BRT to IST Converter & Meeting Planner
Quick answer: 9:00 AM BRT = 5:30 PM IST (fixed -03:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Brasília Time (BRT) and Indian Standard Time (IST)? You need to account for the standard time difference. Indian Standard Time is normally 8.5 hours ahead of Brasília Time. Whether you are coordinating between teams in São Paulo and Rio de Janeiro and Mumbai and New Delhi, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM BRT = 8:30 AM IST. The full 24-hour BRT to IST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM BRT = 11:30 PM IST.
| BRT Time | IST Time |
|---|---|
| 12:00 AM (00:00) | 8:30 AM (08:30) |
| 1:00 AM (01:00) | 9:30 AM (09:30) |
| 2:00 AM (02:00) | 10:30 AM (10:30) |
| 3:00 AM (03:00) | 11:30 AM (11:30) |
| 4:00 AM (04:00) | 12:30 PM (12:30) |
| 5:00 AM (05:00) | 1:30 PM (13:30) |
| 6:00 AM (06:00) | 2:30 PM (14:30) |
| 7:00 AM (07:00) | 3:30 PM (15:30) |
| 8:00 AM (08:00) | 4:30 PM (16:30) |
| 9:00 AM (09:00) | 5:30 PM (17:30) |
| 10:00 AM (10:00) | 6:30 PM (18:30) |
| 11:00 AM (11:00) | 7:30 PM (19:30) |
| 12:00 PM (12:00) | 8:30 PM (20:30) |
| 1:00 PM (13:00) | 9:30 PM (21:30) |
| 2:00 PM (14:00) | 10:30 PM (22:30) |
| 3:00 PM (15:00) | 11:30 PM (23:30) |
| 4:00 PM (16:00) | 12:30 AM (00:30)+1 day |
| 5:00 PM (17:00) | 1:30 AM (01:30)+1 day |
| 6:00 PM (18:00) | 2:30 AM (02:30)+1 day |
| 7:00 PM (19:00) | 3:30 AM (03:30)+1 day |
| 8:00 PM (20:00) | 4:30 AM (04:30)+1 day |
| 9:00 PM (21:00) | 5:30 AM (05:30)+1 day |
| 10:00 PM (22:00) | 6:30 AM (06:30)+1 day |
| 11:00 PM (23:00) | 7:30 AM (07:30)+1 day |
Best time to call Mumbai from São Paulo
For most work calls, compare the normal business day in São Paulo (BRT) with the business day in Mumbai (IST). BRT commonly covers South America, while IST is mainly associated with South Asia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 9:00 AM - 10:00 AM BRT, which corresponds to 5:30 PM - 6:30 PM IST. This window sits inside the typical BRT workday (9:00 AM - 6:00 PM) and the IST workday (9:30 AM - 6:30 PM).
- DST Safety: Neither BRT nor IST uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- B3 (Brasil Bolsa Balcão): 10:00-17:00 local time in São Paulo.
- Bombay Stock Exchange (BSE): 09:15-15:30 local time in Mumbai.
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Frequently Asked Questions
What is the time difference between BRT and IST?
During standard time, Indian Standard Time is 8.5 hours ahead of Brasília Time.
Does Brazil observe Daylight Saving Time?
Brazil officially abolished Daylight Saving Time by presidential decree in April 2019, ending a practice that had been observed in the country's southeastern states since 1985. BRT has remained fixed at UTC-3:00 every day of the year since then, meaning the B3 stock exchange, federal government, and all Brazilian commercial operations run on a permanent, unchanging offset.
Is BRT the same as Argentina Time (ART)?
BRT (Brasília Time) and ART (Argentina Time) share the identical UTC-3:00 offset and neither country observes Daylight Saving Time, making São Paulo and Buenos Aires permanently synchronized on the same clock. Despite the different official designations, a meeting set for 10:00 BRT in São Paulo falls at exactly 10:00 ART in Buenos Aires — a fixed relationship that never shifts seasonally.
Does India observe Daylight Saving Time (DST)?
India does not observe Daylight Saving Time and has not done so since 1945. IST remains fixed at UTC+5:30 every day of the year, meaning the offset between India and any DST-observing country shifts by one hour twice annually when those countries change their clocks.
Why does IST have a 30-minute offset?
India chose the 82.5° East meridian — which passes through Mirzapur in Uttar Pradesh — as its central reference longitude, as it bisects the subcontinent geographically. That meridian sits exactly 5 hours and 30 minutes ahead of the Prime Meridian in Greenwich, producing the UTC+5:30 offset that has defined IST since 1906.