Due Date Calculator
Estimate your baby’s expected date of delivery (EDD) based on your last menstrual period (LMP) and average cycle length.
Due Date Calculator – Estimate Your Baby's Arrival
This Due Date Calculator helps expecting parents estimate the expected date of delivery (EDD) based on the first day of the last menstrual period (LMP) or conception date. It's an essential tool for early pregnancy planning and tracking your trimester milestones.
Whether you’re planning for your baby’s arrival, scheduling prenatal visits, or simply staying informed, this calculator provides quick and accurate predictions — all without needing a doctor's visit.
- Calculate your due date based on LMP or conception
- Get trimester breakdowns and current pregnancy progress
- Accurate estimate using standard 280-day gestation
- No account or app download needed
- Private and secure – nothing is saved
Use this tool as a first step in your pregnancy journey or to complement medical consultations and prenatal tracking apps.
Frequently Asked Questions (FAQ)
How is the due date calculated?
The calculator estimates your due date by adding 280 days (40 weeks) to the first day of your last menstrual period, which is the standard method used by healthcare providers.
Can I use the date of conception instead?
Yes. If you know your exact conception date, the tool will estimate your due date by adding 266 days (38 weeks), which reflects the post-ovulation gestation period.
How accurate is the due date?
The due date is an estimate. Most babies are born between 37 and 42 weeks. Regular checkups and ultrasounds can provide more precise tracking.
Is my data saved or shared?
No. This tool runs completely in your browser. Your inputs are not stored, shared, or sent anywhere.