Free online pregnancy calculator
Pregnancy Calculator
Pregnancy week calculator — gestational age, trimester, and due date from LMP.
- Free · No signup
- Instant results
- Private in your browser
- Works on mobile
Result
See gestational age and trimester from your LMP.
About this pregnancy calculator
Enter the first day of your last menstrual period to see how many weeks pregnant you are, which trimester you are in, and your estimated due date.
Use this free online pregnancy calculator when you need a quick, clear estimate without creating an account. Calculations run in your browser on Toolwright, so your inputs stay private. Results are for education and planning — confirm important financial, tax, or health decisions with a qualified professional.
How to use the Pregnancy Calculator
- Enter the values asked for in the form — amounts, rates, dates, or measurements depending on the tool.
- Tap calculate to see your result instantly. Adjust inputs anytime to compare scenarios.
- Review the breakdown and FAQs below if you want more context on what the numbers mean.
Why people use Toolwright
- Clear answers — dedicated page for the pregnancy calculator, built to load fast and stay easy to read.
- Fast & free — no paywall, no email gate, results above the noise.
- US-ready — copy and units aimed at American and Western users.
- One toolkit — jump to related pregnancy tools without leaving the site.
Pregnancy Calculator FAQ
Is this medical advice?
No. These calculators provide estimates only. For diagnosis or treatment decisions, consult a qualified clinician.
Is my health data stored?
No. Calculations run in your browser. Nothing you enter is uploaded to our servers.