How accurate is the due date?

Only about 5% of babies are born on the exact EDD (Expected Date of Delivery) given to them. This date is an estimate based on an average 40 week pregnancy. The most accurate way to determine the date is the ultrasound scan done at 12 weeks.

How to calculate the due date of the baby?

According to Naegele's rule: Counting back 3 months from the date of the last menstrual period (LMP), adding 7 days and a year. Or: LMP + 280 days.

Ola makuahine

Ka lā hānau keiki (EDD)

E helu i ka lā hoʻopaʻa ma muli o ka manawa menstrual hope loa

Medically Reviewed:

Dr. Priya Sammani, MBBS, PG Dip. FM

Updated on: April 2026

❓ Frequently Asked Questions (FAQ)

Pehea ka pololei o ka lā kau?

Ma kahi o 5% wale nō o nā pēpē i hānau ʻia ma ka EDD (Date i manaʻo ʻia o ka hānau ʻana) i hāʻawi ʻia iā lākou. He kuhi kēia lā ma muli o ka awelika 40 wiki o ka hāpai ʻana. ʻO ke ala pololei loa e hoʻoholo ai i ka lā ʻo ia ka ultrasound scan i hana ʻia ma 12 pule.

Pehea e helu ai i ka lā hānau o ke keiki?

Wahi a ke kānāwai o Naegele: E helu ana i 3 mahina mai ka lā o ka menstrual period (LMP), e hoʻohui i 7 mau lā a me ka makahiki. A i ʻole: LMP + 280 lā.

🔗 Other Related Calculators

📚 Scientific Sources and Equations

ʻO ka World Health Organization (WHO) a me nā alakaʻi lapaʻau lapaʻau i ʻike ʻia ma ka honua a me nā hoʻohālikelike maʻamau.

⚕️ For educational purposes only🔒 No data is stored✅ Completely Free

Medical Disclaimer: These calculators are provided for educational purposes only and are not a substitute for professional medical advice. Always consult a qualified physician regarding any health concerns..