Convert months to days
Converting months to days is a common time task, whether you are checking a recipe, a spec sheet, a travel distance or a homework problem. Since 1 mo equals 30.4369 d, the math is a single multiplication — and this page does it for you instantly, with the formula, a table of common values and answers to the questions people ask most.
Exact factor
How to convert months to days
To convert months to days, multiply the number of months by 30.4369. For example, 10 mo × 30.4369 = 304.369 d.
d = mo × 30.4369
- Write down the value in months you want to convert.
- Multiply it by 30.4369 (the exact mo→d factor).
- The result is your value in days. Check it below with the converter or the table.
Conversion table
Common values of months and their equivalents in days:
| mo | d |
|---|---|
| 1 | 30.4369 |
| 2 | 60.8738 |
| 3 | 91.3106 |
| 4 | 121.748 |
| 5 | 152.184 |
| 10 | 304.369 |
| 20 | 608.738 |
| 25 | 760.922 |
| 50 | 1,521.84 |
| 100 | 3,043.69 |
| 250 | 7,609.22 |
| 500 | 15,218.4 |
About these units
Month (mo). A month is the approximate period of the Moon's orbit, but calendar months vary from 28 to 31 days. For conversions this tool uses the Gregorian average of 30.436875 days.
Day (d). A day equals 24 hours or 86,400 seconds, approximating one rotation of the Earth. Calendars, deadlines and project plans are built on days.
Frequently asked questions
How do I convert months to days?
To convert months to days, multiply the number of months by 30.4369. For example, 10 mo × 30.4369 = 304.369 d. Or skip the math: type the value into the converter at the top of this page and the result updates instantly.
How many days are in 1 month?
1 mo = 30.4369 d. That is the fixed relationship used by this converter and by international standards.
How many months are in 1 day?
1 d = 0.0328549 mo. If you are converting in the opposite direction, use our Day to Month converter for the dedicated table and FAQ.
Is the months to days conversion exact?
Yes. Both units are defined by international agreement, so the factor of 30.4369 is exact. Displayed results are rounded to 6 significant digits only for readability.
What is month used for?
A month is the approximate period of the Moon's orbit, but calendar months vary from 28 to 31 days. For conversions this tool uses the Gregorian average of 30.436875 days.