Convert Days to Hours
1 day is 24 h. One day is exactly 24 hours.
One day is 24 hours. To convert days to hours, multiply by 24; to go the other way, divide by 24 or multiply by 0.041666667. The factor is exact rather than rounded: it follows from BIPM SI Brochure. Exactly 86,400 seconds by convention.
Factor checked against the defining standard · How we check
Hours
24 h
- Days × 24
value * 2424 h
1 day in every time unit
| Unit | Value | Exact factor |
|---|---|---|
| seconds | 86,400 s | × 86,400 |
| minutes | 1,440 min | × 1,440 |
| hours | 24 h | × 24 |
| days (as entered) | 1 d | — |
| weeks | 0.1428571429 wk | × 0.142857142857 |
| months | 0.03285488408 mo | × 0.0328548840839 |
| years | 0.002737907007 yr | × 0.00273790700699 |
Factors are entered by hand from BIPM SI Brochure rather than derived from a units library, so the ones that terminate are exact rather than rounded.
How do you convert days to hours?
- 1.Take the measurement in days.
- 2.Multiply by 24 — that is how many hours fit in one day.
- 3.To go back the other way, divide by 24, or multiply by 0.041666667.
Days to hours conversion table
| Days | Hours |
|---|---|
| 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 |
| 12 d | 288 h |
| 15 d | 360 h |
| 20 d | 480 h |
| 25 d | 600 h |
| 50 d | 1,200 h |
| 100 d | 2,400 h |
What are days and hours?
- Day (d)
- Exactly 86,400 seconds by convention. A solar day runs a few milliseconds long or short, which is what a leap second corrects.
- Hour (h)
- Sixty minutes, and exactly 3,600 seconds.
Source: BIPM SI Brochure — the second, and units accepted for use with the SI
Questions people actually ask
- How many hours are in a day?
- 24. Sixty minutes, and exactly 3,600 seconds.
- How do I convert hours back to days?
- Divide by 24, or multiply by 0.041666667 — they are the same operation.
Other time conversions
Hours to days — the same conversion the other way.