BRT to GMT Converter & Meeting Planner
Quick answer: 9:00 AM BRT = 12:00 PM GMT (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 Greenwich Mean Time (GMT)? You need to account for the standard time difference. Greenwich Mean Time is normally 3 hours ahead of Brasília Time. Whether you are coordinating between teams in São Paulo and Rio de Janeiro and London and Dublin, 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 = 3:00 AM GMT. The full 24-hour BRT to GMT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM BRT = 6:00 PM GMT.
| BRT Time | GMT Time |
|---|---|
| 12:00 AM (00:00) | 3:00 AM (03:00) |
| 1:00 AM (01:00) | 4:00 AM (04:00) |
| 2:00 AM (02:00) | 5:00 AM (05:00) |
| 3:00 AM (03:00) | 6:00 AM (06:00) |
| 4:00 AM (04:00) | 7:00 AM (07:00) |
| 5:00 AM (05:00) | 8:00 AM (08:00) |
| 6:00 AM (06:00) | 9:00 AM (09:00) |
| 7:00 AM (07:00) | 10:00 AM (10:00) |
| 8:00 AM (08:00) | 11:00 AM (11:00) |
| 9:00 AM (09:00) | 12:00 PM (12:00) |
| 10:00 AM (10:00) | 1:00 PM (13:00) |
| 11:00 AM (11:00) | 2:00 PM (14:00) |
| 12:00 PM (12:00) | 3:00 PM (15:00) |
| 1:00 PM (13:00) | 4:00 PM (16:00) |
| 2:00 PM (14:00) | 5:00 PM (17:00) |
| 3:00 PM (15:00) | 6:00 PM (18:00) |
| 4:00 PM (16:00) | 7:00 PM (19:00) |
| 5:00 PM (17:00) | 8:00 PM (20:00) |
| 6:00 PM (18:00) | 9:00 PM (21:00) |
| 7:00 PM (19:00) | 10:00 PM (22:00) |
| 8:00 PM (20:00) | 11:00 PM (23:00) |
| 9:00 PM (21:00) | 12:00 AM (00:00)+1 day |
| 10:00 PM (22:00) | 1:00 AM (01:00)+1 day |
| 11:00 PM (23:00) | 2:00 AM (02:00)+1 day |
Best time to call London from São Paulo
For most work calls, compare the normal business day in São Paulo (BRT) with the business day in London (GMT). BRT commonly covers South America, while GMT is mainly associated with Europe, Africa.
⚠️ 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 - 1:00 PM BRT, which corresponds to 1:00 PM - 5:00 PM GMT. This window sits inside the typical BRT workday (9:00 AM - 6:00 PM) and the GMT workday (9:00 AM - 5:00 PM).
- DST Safety: BRT or GMT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- B3 (Brasil Bolsa Balcão): 10:00-17:00 local time in São Paulo.
- London Stock Exchange: 08:00-16:30 local time in London.
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Frequently Asked Questions
What is the time difference between BRT and GMT?
During standard time, Greenwich Mean Time is 3 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.
What is the difference between GMT and BST?
GMT (Greenwich Mean Time) is the UK's standard winter offset at UTC+0, observed from the last Sunday in October through the last Sunday in March. BST (British Summer Time) is the daylight saving offset at UTC+1, applied each summer when clocks advance one hour.
Is GMT the same as UTC?
GMT and UTC share exactly the same numerical offset — both represent UTC+00:00 — but they are fundamentally different in nature. UTC is an atomic-clock-based international time standard used as the global reference, while GMT is a geographic time zone legally observed by specific countries including the United Kingdom and Ireland during winter months.