How many days is 1 month?
30.44 days
1 month = 30.44 days — 30 days 10 hours 29 minutes 6 seconds on a clock.
days
30.4369d
1 mo = 30.4369 d
Months and years have no fixed length, so this uses the Gregorian average — 365.2425 days a year, 30.436875 days a month. For a span between two real dates, use the date difference calculator.
Quick pairs
How 1 month converts to days
Every time conversion goes through the second, which is the SI base unit for time. 1 month is 2,629,746 seconds, and dividing that by the length of one day gives the answer.
1 month = 30.44 days 1 × 30.44 = 30.44
Written as a clock reading rather than a decimal, that is 30 days 10 hours 29 minutes 6 seconds. The decimal form is what a form field or a spreadsheet wants; the clock form is what a schedule wants, and the two are not interchangeable.
Where 1 month shows up
Thirty point four four is an average, and no real month is that long. Actual months run 28, 29, 30 or 31 days, and the average of 30.436875, a twelfth of the Gregorian year, exists so that rents and rates can be prorated consistently. Use it for pricing and forecasting; do not use it to work out a date. One month from January 31 is a question the average cannot answer, and different systems answer it differently. Real dates belong in /date/date-difference-calculator.
1 month in every time unit
The same span, converted once into each unit the tool supports. The last two rows use the Gregorian average.
| Unit | Amount | Basis |
|---|---|---|
| milliseconds | 2,629,746,000 | Exact definition |
| seconds | 2,629,746 | Exact definition |
| minutes | 43,829 | Exact definition |
| hours | 730.5 | Exact definition |
| days | 30.44 | Exact definition |
| weeks | 4.348 | Exact definition |
| months | 1 | Gregorian average |
| years | 0.08333 | Gregorian average |
Frequently asked questions
How many days is 1 month?
1 month = 30.44 days. 1 month = 30.44 days, so the conversion is 1 × 30.44 = 30.44. Because the calculation involves a month or a year, it uses the Gregorian average rather than a real calendar span, so treat it as an estimate.
How long is 1 month on a clock?
30 days 10 hours 29 minutes 6 seconds. That is the same span written out in whole units instead of a decimal, which is usually what you want when you are setting a timer or reading a schedule rather than filling in a form.
Why is this an estimate rather than an exact answer?
Months are 28 to 31 days and years are 365 or 366, so neither has a single fixed length. This page uses the Gregorian average — 365.2425 days a year, which is a twelfth of that, or 30.436875 days, a month. For a span between two real calendar dates, use the date difference calculator instead; it counts the actual days.
What is 1 month in practice?
Thirty point four four is an average, and no real month is that long. Actual months run 28, 29, 30 or 31 days, and the average of 30.436875, a twelfth of the Gregorian year, exists so that rents and rates can be prorated consistently. Use it for pricing and forecasting; do not use it to work out a date. One month from January 31 is a question the average cannot answer, and different systems answer it differently. Real dates belong in /date/date-difference-calculator.
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