1 day = 24 hours
Convert days to hours.
Both directions on one page — swap the units and the whole thing runs backwards.
Type a value, or “5cm to in”
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The formula
h = d × 24
Worked through with a real value: 10 days = 240 hours.
Going the other way: d = h × 0.0416667, so 1 hour = 0.0416667 days.
What each unit is
- day d
- Twenty-four hours, the time of one complete Earth rotation and the calendar base unit.
- hour h
- Sixty minutes, the everyday unit for schedules, appointments and travel time.
Where these come from
- 1 day = 86400 seconds
- 1 hour = 3600 seconds
Every other number on this page is computed from those, and each category is pinned to conversions worked out by hand from the units' primary definitions before it ships.
Conversion tables
| days (d) | hours (h) |
|---|---|
| 1 | 24 |
| 2 | 48 |
| 3 | 72 |
| 4 | 96 |
| 5 | 120 |
| 6 | 144 |
| 7 | 168 |
| 8 | 192 |
| 9 | 216 |
| 10 | 240 |
| 20 | 480 |
| 25 | 600 |
| 50 | 1200 |
| 75 | 1800 |
| 100 | 2400 |
| hours (h) | days (d) |
|---|---|
| 1 | 0.0416667 |
| 2 | 0.0833333 |
| 3 | 0.125 |
| 4 | 0.166667 |
| 5 | 0.208333 |
| 6 | 0.25 |
| 7 | 0.291667 |
| 8 | 0.333333 |
| 9 | 0.375 |
| 10 | 0.416667 |
| 20 | 0.833333 |
| 25 | 1.04167 |
| 50 | 2.08333 |
| 75 | 3.125 |
| 100 | 4.16667 |
Questions
How many hours are in a day?
1 day = 24 hours.
How do I convert days to hours?
Use h = d × 24. For example, 10 days = 240 hours.
How many days are in one hour?
1 hour = 0.0416667 days.
What is 10 days in hours?
10 days = 240 hours.
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