How Many Weeks Pregnant Am I?
Not sure how far along you are? Use this free pregnancy weeks calculator to instantly find out how many weeks pregnant you are based on the first day of your last menstrual period (LMP).
As of February 28, 2026 (UTC)
Find Out How Many Weeks Pregnant You Are
This free “How Many Weeks Pregnant Am I?” calculator helps you estimate your current pregnancy week based on the first day of your last menstrual period (LMP). It gives you an approximate gestational age, which is the method most healthcare providers use to track pregnancy progress.
To use it, simply enter the date of your last period. The tool then calculates how many weeks and days pregnant you are today — no guesswork needed. You can also explore our Age Calculator to determine your exact age or your baby’s age once born.
This pregnancy week tracker is a great resource for early planning, prenatal appointments, and understanding which trimester you're in. Looking ahead? You may also want to check out your health metrics using our BMI Calculator and Body Fat Percentage Estimator.
Maintaining a healthy heart rate is also important during pregnancy. Use our Target Heart Rate Calculator to find your ideal exercise range.
Frequently Asked Questions
How does the calculator determine how many weeks pregnant I am?
It calculates gestational age based on the first day of your last menstrual period (LMP), which is the standard method used by healthcare providers.
What if I don’t know the exact date of my last period?
Try to estimate as closely as possible. If you're unsure, consult your OB-GYN or use an ultrasound date once available.
Is this calculator accurate?
It’s accurate based on the LMP method, which assumes a 28-day cycle. For exact results, especially if your cycle varies, always follow up with a healthcare provider.
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