Ottawa to Houston Time Difference
Houston is 1 hour behind Ottawa. When it's 09:33:39 AM in Ottawa, it's 08:33:39 AM in Houston.
How Many Hours Behind Is Houston From Ottawa?
Houston is 1 hour behind Ottawa. So Ottawa is 1 hour ahead of Houston looking the other way — the same gap, described from the other end.
In practice that means a working day in Ottawa starts when it is already 8:00 AM in Houston. That gap holds all year — no clock change in either city moves it.
Best Time to Call Ottawa and Houston
Both cities are inside normal business hours between 10:00 AM and 5:00 PM in Ottawa — that's 9:00 AM to 4:00 PM in Houston. That's a 7-hour window, so a call fits comfortably in either side's working day.
both at work Ottawa only Houston only neither — hours shown along the strip are Ottawa local time.
Convert a Specific Time
Pick any date and time in Ottawa to see the exact equivalent in Houston.
Common Times Converted
Ottawa time on the left, Houston time on the right.
Ottawa to Houston: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Ottawa. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Ottawa | Houston | Working hours |
|---|---|---|
| 12:00 AM | 11:00 PM prev day | — |
| 1:00 AM | 12:00 AM | — |
| 2:00 AM | 1:00 AM | — |
| 3:00 AM | 2:00 AM | — |
| 4:00 AM | 3:00 AM | — |
| 5:00 AM | 4:00 AM | — |
| 6:00 AM | 5:00 AM | — |
| 7:00 AM | 6:00 AM | — |
| 8:00 AM | 7:00 AM | — |
| 9:00 AM | 8:00 AM | Ottawa only |
| 10:00 AM | 9:00 AM | Both cities |
| 11:00 AM | 10:00 AM | Both cities |
| 12:00 PM | 11:00 AM | Both cities |
| 1:00 PM | 12:00 PM | Both cities |
| 2:00 PM | 1:00 PM | Both cities |
| 3:00 PM | 2:00 PM | Both cities |
| 4:00 PM | 3:00 PM | Both cities |
| 5:00 PM | 4:00 PM | Houston only |
| 6:00 PM | 5:00 PM | — |
| 7:00 PM | 6:00 PM | — |
| 8:00 PM | 7:00 PM | — |
| 9:00 PM | 8:00 PM | — |
| 10:00 PM | 9:00 PM | — |
| 11:00 PM | 10:00 PM | — |
Understanding the Ottawa – Houston Time Difference
Ottawa runs on America/Toronto, currently EDT (UTC-4:00). Houston runs on America/Chicago, currently CDT (UTC-5:00). The gap of 1 hour is simply the distance between those two offsets.
This difference holds steady all year — no clock change in either city moves it. A meeting time that works in January works just as well in July.
Ottawa today
Houston today
Frequently Asked Questions
What is the time difference between Ottawa and Houston?
Houston is currently 1 hour behind Ottawa. This difference holds all year — no clock change in either city moves it.
How many hours behind is Houston from Ottawa?
Houston is 1 hour behind Ottawa. Looking at it the other way, Ottawa is 1 hour ahead of Houston.
What time is it in Houston when it is 9:00 AM in Ottawa?
When it is 9:00 AM in Ottawa, it is 8:00 AM in Houston.
Is Houston ahead of or behind Ottawa?
Houston is 1 hour behind Ottawa. Ottawa reaches each point in the day first, so Houston is still getting started while the Ottawa working day is finishing.
What is the best time to call between Ottawa and Houston?
Between 10:00 AM and 5:00 PM Ottawa time, which is 9:00 AM to 4:00 PM in Houston. Both cities are inside normal business hours during that window.
Does the time difference between Ottawa and Houston change during the year?
No. The difference between Ottawa and Houston stays fixed all year round — no clock change in either city moves it.
What time zones are Ottawa and Houston in?
Ottawa uses the America/Toronto time zone, currently EDT (UTC-4:00). Houston uses America/Chicago, currently CDT (UTC-5:00).