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Pregnancy Due Date Calculator

Private, client-side calculation

Pregnancy Due Date Calculator

Estimate your due date, gestational age, trimester and pregnancy milestones using standard obstetric dating formulas.

days
STEP 01📅
Enter your dating date
Use your last menstrual period, conception date, IVF transfer date or ultrasound data.
STEP 02🍼
Apply pregnancy dating
The calculator converts the date into an estimated due date using a 40-week pregnancy model.
STEP 03✨
Review milestones
See gestational age, trimester, days remaining and key pregnancy checkpoints.
Estimated Due Date
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Enter a date
📅
Gestational Age
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weeks + days
🍼
Trimester
—
pregnancy stage
🌿
Days Remaining
—
until due date
⏳
Progress
—
of 40 weeks
📈
📸 Your due date card is ready
Download the announcement card, share the news, or add the due date to your calendar.
Pregnancy Details
days
days
Pregnancy Timeline
🍼

Hit Calculate to see your timeline

Key Date Metrics
🧮

Metrics appear after calculation

✦ Result Explainer
✦

Your explanation appears here

▣ Milestone Plan
📋

Your milestones appear after calculation

◎ What If Simulator

Test a different cycle length or date shift without changing your main result.

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Calculate your baseline first

● Ask About Your Result
Calculate first, then ask about your due date, trimester, milestones or date method.
Frequently Asked Questions

For last menstrual period dating, the calculator adds 280 days to the first day of the last period and adjusts for cycle length. Known conception dating adds 266 days. IVF dating uses transfer date plus embryo-age adjustment.

Early ultrasound can estimate gestational age from embryo or fetal measurements. A clinician may update the estimated due date when scan dating is more reliable than period dates or cycle history.

No. The estimated due date is a planning reference, not a prediction. Many births happen in the weeks before or after the due date, and individual medical care should guide decisions.

Pregnancy & Calculation Disclaimer

Results are estimates generated locally in your browser using standard pregnancy dating formulas. They are for informational purposes only, not medical advice, diagnosis, or a substitute for prenatal care. Confirm dating, symptoms, medications, and pregnancy decisions with a qualified healthcare professional. VisionVix accepts no liability for decisions based on this output.

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