Use the pregnancy birth calculator to quickly estimate your due date and track your pregnancy progress week by week. Simply enter your known details, whether it’s your last menstrual period, ultrasound measurements, conception date, or IVF transfer information, and get a clear timeline.
How the Pregnancy Birth Calculator Works
The pregnancy birth calculator adapts to the information you provide.
- Last Menstrual Period (LMP): Adds 280 days to the first day of your period to calculate your due date.
- Ultrasound: Adjusts timing based on gestational age measured during the scan.
- Conception Date: Uses a 266-day gestational count from fertilization.
- IVF Transfer: Factors in embryo age and transfer date for a precise estimate.
This flexibility ensures the pregnancy birth calculator works for natural, assisted, and ultrasound-based pregnancies alike.
What You Get From the Calculator
Using this tool, you will receive:
- Estimated due date
- Current gestational age
- Number of days remaining
- Trimester information
- Estimated conception date
- Week-by-week milestone table
- Expected birth season and zodiac sign
These details make it easier to understand your pregnancy timeline and plan accordingly.
To give you an idea of how the inputs look, here is a simple example.
Example Input
| Field | Value |
|---|---|
| Estimate Based On | Last Period |
| First Day of Your Last Period | 11/11/2025 |
| Average Cycle Length | 28 |
Pregnancy Due Date Estimate
| Item | Value |
|---|---|
| Estimated Due Date | 18 Aug 2026 |
| Current Gestational Age | 1 weeks 0 days |
| Days Remaining | 273 days |
| Trimester | 1st Trimester |
| Estimated Conception Date | 25 Nov 2025 |
| Baby’s Zodiac Sign | Leo ♌ |
| Birth Season | Summer |
Pregnancy Milestones
| Week | Date Range | Baby Size | Development |
|---|---|---|---|
| Week 12 | 3 Feb 2026 – 9 Feb 2026 | Plum | Major organ development begins |
| Week 20 | 31 Mar 2026 – 6 Apr 2026 | Banana | First kicks may be felt and gender known |
| Week 30 | 9 Jun 2026 – 15 Jun 2026 | Cabbage | Rapid weight gain starts |
| Week 40 | 18 Aug 2026 – 24 Aug 2026 | Watermelon | Ready for birth! |
NOTE: – This calculator follows standard medical models such as Naegele’s Rule and IVF adjustments. For exact medical assessment, consult your healthcare provider.
The pregnancy birth calculator provides a reliable estimate based on standard medical formulas. While every pregnancy can vary slightly, especially due to ovulation timing or measurement differences, this calculator gives a clear overview of your expected progression. Ultrasound or IVF data typically provide the most precise estimates, but any supported method offers useful insight.
Many users find the pregnancy birth calculator helpful for tracking milestones, planning appointments, and staying informed about their trimester stages.