Convert hours to milliseconds
1 h = 3,600,000 ms. Change the amount below, or read the formula and the reference table further down.
1 hour equals
milliseconds
1 h = 3,600,000 ms
The formula
Hours and milliseconds both measure time from the same zero, so a single multiplier does the job.
ms = h × 3,600,000
Going the other way? Convert milliseconds to hours.
Hours to milliseconds table
Common values, rounded for reading.
| Hours (h) | Milliseconds (ms) |
|---|---|
| 1 | 3,600,000 |
| 2 | 7,200,000 |
| 3 | 10,800,000 |
| 4 | 14,400,000 |
| 5 | 18,000,000 |
| 6 | 21,600,000 |
| 7 | 25,200,000 |
| 8 | 28,800,000 |
| 9 | 32,400,000 |
| 10 | 36,000,000 |
| 15 | 54,000,000 |
| 20 | 72,000,000 |
| 25 | 90,000,000 |
| 30 | 108,000,000 |
| 40 | 144,000,000 |
| 50 | 180,000,000 |
| 75 | 270,000,000 |
| 100 | 360,000,000 |
| 250 | 900,000,000 |
| 500 | 1,800,000,000 |
| 1,000 | 3,600,000,000 |
Questions people ask
- How many milliseconds are in a hour?
- One hour equals 3,600,000 milliseconds.
- How do I convert hours to milliseconds by hand?
- Multiply the number of hours by 3,600,000. For a rough check, 3,600,000 is close enough for most everyday use.
- What is 1 hour in milliseconds?
- 1 hour is 3,600,000 milliseconds.
Calcuit generates this page from a unit table, so the factors here match every other page on the site.