Time conversion
Day to Hour
One day is 24 hours. Enter any value below to convert it instantly, or use the reference table further down for the numbers you need most often.
Conversion rate
1 d = 24 h
h = d × 24
1 d = 24 h
Reference
Day to Hour table
The values people look up most often, rounded for practical use.
| Day (d) | Hour (h) | Written out |
|---|---|---|
| 1 d | 24 h | 1 days = 24 hours |
| 2 d | 48 h | 2 days = 48 hours |
| 3 d | 72 h | 3 days = 72 hours |
| 5 d | 120 h | 5 days = 120 hours |
| 10 d | 240 h | 10 days = 240 hours |
| 15 d | 360 h | 15 days = 360 hours |
| 20 d | 480 h | 20 days = 480 hours |
| 25 d | 600 h | 25 days = 600 hours |
| 50 d | 1,200 h | 50 days = 1,200 hours |
| 100 d | 2,400 h | 100 days = 2,400 hours |
| 250 d | 6,000 h | 250 days = 6,000 hours |
| 500 d | 12,000 h | 500 days = 12,000 hours |
| 1,000 d | 24,000 h | 1,000 days = 24,000 hours |
How to convert days to hours
Multiply the number of days by 24. That is the whole calculation: h = d × 24. To go back the other way, divide instead, or multiply by 0.041667.
Worked example: 12 days × 24 = 288 hours.
Where this conversion comes up
Time conversions are exact up to weeks. Months and years are not, a month here is treated as 30 days and a year as 365, which is fine for rough planning but wrong for contracts. For calendar-accurate durations use the date calculator, which counts real months and leap years.
Quick answers
- 1 day = 24 hours
- 2 days = 48 hours
- 5 days = 120 hours
- 10 days = 240 hours
- 100 days = 2,400 hours
More conversions
Other time conversions
Answers
Frequently asked questions
h = d × 24. The converter above applies it for you, but the formula is useful in a spreadsheet, put your value in column A and the formula in column B.Related tools
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