How accurate are these calculators?

Question

I’m still waiting for my first appointment with the antenatal team. Just wondering how accurate these calculators are.

Answer

No due date calculation is 100% accurate. Not even the doctors. It’s just a guesstimate. It is subject to change depending on baby’s size throughout pregnancy too.

Answer

It's worked on your LMP, so it's the same as what the doctor/midwife will work on to find out how far along you are. Its estimated as although you may have regular cycles you can ovulate whenever, and also if you have irregular it doesnt tend to be accurate at all. I ovulated 4 weeks post my LMP so I was 2 weeks less than what the midwife had me at, which I knew so wasnt fussed.

Answer

Mine was a week out. Used this before I was 12 weeks but my dating scan confirmed it was a week sooner.

Answer

I can’t even use the NHS calculator because it won’t let you enter a cycle more than 40 or 42 days 🙈 
They’re only a baseline until your 12 week scan - that will determine your due date 😊

Answer

It’s normally two or three days out for me it was two days this time ❤️❤️💙💙

How accurate are these calculators?

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