In 1 months there are 4.285714 weeks. Meanwhile in 1 weeks there are 0.233333 months. Keep reading to learn more about each unit of measure and how they are calculated. Or just use the Weeks to Months calculator above to convert any number.
* Values rounded to 6 decimal places for readability
To convert months to weeks, use an average weeks-per-month value.
Examples
Tip: This is an average based on a year length. Real months vary, so results won’t always match exact calendar weeks.
Most months have about 4.3 weeks. That’s because a month isn’t a fixed number of days, but a week always has 7 days.
No. Four weeks equals 28 days, and every month has more than 28 days. Even February has 28 days (29 in leap years).
A year has 52 weeks plus 1 extra day (2 in a leap year). Since there are 12 months in a year, each month averages a little over 4 weeks. The average comes out to about 4.345 weeks per month.
Multiply the number of months by the average weeks per month. A common average is 4.345 weeks per month. This works well for planning across many months.
On average, 1 month is about 4.345 weeks. If you mean a specific month, use its day count:
On average, 2 months is about 8.69 weeks (2 × 4.345). The exact number changes if you count two specific calendar months.
On average, 3 months is about 13.04 weeks (3 × 4.345). For exact results, add the days in the three months and divide by 7.
On average, 6 months is about 26.07 weeks. That’s close to half a year, but calendar months still vary in length.
On average, 12 months is about 52.14 weeks. A standard year has 52 weeks and 1 extra day, so it’s not exactly 52 weeks.
A 30-day month has 4.286 weeks (30 ÷ 7). That’s 4 weeks and 2 days.
A 31-day month has 4.429 weeks (31 ÷ 7). That’s 4 weeks and 3 days.
February has:
Four weeks is always 28 days. One month can be 28, 29, 30, or 31 days. This is why “monthly” and “every 4 weeks” don’t stay aligned on a calendar.
No full month is only 4 weeks long. February in a common year is 4 weeks plus 0 extra days beyond 28, but it’s still a calendar month, not a fixed 4-week block.
Use the average (4.345 weeks per month) for long-term plans like budgets or timelines. Use exact day counts when the dates matter, like pay periods, contracts, or due dates.
The month length stays the same, except February changes in leap years. What shifts is how a month lines up on the calendar, since years have extra days beyond 52 full weeks.
Divide weeks by 4.345 to get an average month estimate. If you need exact calendar months, you’ll need start and end dates since months don’t have a fixed week length.
It’s a simple shortcut. It works for rough estimates, but it undercounts time when used for totals across several months.
On average, 1.5 months is about 6.52 weeks (1.5 × 4.345). If you mean 45 days, that equals 6.43 weeks (45 ÷ 7).
The Calculate Box tool to convert months to weeks 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 weeks.