Convert Days to Hours (d to h)
Convert days to hours instantly. 1 d = 24 h. Free days-to-hours converter with table and formula.
Need to turn days (d) into hours (h)? One day equals 24 hours (1 d = 24 h). Enter a value below for an instant, accurate result, or scan the conversion table for common values.
An hour is exactly 3,600 seconds — 1/24 of a day. A civil day is exactly 86,400 seconds (leap seconds aside). Converting between the two is a routine part of durations in scheduling, project planning, and engineering.
86,40086,400,0001,4402410.142857Conversion formula
hours = days × 24Conversion table
| Value | Converted |
|---|---|
| 1 d | 24 h |
| 2 d | 48 h |
| 5 d | 120 h |
| 10 d | 240 h |
| 25 d | 600 h |
| 50 d | 1,200 h |
| 100 d | 2,400 h |
Frequently Asked Questions
How many hours are in a day?
1 d = 24 h. So 10 days equal 240 hours.
How do you convert days to hours manually?
Multiply the number of days by 24: hours = days × 24. For example, 10 d × 24 = 240 h.
Is the days to hours conversion exact?
Yes — both units have exact definitions, so the conversion itself is exact. The factor 24 shown here is rounded for readability; the converter computes with full precision.
Is this days to hours converter free and private?
Yes. It is completely free, requires no signup, and the conversion happens entirely in your browser — no values are sent to any server.
Related conversions
Need a different unit? Use the full Unit Converter for every supported unit and category.