Weeks to Months

Exact Weeks to Months Conversion

Please, enter a positive number of weeks and press "Calculate" to convert it to the number of months.


Check also our Remaining / elapsed weeks calculator

Predefined list of weeks to months conversions

Pregnant women often wonder what number of months corresponds to the given number of weeks. Below you can see a list of conversions from week to month number. If the interesting number of weeks is not present you can simply use the calculator above.

  • 8 weeks is 1 and 3/4 (three quarters) month
  • 9 weeks is 2 months
  • 10 weeks is 2 and 1/4 (quarter) months
  • 11 weeks is 2 and 1/2 (half) months
  • 12 weeks is 2 and 3/4 (three quarters) months
  • 13 weeks is 3 months
  • 14 weeks is 3 and 1/4 (quarter) months
  • 15 weeks is 3 and 1/2 (half) months
  • 16 weeks is 3 and 3/4 (three quarters) months
  • 17 weeks is 4 months
  • 18 weeks is 4 and 1/4 (quarter) months
  • 19 weeks is 4 and 1/4 (quarter) months
  • 20 weeks is 4 and 1/2 (half) months
  • 21 weeks is 4 and 3/4 (three quarters) months
  • 22 weeks is 5 months
  • 23 weeks is 5 and 1/4 (quarter) months
  • 24 weeks is 5 and 1/2 (half) months
  • 25 weeks is 5 and 3/4 (three quarters) months
  • 26 weeks is 6 months
  • 27 weeks is 6 and 1/4 (quarter) months
  • 28 weeks is 6 and 1/2 (half) months
  • 29 weeks is 6 and 3/4 (three quarters) months
  • 30 weeks is 7 months
  • 31 weeks is 7 and 1/4 (quarter) months
  • 32 weeks is 7 and 1/4 (quarter) months
  • 33 weeks is 7 and 1/2 (half) months
  • 34 weeks is 7 and 3/4 (three quarters) months
  • 35 weeks is 8 months
  • 36 weeks is 8 and 1/4 (quarter) months
  • 37 weeks is 8 and 1/2 (half) months
  • 38 weeks is 8 and 3/4 (three quarters) months
  • 39 weeks is 9 months
  • 40 weeks is 9 and 1/4 (quarter) months

How to convert weeks to months?

The number of weeks in an average Gregorian year equals to approximately 52.18 weeks (365.25 days divided by 7), and the number of weeks in average month is close to 4.35. Hence, when performing weeks to months calculations it is not sufficient to simply assume that a month equals to four weeks, i.e. 4 x 7 = 28. Except February in a non-leap year, every other month is one to three days longer and this difference has to be taken into account. For example, 24 weeks equals to exactly 5 and a half months, not to 6 (24 / 4 = 6).