🌸 Pregnancy Calculator

How Many Weeks Pregnant Am I?

Q: How do you calculate weeks pregnant from LMP?

We count whole days from your LMP date to today, then convert to weeks and remaining days.

Q: Can I use this if I have irregular cycles?

You can, but accuracy may vary. Many providers adjust dates using ultrasound measurements.

Q: Is this medical advice?

No. This tool is informational only. Always follow your healthcare provider's guidance.

Enter the first day of your last menstrual period (LMP) to find out how many weeks and days pregnant you are.

You are

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Pregnancy is typically counted from your LMP, even though conception happens about 2 weeks later. Your healthcare provider uses the same method.

Frequently Asked Questions

How do you calculate weeks pregnant from LMP?

We count the total number of days from your LMP date to today, then divide into weeks and remaining days. Standard obstetric dating always starts from your last menstrual period.

Can I use this if I have irregular cycles?

You can, but your results may be less accurate. If you have irregular periods, your provider may use an early ultrasound to confirm gestational age.

What's the difference between weeks pregnant and weeks since conception?

Gestational age (weeks pregnant) is measured from LMP and is about 2 weeks ahead of fetal age (weeks since conception). Healthcare providers always use gestational age.

Is this medical advice?

No. This calculator is for informational purposes only. Always follow the guidance of your healthcare provider.