Convert India Standard Time to Western Indonesian Time
Instantly convert India Standard Time (IST) to Western Indonesian Time (WIB) with our free online calculator.
India Standard Time
10:50:51 AM
Wed, Jun 24 (IST)
Western Indonesian Time
12:20:51 PM
Wed, Jun 24 (WIB)
Convert a Specific Time
24-Hour Comparison
| IST | WIB |
|---|---|
| 12:00 AM | 1.5:00 AM |
| 1:00 AM | 2.5:00 AM |
| 2:00 AM | 3.5:00 AM |
| 3:00 AM | 4.5:00 AM |
| 4:00 AM | 5.5:00 AM |
| 5:00 AM | 6.5:00 AM |
| 6:00 AM | 7.5:00 AM |
| 7:00 AM | 8.5:00 AM |
| 8:00 AM | 9.5:00 AM |
| 9:00 AM | 10.5:00 AM |
| 10:00 AM | 11.5:00 AM |
| 11:00 AM | 0.5:00 PM |
| 12:00 PM | 1.5:00 PM |
| 1:00 PM | 2.5:00 PM |
| 2:00 PM | 3.5:00 PM |
| 3:00 PM | 4.5:00 PM |
| 4:00 PM | 5.5:00 PM |
| 5:00 PM | 6.5:00 PM |
| 6:00 PM | 7.5:00 PM |
| 7:00 PM | 8.5:00 PM |
| 8:00 PM | 9.5:00 PM |
| 9:00 PM | 10.5:00 PM |
| 10:00 PM | 11.5:00 PM |
| 11:00 PM | 0.5:00 AM(+1d) |
How to Convert India Standard Time to Western Indonesian Time
Formula
To convert India Standard Time (IST) to Western Indonesian Time (WIB): Convert IST to WIB
About India Standard Time (IST)
India Standard Time (IST, IANA: Asia/Kolkata) is the civil time of the Republic of India and Sri Lanka, set at UTC+5:30 — one of the world's most populous 30-minute-offset time zones. India does not observe Daylight Saving Time per the Government of India directive (a brief DST trial in 1942-1945 during WWII was discontinued; subsequent proposals from 2010-2017 were rejected by the Indian Government citing minimal energy savings + agricultural sector disruption). IST is defined as the local mean solar time at 82.5°E longitude (passing through Shankargarh fort in Uttar Pradesh, with the reference clock at the National Physical Laboratory in New Delhi per the Indian Institute of Astrophysics). The 30-minute offset is preserved because India's east-west extent (68°E to 97°E) spans ~28° of longitude — approximately 2 hours of solar time — and the central meridian is most representative for a single unified zone. IST serves approximately 1.4 billion people in India + 22 million in Sri Lanka (Sri Lanka observes SLST = UTC+5:30, identical to IST). Major cities: Mumbai (12.5M), Delhi (16.8M, NCR 29M), Bengaluru (8.4M), Hyderabad (10M), Chennai (7M), Kolkata (4.5M), Ahmedabad (5.5M), Pune (3.1M). Affects: BSE/NSE stock exchanges, IPL Indian Premier League cricket schedules.
About Western Indonesian Time (WIB)
Western Indonesian Time (WIB — Waktu Indonesia Barat, IANA: Asia/Jakarta) is the civil time of western Indonesia, set at UTC+7:00 year-round (no DST). Indonesia spans 3 time zones (WIB UTC+7, WITA UTC+8, WIT UTC+9) covering its 17,508+ island archipelago across ~5,000 km of longitude — the world's largest archipelagic country by area. WIB serves approximately 200 million Indonesian people on Java, Sumatra, West Kalimantan, and Central Kalimantan — including the major population centers. WIB is identical in offset to Indochina Time (ICT) used by mainland Thailand/Vietnam/Cambodia/Laos. Major WIB cities: Jakarta (10.5M city, 35M metro — Indonesia's capital and Southeast Asia's largest metro after Tokyo/Delhi/Shanghai/Manila), Surabaya (2.9M city, 9.3M metro — East Java capital), Medan (2.4M — Sumatra), Bandung (2.5M — West Java), Bekasi (3M — Jakarta satellite city), Tangerang (2.4M — Jakarta satellite), Depok (2.4M — Jakarta satellite), Semarang (1.7M — Central Java), Palembang (1.7M — Sumatra). Affects: IDX (Indonesia Stock Exchange) trading hours, Jakarta KRL commuter-rail schedules, Borobudur Buddhist temple + Prambanan Hindu temple tourism schedules.