Convert days to hours
1 day equals 24 hours. Enter a value below to convert instantly.
Need the other direction? Convert hour to day →
Formula
Multiply the number of days by 24 to get hours.
Step by step
- Start with 1 d.
- Multiply by the conversion factor 24.
- 1 × 24 = 24 h.
Days to Hours conversion table
| Days (d) | Hours (h) |
|---|---|
| 1 | 24 |
| 2 | 48 |
| 5 | 120 |
| 10 | 240 |
| 30 | 720 |
| 60 | 1,440 |
| 100 | 2,400 |
| 500 | 12,000 |
| 1,000 | 24,000 |
Convert Day to other time units
1 d expressed in every other time unit on this site.
- Second s 86,400
- Millisecond ms 86,400,000
- Microsecond µs 86,400,000,000
- Nanosecond ns 86,400,000,000,000
- Picosecond ps 8.64e+16
- Femtosecond fs 8.64e+19
- Attosecond as 8.64e+22
- Shake shake 8,640,000,000,000
- Planck Time tP 1.6025977e+48
- Minute min 1,440
- Hour h 24
- Day d 1
- Week wk 0.14285714
- Fortnight fortnight 0.071428571
- Month mo 0.032854884
- Quarter qtr 0.010951628
- Year yr 0.002737907
- Decade decade 0.0002737907
- Century century 0.00002737907
- Millennium millennium 0.000002737907
- Day (sidereal) d (sid) 1.0027379
- Hour (sidereal) h (sid) 24.06571
- Minute (sidereal) min (sid) 1,443.9426
- Second (sidereal) s (sid) 86,636.556
- Week (Julian) wk (Jul) 0.14285714
- Month (synodic) mo (syn) 0.033863179
- Year (Julian) yr (Jul) 0.0027378508
- Year (leap) yr (leap) 0.0027322404
- Year (tropical) yr (trop) 0.0027379089
- Year (sidereal) yr (sid) 0.0027378031
- Year (common) yr (365d) 0.002739726
- Quinquennial 5 yr 0.00054794521
- Septennial 7 yr 0.00039138943
- Octennial 8 yr 0.00034246575
- Novennial 9 yr 0.000304414
- Quindecennial 15 yr 0.0001826484
About the day
The day (d) is a Other unit of time.
About the hour
The hour (h) is a Other unit of time.
Where this conversion is used
Converting days to hours comes up when scheduling, timers, project planning, and physics. Month and year use average calendar lengths, so they are approximate for any specific date range.
Related conversions
Frequently asked questions
How many hours are in a day?
One day equals 24 hours.
How do you convert days to hours?
Multiply the number of days by 24 to get hours.
What is 1 hour in days?
One hour equals 0.041666667 days.
When would I convert days to hours?
This conversion is common when scheduling, timers, project planning, and physics.
Conversion factors are based on internationally agreed unit definitions. See our methodology and sources for details on how these values are verified.