Based on a conversion calculation for weeks to months, there are 8.284931506836 months in 36 weeks. The calculation is based on the measurement for second of time, as defined by the International System of Units, also known as SI.
For a simpler, yet less precise approach to calculating months from weeks, it may be assumed that there are four weeks in a calendar month. Though this would have 28 days for every month, and most have 30 or 31, it will produce a close estimate without complicated equations. For this example, 36 weeks would be divided by 4 (for the weeks in a month), which equals nine months. This number is higher than the actual calculation, so it is not always reliable, and it should be kept in mind that the actual number of months will be lower than the number found with the casual method.