Time difference
Mumbai to Surabaya Time Difference
Surabaya is 1 hour and 30 minutes ahead of Mumbai — when it's 12:00 PM in Mumbai, it's 1:30 PM in Surabaya. (Mumbai (Asia/Kolkata, IST); Surabaya (Asia/Jakarta, WIB).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Surabaya is 1 hour and 30 minutes ahead of Mumbai. The best window for a call is 9 AM–3:30 PM in Mumbai, which is 10:30 AM–5 PM in Surabaya — an overlap of 6 hours and 30 minutes inside 9 AM–5 PM on both sides. Mumbai and Surabaya change their clocks together (or don't change at all), so the time difference between them stays the same all year.
- When it's 9:00 AM in Mumbai, it's 10:30 AM in Surabaya.
- When it's 9:00 AM in Surabaya, it's 7:30 AM in Mumbai.
Surabaya is currently 1 hour and 30 minutes ahead of Mumbai.
Interactive converter
12:00PM
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Best times to meet
The 9 AM – 5 PM business windows in Mumbai and Surabaya overlap for 6 hours and 30 minutes. 9 AM–3:30 PM in Mumbai is 10:30 AM–5 PM in Surabaya. Aim somewhere in the middle of that window so neither side starts cold or finishes drained.
Quick conversion table
| Mumbai | Surabaya |
|---|---|
| 12 AM | 1:30 AM |
| 1 AM | 2:30 AM |
| 2 AM | 3:30 AM |
| 3 AM | 4:30 AM |
| 4 AM | 5:30 AM |
| 5 AM | 6:30 AM |
| 6 AM | 7:30 AM |
| 7 AM | 8:30 AM |
| 8 AM | 9:30 AM |
| 9 AM | 10:30 AM |
| 10 AM | 11:30 AM |
| 11 AM | 12:30 PM |
| 12 PM | 1:30 PM |
| 1 PM | 2:30 PM |
| 2 PM | 3:30 PM |
| 3 PM | 4:30 PM |
| 4 PM | 5:30 PM |
| 5 PM | 6:30 PM |
| 6 PM | 7:30 PM |
| 7 PM | 8:30 PM |
| 8 PM | 9:30 PM |
| 9 PM | 10:30 PM |
| 10 PM | 11:30 PM |
| 11 PM | 12:30 AM (next day) |
Daylight saving
The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- Mumbai does not observe daylight saving time.
- Surabaya does not observe daylight saving time.
Frequently asked questions
- Is Surabaya ahead of or behind Mumbai?
- Surabaya is 1 hour and 30 minutes ahead of Mumbai.
- How many hours ahead of Mumbai is Surabaya?
- Surabaya is 1 hour and 30 minutes ahead of Mumbai.
- What time is 9 AM in Mumbai in Surabaya?
- 9:00 AM in Mumbai is 10:30 AM in Surabaya.
- What time is noon in Mumbai in Surabaya?
- 12:00 PM in Mumbai is 1:30 PM in Surabaya.
- What time is 5 PM in Mumbai in Surabaya?
- 5:00 PM in Mumbai is 6:30 PM in Surabaya. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Mumbai in Surabaya?
- 3:00 PM in Mumbai is 4:30 PM in Surabaya.
- Is Mumbai currently observing daylight saving time?
- Mumbai does not observe daylight saving time — its UTC offset stays the same all year.
- Is Surabaya currently observing daylight saving time?
- Surabaya does not observe daylight saving time — its UTC offset stays the same all year.
- Do Mumbai and Surabaya observe daylight saving?
- The time difference between these two cities stays the same over the next twelve months — neither zone is changing for daylight saving in that window.
- When is the best time to call Surabaya from Mumbai?
- Aim for 9 AM–3:30 PM in Mumbai, which is 10:30 AM–5 PM in Surabaya.
- When is the best time to call Mumbai from Surabaya?
- Aim for 10:30 AM–5 PM in Surabaya, which is 9 AM–3:30 PM in Mumbai.
- Mumbai (IST) to Surabaya (WIB) — how do I convert quickly?
- Add 1 hour and 30 minutes to Mumbai local time to get Surabaya local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
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