IST to Jakarta
+1h 30mIST
ISTSOURCEJakarta
WIBGreen rows indicate typical business hours (9 AM - 5 PM)
IST and WIB on the World Map
The map below highlights the IST (India Standard Time) and WIB (Western Indonesia Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
WIB – Western Indonesia Time
UTC+07:00Western Indonesia Time (WIB, UTC+07:00) covers Java, Sumatra and West Kalimantan, including Jakarta.
- •Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00).
- •Indonesia has not observed daylight saving time since 1964.
- •Jakarta is the largest city in Southeast Asia by population.
- •WIB shares the UTC+07:00 offset with Indochina Time.
About Jakarta
WikipediaJakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.
Indonesia has 3 time zones; Jakarta uses Western Indonesia Time (WIB).
Time Conversion Guide: IST to Jakarta
IST runs on India Standard Time (IST) at UTC+05:30. Jakarta runs on Western Indonesia Time (WIB) at UTC+07:00. That puts IST 1 hour 30 minutes ahead of Jakarta — a difference of +1h 30m at the current offsets.
In practice, when it is 9:00 AM in IST it is 10:30 AM in Jakarta. Midnight in IST is 1:30 AM in Jakarta. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IST to Jakarta time conversion table
| IST (IST) | Jakarta (WIB) | Day |
|---|---|---|
| 12:00 AM | 1:30 AM | same day |
| 6:00 AM | 7:30 AM | same day |
| 7:00 AM | 8:30 AM | same day |
| 8:00 AM | 9:30 AM | same day |
| 9:00 AM | 10:30 AM | same day |
| 12:00 PM | 1:30 PM | same day |
| 3:00 PM | 4:30 PM | same day |
| 5:00 PM | 6:30 PM | same day |
| 6:00 PM | 7:30 PM | same day |
| 9:00 PM | 10:30 PM | same day |
Why people convert IST to Jakarta time
- Scheduling a call from IST to Jakarta: a 10:00 AM start in IST lands at 11:30 AM in Jakarta, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IST and Jakarta are inside the 9-to-5 working day between 9:00 AM and 3:30 PM IST time (10:30 AM–5:00 PM WIB). That is roughly 6 hours 30 minutes of usable overlap.
- Watching a live event or market open: IST viewers need 10:30 AM in Jakarta to catch a 9:00 AM start there, and 10:30 PM if the event is anchored to IST.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a +1h 30m gap is not.
- Block 9:00 AM–3:30 PM IST as the recurring meeting window if you work primarily from IST and need Jakarta colleagues present.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
About WIB (Western Indonesia Time)
Western Indonesia Time (WIB, Waktu Indonesia Barat) is one of Indonesia's three time zones, fixed at UTC+07:00 all year. It covers Java, Sumatra, West Kalimantan and the provinces around them — home to Jakarta, the country's capital and largest city, plus Surabaya and Bandung. Indonesia does not observe daylight saving time, so WIB never shifts. WIB shares its UTC+07:00 offset with Indochina Time (ICT) and Christmas Island Time, but is a distinct zone covering the western half of the Indonesian archipelago. The country's other zones are WITA (UTC+08:00) in the centre and WIT (UTC+09:00) in the east.
Best time to call between IST and Jakarta
Both IST and Jakarta sit inside the 9 AM – 5 PM working day between 9:00 AM–3:30 PM IST, which is 10:30 AM–5:00 PM WIB. That gives roughly 6 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IST and Jakarta share 6 hours of working-hours overlap (9:00 AM–3:30 PM IST), so scheduling a live meeting is straightforward.
IST is 1 hour 30 minutes ahead of Jakarta (IST UTC+05:30 → WIB UTC+07:00). The shared working window is 9:00 AM–3:30 PM IST. Remember to re-check around daylight-saving transitions.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between IST and Jakarta?
IST (IST, UTC+05:30) is 1 hour 30 minutes ahead of Jakarta (WIB, UTC+07:00). The gap is currently +1h 30m.
How do I convert IST time to Jakarta time?
Add +1h 30m to IST local time. For example, 9:00 AM in IST is 10:30 AM in Jakarta.
What time is it in Jakarta right now?
Jakarta uses WIB at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h 30m offset from IST.
What is the best time to call Jakarta from IST?
Call between 9:00 AM and 3:30 PM IST — that maps to 10:30 AM–5:00 PM WIB and keeps both parties inside the working day.
Which is ahead, IST or Jakarta?
IST is 1 hour 30 minutes ahead of Jakarta. When it is 12:00 PM in IST it is 1:30 PM in Jakarta.
Do IST and Jakarta use different time zones?
IST uses IST at UTC+05:30, while Jakarta (Indonesia) uses WIB at UTC+07:00. The IANA identifiers are Asia/Kolkata and Asia/Jakarta.
Does daylight saving time affect the IST–Jakarta difference?
Neither zone observes daylight saving time, so the +1h 30m offset between IST and Jakarta is fixed all year.
Which other cities share IST's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, IST's zone?
IST is used in India, Sri Lanka.
Is there a day difference between IST and Jakarta?
Not normally. The +1h 30m gap only pushes the date over for late-evening times.
What is the time difference between IST and Jakarta?
Jakarta is +1h 30m from IST.
What timezone is IST in?
IST operates on its local timezone.
What timezone is Jakarta in?
Jakarta operates on Western Indonesia Time (WIB), UTC+7. As Southeast Asia's largest economy, Jakarta's IDX is a key emerging market exchange.
What are the business hours in Jakarta?
Standard business hours in Jakarta are 8:00 AM - 5:00 PM WIB.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
Which cities are in the WIB timezone?
Major cities in the WIB timezone include Jakarta, Surabaya, Bandung, Medan, Palembang.
What is the UTC offset for WIB?
Western Indonesia Time (WIB) is at UTC+07:00.
What should I know about the WIB timezone?
Indonesia spans three time zones: WIB (UTC+07:00), WITA (UTC+08:00) and WIT (UTC+09:00). Indonesia has not observed daylight saving time since 1964.
When is it midnight in IST, what time is it in Jakarta?
When it is 12:00 AM (midnight) in IST (IST), it is +1h 30m later in Jakarta (WIB).
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