Convert Day to Hour
Use this free converter to change days (d) into hours (h). Day and hour both measure time. As a quick reference, 1 d equals 24 h, and 1 h equals 0.041666667 d.
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Hour (h)
24
1 d = 24 h
Time conversion table
| Day | Hour |
|---|---|
| 0.01 | 0.24 |
| 0.1 | 2.4 |
| 0.5 | 12 |
| 1 | 24 |
| 2 | 48 |
| 3 | 72 |
| 5 | 120 |
| 10 | 240 |
| 20 | 480 |
| 25 | 600 |
| 50 | 1200 |
| 100 | 2400 |
| 1,000 | 24000 |
How to convert Day to Hour
Multiply the day value by 24 to get hours.
- Enter the number of days you want to convert.
- The converter instantly shows the equivalent value in hours.
- Worked example: 15 d × 24 = 360 h.
- Use the swap button to reverse the conversion (hour to day).
About these units
Day (d)
- Definition
- A day (d) is the time for one rotation of the Earth, taken as exactly 86,400 seconds.
- History
- The day is one of the oldest natural time units, tied to the cycle of sunlight.
- Current use
- Days are the basic unit of calendars and scheduling everywhere.
Hour (h)
- Definition
- An hour (h) is a unit of time equal to 60 minutes, or 3,600 seconds.
- History
- Ancient Egyptians divided day and night into twelve parts each, giving the 24-hour day.
- Current use
- Hours organise work, travel, and daily life around the globe.
Frequently asked questions
How many hours are in a day?
There are 24 h in 1 d. To convert, multiply the number of days by 24.
How do I convert days to hours?
Multiply the day value by 24 to get hours. For example, 10 d = 240 h.
Is this day-to-hour converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Day to other time units
| Unit | 1 Day equals |
|---|---|
| Second (s) | 86400 s |
| Millisecond (ms) | 86400000 ms |
| Microsecond (µs) | 86400000000 µs |
| Minute (min) | 1440 min |
| Hour (h) | 24 h |
| Week (wk) | 0.14285714 wk |
| Month (mo) | 0.032854209 mo |
| Year (yr) | 0.0027378508 yr |