Convert Days to Hours
1 Day (d) = 24 Hours (hr). Use the free converter below to instantly convert any day value to hours, or view the full conversion table and formula.
1 d = 24 hr
Day to Hour Conversion Table
How to Convert Days to Hours
To convert days to hours, multiply by 24. For example, 3.5 days × 24 = 84 hours. This works because there are exactly 24 hours in one day.
Worked Example: Convert 5 d to hr
Start with the value in days
5 d
Apply the formula
hr = 5 × 24
Calculate the result
5 d = 120 hr
Day to Hour Examples
1 d is equal to 24 hr. Using the formula d × 24, 1 d converts to 24 hr.
2 d is equal to 48 hr. Using the formula d × 24, 2 d converts to 48 hr.
3 d is equal to 72 hr. Using the formula d × 24, 3 d converts to 72 hr.
5 d is equal to 120 hr. Using the formula d × 24, 5 d converts to 120 hr.
7 d is equal to 168 hr. Using the formula d × 24, 7 d converts to 168 hr.
10 d is equal to 240 hr. Using the formula d × 24, 10 d converts to 240 hr.
14 d is equal to 336 hr. Using the formula d × 24, 14 d converts to 336 hr.
21 d is equal to 504 hr. Using the formula d × 24, 21 d converts to 504 hr.
Converting Hours to Days
Need the reverse conversion? Use the table below for a quick reference converting hours back to days.
| Hours (hr) | Days (d) |
|---|---|
| 0.25 | 0.0104 |
| 0.5 | 0.0208 |
| 1 | 0.0417 |
| 2 | 0.0833 |
| 3 | 0.125 |
| 4 | 0.1667 |
Days to Hours FAQ
How many hours is 1 day?
1 day equals exactly 24 hours.
How do I convert days to hours?
Multiply the number of days by 24. For example, 5 days × 24 = 120 hours.
How many hours is 30 days?
30 days equals 720 hours (30 × 24 = 720).
Understanding Days and Hours
What is a Day (d)?
The day (d) is a universally used unit of time. It is commonly abbreviated as d and relates to hours by a factor of 24.
What is a Hour (hr)?
The hour (hr) is a universally used unit of time. It is commonly abbreviated as hr and relates to days by a factor of 0.041667.