IST (Colombo) to IST (Kolkata) Time Zone Converter — Time Difference Between Colombo and Kolkata
Drag the slider or click the time display to type a specific hour and instantly convert IST (Colombo) to IST (Kolkata). The time difference between Colombo and Kolkata is zero — both share the same UTC offset (UTC+5:30), so no conversion is needed. Use this IST (Colombo) to IST (Kolkata) time zone converter to check the live current time in both cities, browse the 24-hour IST (Colombo) to IST (Kolkata) conversion table, plan international meetings, find the best overlap hours, and account for daylight saving time changes automatically.
IST (Colombo)
India Standard Time
---
IST (Kolkata)
India Standard Time
---
IST (Colombo) to IST (Kolkata) Time Zone Difference — Hour-by-Hour Conversion Table
Scan each row to convert any IST (Colombo) time to IST (Kolkata) and find the exact time difference between Colombo and Kolkata hour by hour. Amber-highlighted rows mark standard daytime business hours, making it easy to spot overlapping work windows for scheduling international meetings or remote team calls. Tap the arrows to jump between days, click "Today" to reset, and all daylight saving time transitions are handled automatically.
| IST (Colombo) | IST (Kolkata) |
|---|
What Time Is It Now in Colombo?
Live current local time in Colombo, Sri Lanka — IST (UTC+5:30). Updates every second.
What Time Is It Now in Kolkata?
Live current local time in Kolkata, India — IST (UTC+5:30). Updates every second.
IST (Colombo) & IST (Kolkata) Meeting Planner — Best Overlapping Hours
Use the color-coded conversion table above to find overlapping business hours between Colombo and Kolkata. Amber rows mark standard daytime work hours (8 AM–6 PM local time) — pick a slot that falls in amber on both sides for a meeting time that works for everyone. Since IST (Colombo) (UTC+5:30) is 0 hours the same as IST (Kolkata) (UTC+5:30), this time zone meeting planner is ideal for scheduling international calls, remote team standups, and cross-border project syncs.
Why Trust This Colombo to Kolkata Time Zone Converter?
ConvertFlash uses the IANA Time Zone Database — the same authoritative source that powers your phone, browser, and every major operating system — so every Colombo to Kolkata conversion handles daylight saving time transitions, half-hour UTC offsets, and historical time zone changes automatically. The live world clock updates every second, and the hour-by-hour conversion table regenerates correctly for any past or future date you select, making it reliable for both real-time checks and advance international scheduling.
IST — India Standard Time
Colombo, Sri Lanka — UTC offset UTC+5:30
- Abbreviation
- IST
- UTC Offset
- UTC+5:30
- City
- Colombo
- Country
- Sri Lanka
IST — India Standard Time
Kolkata, India — UTC offset UTC+5:30
- Abbreviation
- IST
- UTC Offset
- UTC+5:30
- City
- Kolkata
- Country
- India