Due Date and Maternity Leave Calculator

Choose how to calculate, enter the date and your country of work to see your due date, how far along you are, and when your maternity leave can start and end.

Prepared and reviewed by the Mustahaqati team · Last updated: 2026-11-03

Work out your due date and leave dates

How the due date is calculated

Due date = first day of the last period + 280 days (40 weeks), Naegele's rule as used by the American College of Obstetricians and Gynecologists. If your cycle is longer than 28 days the difference is added, because ovulation comes later by the same amount. From conception add 266 days; for IVF count from the transfer day: 261 days for a day-5 embryo and 263 for a day-3 embryo.

Maternity leave across the GCC

Country	Length	Earliest start before birth	Note
Saudi Arabia	12 weeks on full pay	4 weeks	6 weeks after birth are mandatory; GOSI pays 3 months after 12 months of contributions
UAE	60 days (45 full + 15 half pay)	Last day of the month before the birth month	Plus up to 45 unpaid days for pregnancy or birth complications
Qatar	50 days on full pay	15 days	After one year of service, with at least 35 days after birth
Kuwait	70 days on full pay	As long as the birth falls within the leave	Up to 4 more months unpaid with the employer's approval
Bahrain	60 days on full pay	As long as the birth falls within the leave	No work for 40 days after birth; 15 more days unpaid
Oman	98 days on full pay	14 days	Reimbursed by the Social Protection Fund; 7 days for fathers

Pregnancy by weeks

First trimester: to the end of week 13, when an ultrasound dates the pregnancy most accurately.
Second trimester: weeks 14 to 27.
Third trimester: week 28 to birth.
Term: early term 37–38, full term 39–40, late term 41, post-term from 42 weeks.

The calculator gives estimates and does not replace your doctor's care. Leave dates assume birth on the due date; an earlier or later birth changes them under each country's law.

Frequently asked questions

How is the due date calculated?

By adding 280 days (40 weeks) to the first day of the last menstrual period, plus the difference between your cycle length and 28 days. From conception add 266 days; for IVF add 261 days from a day-5 embryo transfer and 263 days from a day-3 transfer, per ACOG Committee Opinion 700.

Will the baby arrive on the due date?

The date is an estimate. Term starts at 37 weeks, full term is 39 to 40 weeks, late term is 41 weeks and post-term is 42 weeks or more. A first-trimester ultrasound is the most accurate way to date a pregnancy, so your doctor may set a different date.

How do I know how many weeks pregnant I am?

Pregnancy is counted from the first day of the last period, not from conception, so you are about 2 weeks pregnant at conception. The first trimester runs to the end of week 13, the second to the end of week 27, and the third from week 28 to birth.

When does maternity leave start in Saudi Arabia?

Up to four weeks before the expected delivery date. It lasts 12 weeks on full pay, and the six weeks after birth are mandatory (Article 151 of the Labour Law).

When does maternity leave start in the UAE?

From the last day of the month before the expected month of delivery. It lasts 60 days: 45 on full pay and 15 on half pay (Article 30 of Decree-Law 33/2021).

How long is maternity leave in Qatar, Kuwait, Bahrain and Oman?

Qatar 50 days on full pay after one year of service, up to 15 of them before birth. Kuwait 70 days, with the birth falling inside them. Bahrain 60 days, with a ban on work for 40 days after birth. Oman 98 days, up to 14 of them before birth.

Sources

Figures and formulas on this page were last reviewed on 2026-11-03.