That Annoying Week Count Problem
So my wife mentioned yesterday that our nephew is “28 weeks old.” It hit me – that sounds way longer than saying he’s about 6 months. Made me wonder, what’s the real deal with converting months to weeks? Like, for planning stuff, baby stuff, work stuff… seems basic, right? But man, it gets messy fast. Just try asking Google “how many weeks in 7 months?” and see the chaos.

Grabbing Tools & Getting Stuck
I grabbed my notebook, laptop, and a physical calendar – old school, I know. Needed to see this on paper. First thought: “Okay, a month must be about 4 weeks, yeah?” So, 7 months times 4 weeks? That’s 28 weeks. Easy math. Started feeling smug.
Then I actually looked at the calendar. Glanced at my nephew’s birthday: April 10th. Counted forward 7 months later – landed on November 10th. Now I had to figure the weeks between April 10 and Nov 10.
Started counting days:April 10 to May 10 is 30 days? No! April has 30 days, but April 10 to May 10 is exactly 30 days? Hold on… Had to stop. This is why people get confused. Broke it down:
- April 10 to May 10: 30 days (since April has 30 days)
- May 10 to June 10: 31 days (May has 31)
- June 10 to July 10: 30 days (June 30 days)
- July 10 to August 10: 31 days
- August 10 to Sept 10: 31 days
- Sept 10 to Oct 10: 30 days
- Oct 10 to Nov 10: 31 days? Wait, October has 31 days, so Oct 10 to Nov 10 is 31 days…
Total days = 30 + 31 + 30 + 31 + 31 + 30 + 31 = 214 days. Divided by 7? It’s roughly 30.57 weeks. That’s way more than 28! What the—? Why the big difference?
Getting Real About Months
Felt like I hit a wall. My “4 weeks per month” idea just crashed. Months aren’t all 4 weeks. Heck, most are longer! Only February is exactly 4 weeks… sometimes. Stuff like leap years? Forget about it. Those extra days pile up.
I realized online calculators aren’t wrong – they’re calculating the actual days between two dates. But if someone just asks “weeks in 7 months,” they probably want a rough guide, right? Not everyone cares about exact birth dates. So what’s the practical answer?
What Works for Real Life
Threw my hands up a bit. Here’s what makes sense now:
- The Simple Math (Averages): Most months are about 4.345 weeks long. Multiply that by 7? That’s right around 30.415 weeks. Close to the 30.57 I got counting days. So, if you’re just ballparking stuff like project deadlines? Saying “roughly 30 weeks” is a lot more honest than 28.
- The Precise Way (Actual Dates): If you actually need to know exactly, like for baby milestones? Gotta know the exact start and end dates. Period. There’s no shortcut here. Use a calendar app, count the days, divide by 7. Could be 30 weeks, could be 31, depends on the specific months. It’s a pain, but it’s reality.
Wrapping It Up
So yeah, thought it’d be 28 weeks. Learned the hard way it’s almost always around 30 to 31 weeks. That “4 weeks per month” rule? Practically useless. It gets you wrong answers fast. Makes sense why apps and calendars seem weird now – they’re trying to account for the messy real world.
Next time someone asks? I’m telling them “about 30 weeks” and stressing they check real dates if precision matters. Saves everyone a headache. Glad I didn’t rely on Google. Got my notebook full of scratched-out numbers and calendar marks to prove the struggle was real!