Health & Fitness

Nepal Pregnancy Due Date Calculator

नेपाल गर्भावस्था प्रसूति मिति क्याल्कुलेटर

Calculate your expected due date from LMP or conception using Naegele’s rule, with trimesters and milestones in AD and BS.

Estimate your baby's due date from your last period or conception date. The calculator works in AD and BS, adjusts for your cycle length and shows key pregnancy milestones.

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Estimated due date—

Gestational age today: —
Trimester: —
Days remaining: —
Last menstrual period: —
Estimated conception: —
Due date (AD): —

Milestone	Week	AD date	BS date

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About the Nepal pregnancy due date calculator

This calculator estimates a baby's due date from the first day of the last menstrual period (LMP) or from the conception date. It uses Naegele's rule, the standard method used by doctors and midwives: add 280 days to the LMP for a 28-day cycle, then adjust for a shorter or longer cycle. The result is shown in both AD and BS, along with the current gestational age and the key milestone weeks.

LMP method or conception method

The LMP method is the usual clinical approach because the exact conception date is rarely known. It assumes ovulation around day 14 of a 28-day cycle. If your cycles are regularly longer or shorter, enter your average cycle length so the estimate shifts accordingly. The conception method is more direct if you know the date, and it adds 266 days.

What the milestones mean

The tool shows the end of the first trimester at 14 weeks, the anatomy-scan window at 18 to 22 weeks, the viability milestone at 24 weeks, the start of the third trimester at 28 weeks and the full-term window from 37 weeks. These are general reference points, not a substitute for antenatal appointments.

Only about 4% of babies arrive on the due date

A due date is an estimate, not an appointment. Normal pregnancy ranges from 37 to 42 weeks, and many babies are born a little before or after the calculated date. Your doctor may revise the estimate after an early ultrasound, especially if your cycle is irregular or the LMP is uncertain.

Antenatal care in Nepal

Nepal's safe motherhood programme recommends at least four antenatal check-ups, with the first as early as possible. Registered pregnancies can access free check-ups, iron and folic acid, tetanus-diphtheria vaccination and delivery care at public facilities. The Aama programme provides transport incentives for institutional delivery. Contact your local health post or birthing centre for the current schedule.

Medical disclaimer: This is an educational estimate. It does not diagnose or rule out any condition. Follow your doctor's or midwife's advice for dating, screening and delivery planning.

Frequently asked questions

How is a pregnancy due date calculated?

The common method is Naegele's rule: add 280 days (40 weeks) to the first day of your last menstrual period. If your cycle is not 28 days, the calculator adjusts the date by the difference. The conception method adds 266 days instead.

How accurate is the due date?

It is an estimate. Only about 4% of babies are born exactly on the due date, and a normal pregnancy can last from 37 to 42 weeks. An early ultrasound can give a more accurate date, especially if your cycles are irregular.

Can I use this calculator with Bikram Sambat dates?

Yes. Choose BS and enter the date in the Nepali calendar. The tool converts it to AD, calculates the due date and shows the result in both calendars.

What if my cycle is longer than 28 days?

Enter your average cycle length. A longer cycle usually means later ovulation and a later due date; a shorter cycle means an earlier one. The calculator adjusts the estimate automatically.

What is the conception method?

If you know the conception date, the tool adds 266 days to estimate the due date. This avoids the assumption that ovulation happened on day 14 of your cycle.

When should I have my first antenatal check-up?

As early as possible after a positive pregnancy test. Nepal's safe motherhood programme recommends at least four check-ups during pregnancy. Your local health post can register the pregnancy and explain the free services available.