Loading Intelligence...
How Many Weeks Pregnant Am I?
Free Pregnancy Week Calculator
100% Free — No Sign-up Required
This is the start date of your last period, not the date of conception.
Track Every Week of Your Pregnancy Journey
Get personalized, AI-powered support throughout your pregnancy with Mom's Bloom
Join the Waitlist — It's FreeImportant Medical Disclaimer
This calculator provides an estimate only based on the first day of your last menstrual period (LMP). Actual gestational age and due date should be confirmed by a healthcare provider using ultrasound. This tool is for informational purposes and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or midwife for pregnancy care.
Frequently Asked Questions
How is gestational age calculated?
Gestational age is calculated from the first day of your last menstrual period (LMP), not from the date of conception. This is the standard method used by healthcare providers worldwide.
Is this pregnancy calculator accurate?
This calculator provides an estimate based on the LMP method. The most accurate way to determine gestational age is through an ultrasound performed by your healthcare provider, especially in the first trimester.
Do I need to sign up to use this calculator?
No! This pregnancy week calculator is 100% free and requires no sign-up. All calculations are performed entirely in your browser—no data is sent to any server.
What if I don't remember my LMP?
If you don't remember the exact date of your last period, your healthcare provider can estimate your due date using an ultrasound, which measures the size of the fetus.
What are the trimesters?
Pregnancy is divided into three trimesters:
First Trimester: Weeks 1-13
Second Trimester: Weeks 14-26
Third Trimester: Weeks 27-40
This free tool is provided by Mom's Bloom, your AI-powered pregnancy companion.