Time difference
Houston to Sydney Time Difference
Sydney is 15 hours ahead of Houston — when it's 12:00 PM in Houston, it's 3:00 AM the next day in Sydney. (Houston (America/Chicago, CDT); Sydney (Australia/Sydney, AEST).) Below: live local times, the best hours for a call, a full conversion table, and exact daylight-saving dates.
Sydney is 15 hours ahead of Houston. Standard 9 AM–5 PM business hours in Houston and Sydney do not overlap, so a live call needs one side outside normal hours. Clocks change on October 4, 2026, which briefly shifts the gap between Houston and Sydney — the converter on this page always reflects the correct offset for the date you pick.
- When it's 9:00 AM in Houston, it's 12:00 AM the next day in Sydney.
- When it's 9:00 AM in Sydney, it's 6:00 PM the previous day in Houston.
Sydney is currently 15 hours ahead of Houston.
Interactive converter
12:00PM
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Best times to meet
Standard 9 AM – 5 PM hours in Houston and Sydney do not overlap. The least-bad options are an early start in one city or a late evening call in the other — for example a 7–8 AM meeting in Houston, or a 6–8 PM meeting in Sydney.
Quick conversion table
| Houston | Sydney |
|---|---|
| 12 AM | 3:00 PM |
| 1 AM | 4:00 PM |
| 2 AM | 5:00 PM |
| 3 AM | 6:00 PM |
| 4 AM | 7:00 PM |
| 5 AM | 8:00 PM |
| 6 AM | 9:00 PM |
| 7 AM | 10:00 PM |
| 8 AM | 11:00 PM |
| 9 AM | 12:00 AM (next day) |
| 10 AM | 1:00 AM (next day) |
| 11 AM | 2:00 AM (next day) |
| 12 PM | 3:00 AM (next day) |
| 1 PM | 4:00 AM (next day) |
| 2 PM | 5:00 AM (next day) |
| 3 PM | 6:00 AM (next day) |
| 4 PM | 7:00 AM (next day) |
| 5 PM | 8:00 AM (next day) |
| 6 PM | 9:00 AM (next day) |
| 7 PM | 10:00 AM (next day) |
| 8 PM | 11:00 AM (next day) |
| 9 PM | 12:00 PM (next day) |
| 10 PM | 1:00 PM (next day) |
| 11 PM | 2:00 PM (next day) |
Daylight saving
On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 16 hours ahead of Houston (currently 15 hours ahead of Houston). The converter and the tables above always reflect the correct offset for the date you pick.
- Houston is currently observing daylight saving time.
- Sydney is not currently observing daylight saving time (standard time is in effect).
Frequently asked questions
- Is Sydney ahead of or behind Houston?
- Sydney is 15 hours ahead of Houston.
- How many hours ahead of Houston is Sydney?
- Sydney is 15 hours ahead of Houston.
- What time is 9 AM in Houston in Sydney?
- 9:00 AM in Houston is 12:00 AM the next day in Sydney.
- What time is noon in Houston in Sydney?
- 12:00 PM in Houston is 3:00 AM the next day in Sydney.
- What time is 5 PM in Houston in Sydney?
- 5:00 PM in Houston is 8:00 AM the next day in Sydney. Useful for end-of-day handoffs between the two offices.
- What time is 3 PM in Houston in Sydney?
- 3:00 PM in Houston is 6:00 AM the next day in Sydney.
- Is Houston currently observing daylight saving time?
- Houston is currently observing daylight saving time (summer time).
- Is Sydney currently observing daylight saving time?
- Sydney observes daylight saving time seasonally, but is not currently on DST (standard time is in effect).
- Do Houston and Sydney observe daylight saving?
- On October 4, 2026, Sydney shifts for daylight saving. After that, Sydney will be 16 hours ahead of Houston (currently 15 hours ahead of Houston). The converter and the tables above always reflect the correct offset for the date you pick.
- When is the best time to call Sydney from Houston?
- Houston and Sydney business hours don't overlap. The closest options are early mornings in Houston or late evenings, when one side stretches outside 9–5.
- When is the best time to call Houston from Sydney?
- Sydney and Houston business hours don't overlap. The closest options are early mornings in Sydney or late evenings, when one side stretches outside 9–5.
- Houston (CDT) to Sydney (AEST) — how do I convert quickly?
- Add 15 hours to Houston local time to get Sydney local time. Or use the converter at the top of this page — it stays accurate through daylight-saving changes automatically.
Other conversions
- Houston to New York
- Houston to London
- Houston to Tokyo
- Dubai to Houston
- Houston to Singapore
- Houston to Los Angeles
- Houston to Paris
- Houston to Mumbai
- Hong Kong to Houston
- Houston to San Francisco