Days to Hours Converter
Multiply days by 24 to get hours.
Formula
1 d = 24 h
hours = days × 24
Worked example
Convert 3.5 days to hours
- Multiply by 24
- 3.5 × 24 = 84
3.5 d = 84 h
Good to know
3.5 days is 84 hours. Calendar days around a daylight-saving change can be 23 or 25 hours long in local time, so for exact elapsed time across such a change, count clock hours rather than days.
Conversion table
| Days (d) | Hours (h) |
|---|---|
| 0.25 | 6 |
| 0.5 | 12 |
| 1 | 24 |
| 1.5 | 36 |
| 2 | 48 |
| 3 | 72 |
| 3.5 | 84 |
| 5 | 120 |
| 7 | 168 |
| 10 | 240 |
| 14 | 336 |
| 30 | 720 |
| 365 | 8,760 |
About these units
- Day (d)
- 24 hours, or 86,400 seconds (calendar days around daylight-saving changes can be 23 or 25 hours long).
- Hour (h)
- 60 minutes, or 3,600 seconds.