Convert days, months. Sometimes we may want to convert a figure in days to months. To do this, we can average the number of days in a month.

Solution info. In solving this problem we use an averaged number. The solution is not ideal for known date ranges—it just provides an estimate.

Example. The average month has 30.44 days in it. Then, to convert an integer of days to a double of months, you can divide by this constant. We show that 200 days is equal to 6.57 months.

using System;

class Program
{
    static void Main()
    {
        int days = 200;
        // Divide by this constant to convert days to months.
        const double daysToMonths = 30.4368499;
        {
            double months = days / daysToMonths;
            Console.WriteLine("{0} days = {1:0.00} months", days, months);
        }
    }
}
200 days = 6.57 months

Some notes. This code converts days to months in an abstract way. It is not influenced by what months were covered. If you have a known period of days, this computation is not ideal.

Summary. We described the usage of a constant double to convert days to months. This conversion is not always useful. But it can be correctly used in a general sense.