How many hours in a month?
672–744 hours, depending on the month. 730.5 on average.
744
31-day months
Jan, Mar, May, Jul, Aug, Oct, Dec
720
30-day months
Apr, Jun, Sep, Nov
672 / 696
February
28 days / 29 in leap years
Every month, by exact hour count
| Month | Days | Hours | Minutes | Seconds |
|---|---|---|---|---|
| January | 31 | 744 | 44,640 | 2,678,400 |
| February (regular) | 28 | 672 | 40,320 | 2,419,200 |
| February (leap) | 29 | 696 | 41,760 | 2,505,600 |
| March | 31 | 744 | 44,640 | 2,678,400 |
| April | 30 | 720 | 43,200 | 2,592,000 |
| May | 31 | 744 | 44,640 | 2,678,400 |
| June | 30 | 720 | 43,200 | 2,592,000 |
| July | 31 | 744 | 44,640 | 2,678,400 |
| August | 31 | 744 | 44,640 | 2,678,400 |
| September | 30 | 720 | 43,200 | 2,592,000 |
| October | 31 | 744 | 44,640 | 2,678,400 |
| November | 30 | 720 | 43,200 | 2,592,000 |
| December | 31 | 744 | 44,640 | 2,678,400 |
Where the 730.5 average comes from
An "average month" has 365 ÷ 12 = 30.4167 days. Multiply by 24: 30.4167 × 24 = 730 hours, or 730.5 once you account for the leap-year cycle (365.25 ÷ 12 × 24).
Use 730.5 when you need a single number for budgeting, contracts, or conversions that span multiple months. Use the exact per-month figure (above) when the calculation is for a specific calendar month.
See methodology for the underlying definitions.
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Why are months uneven?
The pattern of 30 / 31 / 28 / 29 day months is inherited from the Julian calendar (46 BCE) and preserved by the Gregorian reform (1582). The Gregorian reform changed the leap-year rule but left month lengths alone, so we're still using a 2,000-year-old layout.
The practical consequence: a salaried employee is paid the same in February as in March, but March contains 72 more clock-hours of life. An hourly worker on a fixed schedule earns more in a 31-day month than a 28-day one.
Work hours per month (rule of thumb)
For a 40-hour, 5-day week, an "average" work month is 2,080 ÷ 12 ≈ 173.3 hours (about 21.67 working days). The actual figure for a given calendar month depends on:
- How many weekends fall in the month (4 or 5)
- Federal/regional holidays observed
- Any company-specific shutdown days
For exact monthly work hours including holidays, see the work-year breakdown.
Frequently asked questions
Which month has the most hours?
All 31-day months tie at 744 hours: January, March, May, July, August, October, December.
Which month has the fewest hours?
February. 672 hours in a regular year (28 days), 696 hours in a leap year (29 days).
Should I use 730 or 720 hours per month?
720 (= 30 × 24) is fine for rough mental math. Use 730 (or 730.5) for any calculation that should add up correctly across a full year — 720 × 12 is only 8,640, which falls 120 hours short of an actual year.
Is February ever a leap month?
Yes — every year divisible by 4 (with the exceptions explained on the hours-in-a-year page). Leap February has 29 days = 696 hours.