Days to Hours Converter
Type a value in days to see it in hours as you type, with the exact formula and a reference chart.
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How this was calculated
- 1 day = 24 hours
- 30 × 24 = 720 h
| days | h |
|---|---|
| 0.5 days | 12 h |
| 1 day | 24 h |
| 1.5 days | 36 h |
| 2 days | 48 h |
| 2.5 days | 60 h |
| 3 days | 72 h |
| 4 days | 96 h |
| 5 days | 120 h |
| 6 days | 144 h |
| 7 days | 168 h |
| 10 days | 240 h |
| 14 days | 336 h |
| 15 days | 360 h |
| 20 days | 480 h |
| 21 days | 504 h |
| 30 days | 720 h |
| 31 days | 744 h |
| 45 days | 1,080 h |
| 60 days | 1,440 h |
| 90 days | 2,160 h |
| 100 days | 2,400 h |
| 180 days | 4,320 h |
| 365 days | 8,760 h |
| h | days |
|---|---|
| 1 h | 0.0416667 days |
| 6 h | 0.25 days |
| 8 h | 0.333333 days |
| 10 h | 0.416667 days |
| 12 h | 0.5 days |
| 18 h | 0.75 days |
| 24 h | 1 day |
| 30 h | 1.25 days |
| 36 h | 1.5 days |
| 40 h | 1.66667 days |
| 48 h | 2 days |
| 50 h | 2.08333 days |
How to convert days to hours
1 day = 24 hours. To convert days to hours, multiply by 24. A day is 24 hours, 86,400 seconds. An hour is 60 minutes, 3,600 seconds.
Worked examples
- 3 days = 72 h (3 × 24)
- 30 days = 720 h (30 × 24)
- 365 days = 8,760 h (365 × 24)
Where this conversion comes up
Days are used for deadlines, trips, leave and age calculations; hours for work schedules, payroll, flights and battery life. For shift totals, rental periods and countdowns. A day is 24 hours, so a 30-day month has 720 h and a year has 8,760 h.
Quick estimate
Multiply by 24, or by 25 and subtract 4%.
Common mistakes
- Dividing instead of multiplying. A hour is smaller than a day, so the number of hours must come out larger: 3 days = 72 h.
- Reading the remainder as a decimal. 1 h 30 min is 1.5 h, not 1.3 h: divide the leftover minutes by 60 (or seconds by 60) to get the decimal part.
Going the other way? Use the hours to days converter. Related time converters: minutes to hours, hours to minutes, seconds to minutes, minutes to seconds, seconds to hours, hours to seconds.
Frequently asked questions
How do you convert days to hours?
Multiply the days by 24. For example, 30 days is 720 hours.
How many hours are in one day?
One day is 24 hours. A day is 24 hours, 86,400 seconds.
What is 365 days in hours?
365 days is 8,760 hours.
Is there a quick way to estimate days to hours?
Multiply by 24, or by 25 and subtract 4%.