Round Rock, TX to Rio de Janeiro: time difference
Rio de Janeiro is 2 h ahead of Round Rock, TX. Live clocks for both, the working hours they share, and how each one sits against your own time.
+2 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Round Rock, TX 07:46 7:46 AM Rio de Janeiro 09:46 9:46 AM You –:–
07:46 7:46 AM
Central Daylight Time · UTC-5
☀️ 07:36 · 🌙 18:57
09:46 9:46 AM
Brasilia Standard Time · UTC-3
☀️ 05:19 · 🌙 17:59
·
+2 h
Rio de Janeiro is 2 h ahead of Round Rock, TX.
When you, Round Rock, TX and Rio de Janeiro are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇺🇸 Round Rock, TX
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇧🇷 Rio de Janeiro
2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 Round Rock, TX | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 07:46 | 09:46 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Central Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-5 | UTC-3 |
| Offset from Round Rock, TX | — | +2 h |
| IANA zone | America/Chicago | America/Sao Paulo |
| Daylight saving | On summer time → UTC-6, Nov 1, 01:00 | Not observed |
| Sunrise | 07:36 | 05:19 |
| Sunset | 18:57 | 17:59 |
| Daylight | 11 h 22 min | 12 h 40 min |
| People on this clock | 119,468 | 6,211,223 |
Compare Round Rock, TX with another city
More comparisons with Round Rock, TX: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Round Rock, TX and Rio de Janeiro: common questions
How many hours ahead of Round Rock, TX, is Rio de Janeiro?
The clocks in Rio de Janeiro are 2 hours ahead of those in Round Rock (UTC−3 and UTC−5).
What time is it in Rio de Janeiro at the start of the working day in Round Rock, TX?
The working day in Round Rock starts at 9:00 AM; in Rio de Janeiro it is 11:00 AM at that moment.
What time is it in Rio de Janeiro at the end of the working day in Round Rock, TX?
The working day in Round Rock ends at 6:00 PM; in Rio de Janeiro it is 8:00 PM at that moment.
Is there a time when both Round Rock, TX, and Rio de Janeiro are at work?
Yes: from 9:00 AM to 4:00 PM in Round Rock (11:00 AM to 6:00 PM in Rio de Janeiro), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Rio de Janeiro compared with Round Rock, TX?
The new day starts in Rio de Janeiro earlier: at 10:00 PM in Round Rock it is already midnight there. Until 2:00 AM in Rio de Janeiro, Round Rock is still on the previous day.
Does the time difference between Round Rock, TX, and Rio de Janeiro change?
Yes. The clocks change only in Round Rock. From November 1, 2026, Rio de Janeiro will be 3 hours ahead of Round Rock.
