Lisbon to Kolkata (Calcutta): time difference
Kolkata (Calcutta) is 4 h 30 min ahead of Lisbon. Live clocks for both, the working hours they share, and how each one sits against your own time.
🇮🇳 Kolkata (Calcutta), India
47
- India Standard Time
- UTC+5:30
- Daytime
☀️ 05:32 · 🌙 17:17 · 11 h 46 min
+4 h 30 min
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Lisbon 06:01 6:01 AM Kolkata (Calcutta) 10:31 10:31 AM You –:–
06:01 6:01 AM
Western European Summer Time · UTC+1
☀️ 07:41 · 🌙 19:07
10:31 10:31 AM
India Standard Time · UTC+5:30
☀️ 05:32 · 🌙 17:17
·
+4 h 30 min
Kolkata (Calcutta) is 4 h 30 min ahead of Lisbon.
When you, Lisbon and Kolkata (Calcutta) are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Lisbon
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇮🇳 Kolkata (Calcutta)
4:30 4:30 AM 5:30 5:30 AM 6:30 6:30 AM 7:30 7:30 AM 8:30 8:30 AM 9:30 9:30 AM 10:30 10:30 AM 11:30 11:30 AM 12:30 12:30 PM 13:30 1:30 PM 14:30 2:30 PM 15:30 3:30 PM 16:30 4:30 PM 17:30 5:30 PM 18:30 6:30 PM 19:30 7:30 PM 20:30 8:30 PM 21:30 9:30 PM 22:30 10:30 PM 23:30 11:30 PM 0:30 12:30 AM 1:30 1:30 AM 2:30 2:30 AM 3:30 3:30 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇵🇹 Lisbon | 🇮🇳 Kolkata (Calcutta) |
|---|---|---|
| Local time | 06:01 | 10:31 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Western European Summer Time | India Standard Time |
| UTC offset | UTC+1 | UTC+5:30 |
| Offset from Lisbon | — | +4 h 30 min |
| IANA zone | Europe/Lisbon | Asia/Kolkata |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:41 | 05:32 |
| Sunset | 19:07 | 17:17 |
| Daylight | 11 h 26 min | 11 h 46 min |
| People on this clock | 545,923 | 4,486,679 |
Compare Lisbon with another city
More comparisons with Lisbon: the time zones next to it and the far side of the clock.
Big time differences
Lisbon and Kolkata (Calcutta): common questions
What is the time difference between Lisbon and Kolkata (Calcutta)?
Kolkata is 4 hours and 30 minutes ahead: it uses UTC+5:30, while Lisbon is on UTC+1.
If it is 9:00 AM in Lisbon, what time is it in Kolkata (Calcutta)?
At 9:00 AM in Lisbon, clocks in Kolkata show 1:30 PM.
What time is it in Kolkata (Calcutta) when it is 6:00 PM in Lisbon?
When it is 6:00 PM in Lisbon, it is 10:30 PM in Kolkata.
When is a good time to call Kolkata (Calcutta) from Lisbon?
Between 9:00 AM and 1:30 PM in Lisbon – that is 1:30 PM to 6:00 PM in Kolkata – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Kolkata (Calcutta)?
From 7:30 PM in Lisbon it is already the next day in Kolkata. The other way round, until 4:30 AM in Kolkata it is still the previous day in Lisbon.
Is the time difference between Lisbon and Kolkata (Calcutta) the same all year?
No. Only Lisbon switches to summer time, so the gap changes twice a year. From October 25, 2026, Kolkata will be 5 hours and 30 minutes ahead of Lisbon.
