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# Weeks to months

This online calculator converts given number of weeks to approximate number of months and days in the month

• 17 weeks in months?
• how much is 13 weeks in months?
• how long is 10 weeks in months?
• what is 28 weeks in months?
• 16 weeks is how many months?

As you can see, there are many ways to ask, but essentially it is all about converting weeks to months. I think this is what pregnant women often look for. Conversion is based on averages, so, it may slip a day or several days in case of February, etc. but I think averages are good enough for most people. For those who interested, details of calculation and why it can slip a day explained below the calculator. Months

### Weeks in months

Speaking of averages, the calculator considers a month to be 365/12=30,416667 days long.

Let's calculate 5 weeks interval using this value. 5 weeks is 35 days. 35 days is 30,416667 + 4,58333, which is 1 month and 4 days, if we take closest integer number below 4,58333.
Now let's compare this result to real life cases:

• If we start counting from 1st of January, 35 days is indeed 1 month 4 days
• If we start counting from 1st of February, 35 days is 1 month 7 days (for leap year it is 1 month 6 days)
• If we start counting from 1st of April, 35 days is 1 month 5 days.

So, in some cases it can slip a day because of 30/31 days in month, and more if February is involved. But if we talk about pregnancy, probably, it doesn't matter.

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