Months To Days Conversion (mo To Day) - Inch Calculator

On this page:

Show/hide table of contents Chevron Down Icon

• Months to Days Converter
• How to Convert Months to Days
• How Many Days in a Month?
• What Is a Month?
• What Is a Day?
• Month to Day Conversion Table

Person Icon By Joe Sexton

Joe is the creator of Inch Calculator and has over 20 years of experience in engineering and construction. He holds several degrees and certifications.

Full bioChevron Right Icon Link Icon Copy Link Facebook Icon Share on Facebook X Icon Share on X Pinterest Icon Share on Pinterest Cite Icon Cite ×Close dialog

Cite This Page

Sexton, J. (n.d.). Months to Days Converter. Inch Calculator. Retrieved December 18, 2025, from https://www.inchcalculator.com/convert/month-to-day/

How to Convert Months to Days

To convert months to days, multiply the time in months by the conversion factor.

On average, one month is equal to 30.436875 days, so you can use this formula to convert:

days = months × 30.436875

The time in days is equal to the number of months multiplied by 30.436875.

For example, here's how to convert 3 months to days using the formula above.

days = (5 mo × 30.436875) = 152.184375 days

It's important to keep in mind that each month has a different number of days. That means that to precisely convert months to days, you'll need to know which months you're working with.

How Many Days in a Month?

While there are an average of 30.436875 days in a month, each month has a different number of days.

The table below shows how many days are in each month of the year.

Table showing the number of days in each month of the year.

Month	Number of Days
January	31 days
February	28 days (29 on leap years)
March	31 days
April	30 days
May	31 days
June	30 days
July	31 days
August	31 days
September	30 days
October	31 days
November	30 days
December	31 days

Months and days are both units used to measure time. Keep reading to learn more about each unit of measure.

What Is a Month?

One month is a unit of time equal to 1/12 of a year. The month is a unit of time used most commonly in relation to the calendar, and ranges in length from 28 to 31 days.

Months can be abbreviated as mo (plural mos), and are also sometimes abbreviated as mth. For example, 1 month can be written as 1 mo or 1 mth, and 2 months can be written as 2 mos.

Learn more about months.

What Is a Day?

One day is the time it takes for the Earth to complete a single 360-degree rotation about its axis. There are 24 hours in a day.

The day is an SI accepted unit for time for use with the metric system. Days can be abbreviated as d; for example, 1 day can be written as 1 d.

Learn more about days.

Month to Day Conversion Table

Table showing various month measurements converted to days.

Months	Days
1 mo	30.44 d
2 mo	60.87 d
3 mo	91.31 d
4 mo	121.75 d
5 mo	152.18 d
6 mo	182.62 d
7 mo	213.06 d
8 mo	243.5 d
9 mo	273.93 d
10 mo	304.37 d
11 mo	334.81 d
12 mo	365.24 d
13 mo	395.68 d
14 mo	426.12 d
15 mo	456.55 d
16 mo	486.99 d
17 mo	517.43 d
18 mo	547.86 d
19 mo	578.3 d
20 mo	608.74 d
21 mo	639.17 d
22 mo	669.61 d
23 mo	700.05 d
24 mo	730.49 d
25 mo	760.92 d
26 mo	791.36 d
27 mo	821.8 d
28 mo	852.23 d
29 mo	882.67 d
30 mo	913.11 d
31 mo	943.54 d
32 mo	973.98 d
33 mo	1,004 d
34 mo	1,035 d
35 mo	1,065 d
36 mo	1,096 d
37 mo	1,126 d
38 mo	1,157 d
39 mo	1,187 d
40 mo	1,217 d

More Month & Day Conversions

Calendar IconConvert from Months

• months to centuriesChevron Right Icon
• months to decadesChevron Right Icon
• months to yearsChevron Right Icon
• months to weeksChevron Right Icon
• months to hoursChevron Right Icon
• months to minutesChevron Right Icon
• months to secondsChevron Right Icon
• months to millisecondsChevron Right Icon
• months to microsecondsChevron Right Icon
• months to nanosecondsChevron Right Icon

Calendar IconConvert to Days

• centuries to daysChevron Right Icon
• decades to daysChevron Right Icon
• years to daysChevron Right Icon
• weeks to daysChevron Right Icon
• hours to daysChevron Right Icon
• minutes to daysChevron Right Icon
• seconds to daysChevron Right Icon
• milliseconds to daysChevron Right Icon
• microseconds to daysChevron Right Icon
• nanoseconds to daysChevron Right Icon