Pregnancy Due Date Calculator — Free Online Calculator & Formula Guide
Calculate your estimated due date from LMP, conception date, or IVF transfer date. View current pregnancy week, trimester milestones timeline, and days.
Due Date Calculator
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Current Gestational Age
Past estimated due date
Pregnancy Progress (100% of 40 weeks)
81 days past due
Estimated Conception Date
June 29, 2025
1st Trimester
June 15, 2025 → September 20, 2025 (Weeks 1–13)
2nd Trimester
September 21, 2025 → December 27, 2025 (Weeks 14–27)
3rd Trimester
December 28, 2025 → March 22, 2026 (Weeks 28–40)
Current Trimester
▲ N/A
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Full Timeline (21 milestones)
Home pregnancy tests typically show positive. hCG levels measurable in blood.
Sunday, July 13, 2025
Heart begins beating at ~100 bpm. May be visible on transvaginal ultrasound.
Sunday, July 20, 2025
First ultrasound often scheduled. Gestational sac and yolk sac visible.
Sunday, July 27, 2025
Confirmation of pregnancy, health history review, blood work, and dating ultrasound.
Sunday, August 10, 2025
Non-Invasive Prenatal Testing (cell-free DNA) can screen for chromosomal conditions.
Sunday, August 24, 2025
Nuchal translucency ultrasound and blood work. Screens for Down syndrome and other conditions.
Sunday, September 7, 2025
All major organs formed. Miscarriage risk drops significantly after week 12.
Sunday, September 14, 2025
Blood test screening for neural tube defects, Down syndrome, and trisomy 18.
Sunday, October 5, 2025
First fetal movements felt. Earlier in subsequent pregnancies; may be later in first.
Sunday, October 19, 2025
Detailed ultrasound checking fetal anatomy, organs, and gender determination.
Sunday, November 2, 2025
Fetus may survive outside the womb with intensive medical support. ~50% survival at 24 weeks.
Sunday, November 30, 2025
Screening for gestational diabetes. Follow-up 3-hour test if elevated.
Sunday, December 14, 2025
Increased prenatal visit frequency (every 2 weeks). Rhogam shot if Rh-negative.
Sunday, December 28, 2025
Begin kick counts. Most practitioners recommend tracking daily fetal movements.
Sunday, January 11, 2026
Follow-up ultrasound to check fetal growth, positioning, and amniotic fluid levels.
Sunday, January 25, 2026
GBS swab test. Positive results require IV antibiotics during labor.
Sunday, February 8, 2026
Visits every week until delivery. Cervical checks, fetal position assessment.
Sunday, February 22, 2026
Baby considered early term. Lungs are mature. Planned C-sections scheduled from here.
Sunday, March 1, 2026
Optimal delivery window. Baby fully developed — lungs, brain, and immune system mature.
Sunday, March 15, 2026
Estimated Due Date. Only ~5% of babies arrive on the exact due date. Normal range: 37–42 weeks.
Sunday, March 22, 2026
Additional monitoring if undelivered. Discussion of induction options.
Sunday, March 29, 2026
Medical Disclaimer
This timeline is for informational and educational purposes only. Every pregnancy is unique. Milestone timing varies based on individual factors, equipment quality, and fetal positioning. Always follow your healthcare provider's recommended screening and appointment schedule. If you have concerns about any milestone or symptom, contact your OB/GYN or midwife immediately.
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