How to convert days to hours
h = d × 24Multiply the value in days by 24. To go the other way, multiply by 0.04166666667 (or divide by 24).
A day is larger than an hour: one day contains 24 hours.
Worked examples
- 1 day1 d × 24 = 24 h
- 5 days5 d × 24 = 120 h
- 10 days10 d × 24 = 240 h
- 20 days20 d × 24 = 480 h
- 100 days100 d × 24 = 2,400 h
Days to hours conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Days (d) | Hours (h) |
|---|---|
| 0.1 d | 2.4 h |
| 0.25 d | 6 h |
| 0.5 d | 12 h |
| 1 d | 24 h |
| 2 d | 48 h |
| 3 d | 72 h |
| 4 d | 96 h |
| 5 d | 120 h |
| 6 d | 144 h |
| 7 d | 168 h |
| 8 d | 192 h |
| 9 d | 216 h |
| 10 d | 240 h |
| Days (d) | Hours (h) |
|---|---|
| 12 d | 288 h |
| 15 d | 360 h |
| 20 d | 480 h |
| 25 d | 600 h |
| 30 d | 720 h |
| 40 d | 960 h |
| 50 d | 1,200 h |
| 75 d | 1,800 h |
| 100 d | 2,400 h |
| 250 d | 6,000 h |
| 500 d | 12,000 h |
| 1,000 d | 24,000 h |
About the units
Day (d)
Twenty-four hours (86,400 s) — the civil day, ignoring occasional leap seconds.
Hour (h)
Sixty minutes, or 3,600 seconds.
Frequently asked questions
How many hours are in one day?
There are 24 hours in one day, and this value is exact by definition.
How do I convert days to hours?
Multiply the number of days by 24. For example, 10 d × 24 = 240 h.
How many days are in one hour?
One hour equals 0.04166666667 days. That is the reverse factor, 1 ÷ 24.
What is 10 days in hours?
10 d = 240 h.
Is this d to h converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.