Time Conversion: 1 day = 24 hours | Essential for duration calculations
Accurate conversion between hours and days for time durations, schedules, and planning.
Conversion Factor
1 day = 24 hours (h) | 1 hour = 1/24 days ≈ 0.0416667 days
Precision: 2 Decimal Places | Formula: d = h ÷ 24
Understanding these fundamental units for measuring time durations.
Hour to Day Conversion
1 day = 24 hours (h)
1 hour = 1/24 days ≈ 0.0416667 days
Days = Hours ÷ 24
Hours = Days × 24
Convert 72 hours to days:
d = h ÷ 24
d = 72 ÷ 24
d = 3 (with 0 decimal places)
Convert 2.5 days to hours:
h = d × 24
h = 2.5 × 24
h = 60 (with 0 decimal places)
Note: Based on the standard 24-hour day
A unit of time equal to 60 minutes, or 3,600 seconds. One of the most commonly used units for measuring shorter durations.
Equivalents:
Note: Based on the Earth's rotation period
A unit of time representing the period of one rotation of the Earth on its axis, equal to 24 hours.
Equivalents:
Note: The actual solar day varies slightly throughout the year
| Years | Weeks | Days | Hours | Minutes |
|---|---|---|---|---|
| 1 yr | 52.143 wk | 365 d | 8760 h | 525600 min |
| 0.0192 yr | 1 wk | 7 d | 168 h | 10080 min |
| 0.00274 yr | 0.1429 wk | 1 d | 24 h | 1440 min |
| 3.17e-5 yr | 0.00595 wk | 0.0417 d | 1 h | 60 min |
| 5.25e-7 yr | 9.92e-5 wk | 6.94e-4 d | 0.0167 h | 1 min |
Common questions about hours, days, and time measurements.
A standard day consists of 24 hours. This is based on the average time it takes for the Earth to complete one full rotation on its axis relative to the Sun, known as a solar day.
1 day = 24 hours
1 hour = 1/24 days ≈ 0.0416667 days
Days to Hours: h = d × 24
Hours to Days: d = h ÷ 24
This 24-hour system is used globally as the standard time measurement, though some cultures historically used different systems (like the 12-hour clock with AM/PM designations).
Precision in time conversions varies by application but can be critical in many scenarios:
This converter allows you to select 0-5 decimal places to match your specific precision requirements. For example, tracking billable hours often requires at least 2 decimal places for accuracy.
While our converter uses the standard 24-hour day, real-world timekeeping has some variations:
Occasionally, a leap second is added to Coordinated Universal Time (UTC) to keep it in sync with Earth's rotation, which is gradually slowing down. This makes a day very slightly longer than 24 hours (86,401 seconds instead of 86,400).
These adjustments are rare (about 27 times since 1972) and generally not accounted for in everyday time conversions.
In regions that observe daylight saving time, clocks are adjusted by one hour twice a year. This creates one 23-hour day and one 25-hour day per year in those regions.
These are human adjustments to clock time, not changes to the actual length of a day based on Earth's rotation.
For most practical purposes including scheduling, billing, and planning, the standard 24-hour day conversion remains appropriate.
Hours and days are versatile units used across many domains:
In all these contexts, converting between hours and days helps in planning, communicating timeframes, and ensuring accurate scheduling.
There are two scientific definitions of a "day," based on different astronomical references:
The time it takes for the Earth to rotate once relative to the Sun, which is approximately 24 hours.
The time it takes for the Earth to complete one full rotation relative to the stars.
Our converter uses the standard 24-hour solar day, which is the basis for civil timekeeping worldwide. The difference arises because the Earth also moves in its orbit around the Sun, requiring a little extra rotation to bring the Sun back to the same position in the sky.
Common time durations for scheduling, work, and everyday use.
| Hours | Days | Minutes | Weeks | Common Uses |
|---|---|---|---|---|
| 1 h | 0.0417 d | 60 min | 0.00595 wk | Short meeting, workout |
| 3 h | 0.125 d | 180 min | 0.0179 wk | Movie, long meeting |
| 8 h | 0.333 d | 480 min | 0.0476 wk | Work shift, sleep |
| 12 h | 0.5 d | 720 min | 0.0714 wk | Half a day, long trip |
| 24 h | 1 d | 1440 min | 0.1429 wk | One full day |
| 48 h | 2 d | 2880 min | 0.2857 wk | Weekend, short vacation |
| 72 h | 3 d | 4320 min | 0.4286 wk | Long weekend, holiday |
| 168 h | 7 d | 10080 min | 1 wk | One week |
| 720 h | 30 d | 43200 min | 4.2857 wk | Average month |
| 8760 h | 365 d | 525600 min | 52.143 wk | One year |
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Accurate conversion between hours and days for time measurements. Supports adjustable precision and conversion history.
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