Calculate due date
Enter your LMP or conception date, then click Calculate
How to Use the Due Date Calculator
Enter the first day of your last menstrual period (LMP) or your conception date if known. The calculator instantly estimates your due date, current pregnancy week and day, conception window, and key milestones throughout the pregnancy. A trimester breakdown shows important developmental stages and upcoming appointments.
Features
ToolNova Due Date Calculator offers:
- Due date estimation from LMP or conception date
- Current pregnancy week and day tracking
- Trimester breakdown with dates
- Key developmental milestones timeline
- Conception date estimation
- Important pregnancy timeline markers
- Gestational age calculation
- Multiple due date method support
Why Use a Due Date Calculator?
Knowing your estimated due date helps you plan prenatal care, track fetal development, and prepare for your baby's arrival. ToolNova Due Date Calculator provides accurate estimates using standard medical formulas and gives you a complete pregnancy timeline from conception through all three trimesters.
Frequently Asked Questions
How is the due date calculated?
The due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period, or 266 days from conception.
How accurate is the due date?
Only about 5% of babies are born on their exact due date. The calculator provides an estimate; your healthcare provider will refine it with ultrasound measurements.
Can I calculate from conception date?
Yes. If you know your conception date, select that option for a more precise due date estimate.
Does it show current pregnancy week?
Yes. The calculator shows exactly which week and day of pregnancy you are in based on the dates entered.
Is this due date calculator free?
Yes. ToolNova's Due Date Calculator is completely free with no usage limits.