Pregnancy & Conception Calculator
Calculate your conception date, due date, and trimester endpoints from your last period date.
How to Use the Pregnancy & Conception Calculator
- Enter the date of your last menstrual period.
- Click Calculate to compute your conception date, due date, and trimester end dates.
- Review the full pregnancy timeline including all three trimester milestones.
- Use the dates to plan prenatal check-ups and track your pregnancy progress.
Quick Reference
| From | To |
|---|---|
| 1st trimester | Weeks 1–12 |
| 2nd trimester | Weeks 13–26 |
| 3rd trimester | Weeks 27–40 |
| Due date | 40 weeks (280 days) |
| Full term | 37–42 weeks |
| Preterm | < 37 weeks |
Use Cases
- •Monitoring personal health metrics as part of a wellness routine.
- •Setting evidence-based goals for diet, exercise, or weight management.
- •Preparing for a medical appointment with baseline body measurements.
- •Tracking changes in body composition over time.
Formula
Conception ≈ LMP + 14 days. Due date = LMP + 280 days. Trimesters: 1st ends at 12 weeks, 2nd at 26 weeks.
Frequently Asked Questions
How to use?
Enter your last menstrual period date and click Calculate to see your conception date, due date, and trimester milestones.
Calculation accuracy?
Calculations are performed with high precision.
Is it free?
Yes, all calculators are completely free.