute, tea, and coal trade built British India. Today it houses the Calcutta Stock Exchange and is a growing IT destination. Kolkata's intellectual and literary tradition makes it India's cultural capital. It is the closest major Indian city to South-East Asia, with strong historic trade ties.

  • Gateway to North-East India and Bangladesh
  • Calcutta Stock Exchange — India's second oldest
  • India's dominant jute, tea, and coal trading centre historically
  • Closest major India city to South-East Asian markets
🇮🇳 Explore Kolkata attractions on india-guide.in →
🇸🇬

Singapore, Singapore

Time zone: SGT (UTC+8, no DST)
Region: South-East Asia

Singapore is South-East Asia's financial powerhouse and the regional HQ for hundreds of Indian multinationals. It is home to the regional offices of Infosys, TCS, Wipro, HDFC Bank, and ICICI. Singapore's Indian Tamil community (about 9% of the population) has roots going back 200 years. The city-state is consistently ranked among the top 3 easiest places to do business globally.

  • No DST — stable 2.5h ahead of IST
  • Regional HQ for Indian IT giants
  • 9% Tamil-origin population
  • Top-ranked business environment globally
India connections: Over 350,000 Indian nationals. 9% Tamil-origin population. Regional HQ for all major Indian IT firms. Direct flights from Mumbai, Delhi, Bangalore, Chennai, Hyderabad. Singapore Exchange (SGX) lists Indian ETFs.

Frequently Asked Questions

What is the time difference between Kolkata and Singapore?
Singapore is always 2.5h ahead of IST year-round. Singapore does not observe daylight saving time.
What is 9 AM IST in Singapore?
9:00 AM IST (Kolkata) = 11:30 AM SGT in Singapore.
What is the best time to schedule a meeting between Kolkata and Singapore?
The optimal meeting window is 9:00 AM–2:30 PM IST when both Kolkata and Singapore offices are open. Book in this window to avoid after-hours calls.
Does India observe daylight saving time (DST)?
No. India (IST, UTC+5:30) does not observe daylight saving time and has not done so since 1945. Indian Standard Time is fixed year-round. This means that when Singapore also does not change, so the Kolkata–Singapore offset is perfectly stable all year.
Why is India on a half-hour timezone (UTC+5:30)?
India's UTC+5:30 offset was established in 1905 as a compromise between the time zones of Bombay (UTC+4:52) and Calcutta (UTC+5:54) when India unified under British rule. Several countries use half-hour or quarter-hour offsets — including Nepal (UTC+5:45), Iran (UTC+3:30), and parts of Australia (UTC+9:30) — to better align solar noon with clock noon across their territory.