IST to WEST: IST is 4 hours 30 minutes ahead of WEST
India Standard Time is 4 hours 30 minutes ahead of Western European Time right now. It is 9:16 am IST in India and 4:46 am WEST in Lisbon.
Convert a specific time from IST to WEST
Pick any time and date to convert it both ways. The conversion runs in your browser against the real zone rules, so a date inside a daylight saving period gets that period's offset rather than today's.
What is the time difference between IST and WEST?
Western European Time is 4 hours 30 minutes behind India Standard Time. To go from IST to WEST you subtract 4 hours 30 minutes. That gap is not fixed. Across 2026 the distance between these two zones takes 2 different values, from 4 hours 30 minutes to 5 hours 30 minutes, because Lisbon moves its clocks and India does not. This page recomputes it rather than assuming.
IST to WEST conversion table
Every hour of Sunday, September 27, 2026 in India, with the matching reading in Lisbon. 5 of the 24 hours land on a different calendar date in Lisbon, which is the part people get wrong when they schedule across this pair.
| IST | IST 24h | WEST | WEST 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 7:30 pm | 19:30 | the previous day |
| 1:00 am | 01:00 | 8:30 pm | 20:30 | the previous day |
| 2:00 am | 02:00 | 9:30 pm | 21:30 | the previous day |
| 3:00 am | 03:00 | 10:30 pm | 22:30 | the previous day |
| 4:00 am | 04:00 | 11:30 pm | 23:30 | the previous day |
| 5:00 am | 05:00 | 12:30 am | 00:30 | same day |
| 6:00 am | 06:00 | 1:30 am | 01:30 | same day |
| 7:00 am | 07:00 | 2:30 am | 02:30 | same day |
| 8:00 am | 08:00 | 3:30 am | 03:30 | same day |
| 9:00 am | 09:00 | 4:30 am | 04:30 | same day |
| 10:00 am | 10:00 | 5:30 am | 05:30 | same day |
| 11:00 am | 11:00 | 6:30 am | 06:30 | same day |
| 12:00 pm | 12:00 | 7:30 am | 07:30 | same day |
| 1:00 pm | 13:00 | 8:30 am | 08:30 | same day |
| 2:00 pm | 14:00 | 9:30 am | 09:30 | same day |
| 3:00 pm | 15:00 | 10:30 am | 10:30 | same day |
| 4:00 pm | 16:00 | 11:30 am | 11:30 | same day |
| 5:00 pm | 17:00 | 12:30 pm | 12:30 | same day |
| 6:00 pm | 18:00 | 1:30 pm | 13:30 | same day |
| 7:00 pm | 19:00 | 2:30 pm | 14:30 | same day |
| 8:00 pm | 20:00 | 3:30 pm | 15:30 | same day |
| 9:00 pm | 21:00 | 4:30 pm | 16:30 | same day |
| 10:00 pm | 22:00 | 5:30 pm | 17:30 | same day |
| 11:00 pm | 23:00 | 6:30 pm | 18:30 | same day |
What are the best hours to schedule a call between IST and WEST?
3 hours of the standard 9:00 am to 5:00 pm working day line up in both zones, from 2:00 pm IST to 5:00 pm IST. In Lisbon that window reads 9:30 am to 12:30 pm. Outside it, one side is either not yet at their desk or already gone.
| IST | WEST | Working hours | Note |
|---|---|---|---|
| 2:00 pm | 9:30 am | both sides | afternoon in India, mid morning in Lisbon |
| 3:00 pm | 10:30 am | both sides | afternoon in India, mid morning in Lisbon |
| 4:00 pm | 11:30 am | both sides | afternoon in India, mid morning in Lisbon |
Does daylight saving change IST to WEST?
India Standard Time does not move its clocks at all, so its UTC+5:30 offset holds every day of the year.
Western European Time is currently on WEST and changes next on Sunday, October 25, 2026, when the clock falls back from 1:59 am to 1:00 am and the offset moves from UTC+1 to UTC+0.
Because the two sides do not move together, the answer to this conversion changes during the year. For part of the year the gap is 4 hours 30 minutes and for the rest it is 5 hours 30 minutes. The table above is built for today, not for an average day.
Is IST ahead of or behind WEST?
IST is ahead of WEST by 4 hours 30 minutes: when it is 12:00 pm in India, it is 7:30 am in Lisbon. One wrinkle worth knowing: WET and WEST are two names for the same zone, not two zones. Western European Time reads WET in winter and WEST in summer. When somebody types "ist to wet" they nearly always mean the zone rather than the literal winter offset, so this page resolves IST to Asia/Kolkata and WET to Europe/Lisbon and applies whichever offset is genuinely in force on the day.
India Standard Time covers the whole of India on a single half hour offset. Western European Time covers Lisbon, Porto and the Canary Islands, one hour behind most of the continent. The identifiers behind them are Asia/Kolkata and Europe/Lisbon, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is IST in WEST?
- IST is 4 hours 30 minutes ahead of WEST. 9:00 am IST is 4:30 am WEST.
- How many hours ahead is WEST of IST?
- WEST is 4 hours 30 minutes behind IST. That varies across the year, between 4 hours 30 minutes and 5 hours 30 minutes.
- What time is it in Lisbon right now?
- 4:46 am WEST on Sunday, September 27, 2026.
- When can India and Lisbon meet during working hours?
- Between 2:00 pm and 5:00 pm IST, which is 9:30 am to 12:30 pm WEST.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so IST and WEST are the abbreviations genuinely in force today rather than a fixed assumption.
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