IST to WIB: IST is 1 hour 30 minutes behind WIB
India Standard Time is 1 hour 30 minutes behind Western Indonesia Time, on every day of the year. It is 6:11 am IST in India and 7:41 am WIB in Jakarta.
Convert a specific time from IST to WIB
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 WIB?
Western Indonesia Time is 1 hour 30 minutes ahead of India Standard Time. To go from IST to WIB you add 1 hour 30 minutes. That gap holds on all 365 days of 2026: neither zone moves its clocks.
IST to WIB conversion table
Every hour of Sunday, September 27, 2026 in India, with the matching reading in Jakarta. 1 of the 24 hours land on a different calendar date in Jakarta, which is the part people get wrong when they schedule across this pair.
| IST | IST 24h | WIB | WIB 24h | Date |
|---|---|---|---|---|
| 12:00 am | 00:00 | 1:30 am | 01:30 | same day |
| 1:00 am | 01:00 | 2:30 am | 02:30 | same day |
| 2:00 am | 02:00 | 3:30 am | 03:30 | same day |
| 3:00 am | 03:00 | 4:30 am | 04:30 | same day |
| 4:00 am | 04:00 | 5:30 am | 05:30 | same day |
| 5:00 am | 05:00 | 6:30 am | 06:30 | same day |
| 6:00 am | 06:00 | 7:30 am | 07:30 | same day |
| 7:00 am | 07:00 | 8:30 am | 08:30 | same day |
| 8:00 am | 08:00 | 9:30 am | 09:30 | same day |
| 9:00 am | 09:00 | 10:30 am | 10:30 | same day |
| 10:00 am | 10:00 | 11:30 am | 11:30 | same day |
| 11:00 am | 11:00 | 12:30 pm | 12:30 | same day |
| 12:00 pm | 12:00 | 1:30 pm | 13:30 | same day |
| 1:00 pm | 13:00 | 2:30 pm | 14:30 | same day |
| 2:00 pm | 14:00 | 3:30 pm | 15:30 | same day |
| 3:00 pm | 15:00 | 4:30 pm | 16:30 | same day |
| 4:00 pm | 16:00 | 5:30 pm | 17:30 | same day |
| 5:00 pm | 17:00 | 6:30 pm | 18:30 | same day |
| 6:00 pm | 18:00 | 7:30 pm | 19:30 | same day |
| 7:00 pm | 19:00 | 8:30 pm | 20:30 | same day |
| 8:00 pm | 20:00 | 9:30 pm | 21:30 | same day |
| 9:00 pm | 21:00 | 10:30 pm | 22:30 | same day |
| 10:00 pm | 22:00 | 11:30 pm | 23:30 | same day |
| 11:00 pm | 23:00 | 12:30 am | 00:30 | the next day |
What are the best hours to schedule a call between IST and WIB?
7 hours of the standard 9:00 am to 5:00 pm working day line up in both zones, from 9:00 am IST to 4:00 pm IST. In Jakarta that window reads 10:30 am to 5:30 pm. Outside it, one side is either not yet at their desk or already gone.
| IST | WIB | Working hours | Note |
|---|---|---|---|
| 9:00 am | 10:30 am | both sides | mid morning in India, mid morning in Jakarta |
| 10:00 am | 11:30 am | both sides | mid morning in India, mid morning in Jakarta |
| 11:00 am | 12:30 pm | both sides | mid morning in India, noon in Jakarta |
| 12:00 pm | 1:30 pm | both sides | noon in India, afternoon in Jakarta |
| 1:00 pm | 2:30 pm | both sides | afternoon in India, afternoon in Jakarta |
| 2:00 pm | 3:30 pm | both sides | afternoon in India, afternoon in Jakarta |
| 3:00 pm | 4:30 pm | both sides | afternoon in India, afternoon in Jakarta |
Does daylight saving change IST to WIB?
India Standard Time does not move its clocks at all, so its UTC+5:30 offset holds every day of the year.
Western Indonesia Time does not move its clocks at all, so its UTC+7 offset holds every day of the year.
Is IST ahead of or behind WIB?
IST is behind WIB by 1 hour 30 minutes: when it is 12:00 pm in India, it is 1:30 pm in Jakarta. Neither India Standard Time nor Western Indonesia Time observes daylight saving, so the abbreviations never change and the gap between them is fixed.
India Standard Time covers the whole of India on a single half hour offset. Western Indonesia Time covers Jakarta, Bandung and Medan, the most populous of the three Indonesian zones. The identifiers behind them are Asia/Kolkata and Asia/Jakarta, which is what any calendar or scheduling system should be storing rather than a fixed number of hours.
Questions
- What is IST in WIB?
- IST is 1 hour 30 minutes behind WIB. 9:00 am IST is 10:30 am WIB.
- How many hours ahead is WIB of IST?
- WIB is 1 hour 30 minutes ahead of IST.
- What time is it in Jakarta right now?
- 7:41 am WIB on Sunday, September 27, 2026.
- When can India and Jakarta meet during working hours?
- Between 9:00 am and 4:00 pm IST, which is 10:30 am to 5:30 pm WIB.
- Does this account for daylight saving?
- Yes. Every reading is computed from the IANA database for the actual date, so IST and WIB are the abbreviations genuinely in force today rather than a fixed assumption.
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