Days to Hours Converter
1 day = 24 hours
The calendar day is exactly 86,400 s here. Actual solar days vary by milliseconds, and leap seconds have occasionally been added to civil time.
1 day equals 24 hours
How to convert days to hours
A day here is a duration of 86,400 seconds. Unless explicitly labeled Julian, months and years use the mean Gregorian convention (365.2425 days per year; one twelfth per month), rather than the actual length of a particular calendar interval.
h = d × 24One day is 24 hours, so a single multiplication converts any value.
240 h = 10 × 24The calendar day is exactly 86,400 s here. Actual solar days vary by milliseconds, and leap seconds have occasionally been added to civil time.
Days to hours conversion table
Common values in days, converted to hours.
| Days (d) | Hours (h) |
|---|---|
| 1 | 24 |
| 2 | 48 |
| 5 | 120 |
| 10 | 240 |
| 15 | 360 |
| 30 | 720 |
| 60 | 1,440 |
| 90 | 2,160 |
| 120 | 2,880 |
About these units
dayd
Exactly 24 hours, or 86,400 seconds.
hourh
Exactly 60 minutes, or 3,600 seconds.
Sources and precision
Table results are rounded to 8 significant digits; formula constants may be rounded to 10. Worked example answers use 6 significant digits. The converter starts at 6 significant digits and lets you change display precision. Calculations use the stored factors without intermediate rounding. Exact unit definitions do not make an input measurement more precise; conventional and measured factors follow the assumptions stated here.