To find out how many weeks pregnant you are, the most common and reliable method is to count from the first day of your last menstrual period (LMP). Pregnancy is typically counted as lasting about 40 weeks starting from this date, even though conception usually occurs about two weeks after the start of your last period
How to Calculate Your Weeks Pregnant
- Identify the first day of your last menstrual period.
- Count the number of weeks from that date up to the current date.
- The total number of weeks counted is how many weeks pregnant you are.
For example, if your last period started 8 weeks ago, you are considered 8 weeks pregnant
Additional Notes
- If you are unsure of your LMP date, an ultrasound scan around 7 to 12 weeks of pregnancy can provide a more accurate estimate of how far along you are
- Pregnancy usually lasts between 37 and 42 weeks, so the due date is an estimate and can vary
- Many online pregnancy calculators can do this calculation for you by entering your LMP date
If you provide the date of your last period, I can help calculate how many weeks pregnant you are based on that information.
