In 1 months there are 30 days. Meanwhile in 1 days there are 0.033333 months. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Days to Months calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert months to days, you need a clear rule for what a “month” means.
For a quick estimate, use 30 days per month:
days = months × 30
For a more accurate average, use the average month length based on the calendar year: 30.436875 days per month:
days = months × 30.436875
For exact calendar results, use the real month length (since months vary):
January, March, May, July, August, October, December = 31 days
April, June, September, November = 30 days
February = 28 days (29 in a leap year)
If you need one number for most months to days conversions, the average month (30.436875 days) is the best all-purpose choice.
A month can have 28, 29, 30, or 31 days. Most months have 30 or 31 days. February is the only month with 28 days in a common year and 29 days in a leap year.
The calendar was shaped by old timekeeping systems and later adjusted to fit the solar year. The result is a mix of 30- and 31-day months, with February set shorter. Leap years add one day to keep the calendar in step with the Earth’s orbit.
It depends on which month you mean. If you need a quick estimate, many people use 30 days as an average month length. For exact results, use the actual month and year.
Two months can be 59 to 62 days, depending on the months and whether February is included. For example, January plus February is 59 days in most years and 60 days in a leap year. July plus August is 62 days.
Three months can range from 89 to 92 days. The exact number depends on which months you count and whether a leap day falls in that span. Always add the day counts for the specific months to get an exact total.
Six months usually fall between 181 and 184 days. The exact total changes based on which half of the year you mean and whether February is included. Add each month’s days for a precise answer.
Twelve months is one calendar year. That is 365 days in a common year and 366 days in a leap year. Leap years happen to keep the calendar aligned with the seasons.
Most months don’t change in a leap year. Only February changes, going from 28 days to 29 days. All other months keep their normal length.
The average month length across a year is about 30.42 days. This comes from 365 days divided by 12 months. In a leap year, the average is about 30.50 days (366 divided by 12).
No. Some months have 31 days, some have 30, and February has 28 or 29. Using 30 days for one month is only an estimate, not an exact rule.
Pick the start month and the year, then add the days in each month you’re counting. If the time period crosses February, check if it’s a leap year. Exact conversion needs real calendar months, not averages.
Use 30 days per month for a simple estimate. For a closer estimate, use 30.42 days per month. Estimates work well for rough planning, but not for due dates or legal time limits.
It depends on the contract, policy, or local rules. Some billing cycles use calendar months, which vary in length. Others define a month as 30 days. Read the exact wording to avoid mistakes.
Many people use weeks for pregnancy and days for short time spans. If you use months, the exact days depend on the calendar months involved. For accurate tracking, use real dates and count the days between them.
Yes. A 1-month span from January 15 to February 15 is 31 days in most years. A 1-month span from April 15 to May 15 is 30 days. The same “one month” can mean different day counts based on the dates.
The Calculate Box tool to convert months to days uses the open source script Convert.js to convert units of measurement. To use this tool, simply type a months value in the box and have it instantly converted to days.