This converter changes months into weeks and back again. Because a calendar month has no fixed number of weeks, it uses the long-term average month so results are consistent and reproducible.
How it works
The tool uses the average Gregorian month: a year of 365.2425 days divided by 12 gives 30.436875 days per month, and dividing by 7 gives the weekly figure:
- weeks = months × 4.348125
- months = weeks ÷ 4.348125
Press Swap to reverse the direction. Since real months range from 28 to 31 days, treat the result as an accurate average rather than an exact count for a specific calendar month.
Example
A 6-month project timeline in weeks:
6 × 4.348125 = 26.09 weeks, so roughly 26 weeks.
| Months | Weeks (approx.) |
|---|---|
| 1 | 4.35 |
| 3 | 13.04 |
| 6 | 26.09 |
| 9 | 39.13 |
| 12 | 52.18 |
Everything is calculated locally in your browser.