Pregnancy Calculator
Calculate your due date and track pregnancy stages
About Pregnancy
Normal Pregnancy Duration:
A normal pregnancy lasts approximately 280 days (40 weeks) from the first day of your last menstrual period.
Three Trimesters of Pregnancy:
- First Trimester: Week 1 to Week 13
- Second Trimester: Week 14 to Week 27
- Third Trimester: Week 28 until birth
Note: This calculator provides an estimate. Please consult your healthcare provider for accurate information and pregnancy monitoring.
Enter First Day of Last Menstrual Period
Important Tips for Pregnant Women
- Regular checkups with your healthcare provider
- Take prescribed prenatal vitamins (especially folic acid)
- Maintain a healthy, balanced diet
- Drink plenty of water
- Exercise appropriately for pregnancy
- Get adequate rest and sleep
- Avoid smoking, alcohol, and unprescribed medications
- Complete regular tests and screenings
ℹ️ About This Tool
The Pregnancy Calculator is an accurate free tool that helps expectant mothers calculate their due date and track pregnancy stages week by week. The calculator provides full support for both Hijri and Gregorian calendars, with tracking of the three trimesters (1st, 2nd, and 3rd) and remaining days until delivery.
Benefits of Using the Calculator:
- Dual Calendar Support: Calculate in Hijri or Gregorian calendar based on your preference
- Accurate Calculation: Uses medical standard (280 days / 40 weeks) for due date calculation
- Trimester Tracking: Know your current pregnancy stage (1st, 2nd, or 3rd trimester)
- Weekly Progress: Track the current week and day of pregnancy accurately
- Medical Tips: Important information and guidance for each pregnancy stage
📋 How to Use
- Choose Calendar Type: Select Hijri or Gregorian calendar based on your preference
- Enter Day: Select the first day of your last menstrual period (1 to 31)
- Select Month: Choose the month when your last period started
- Select Year: Pick the appropriate year (current or previous)
- Calculate: Click the "Calculate" button to get your expected due date
- View Results: See your due date in both calendars, current pregnancy week, trimester, and days remaining
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FAQ about Pregnancy Calculator
The expected due date is calculated by adding 280 days (40 weeks) to the first day of your last menstrual period (LMP). This is known as Naegele's rule. You can also calculate from conception date by adding 266 days (38 weeks). The due date is an estimate and delivery may occur 2 weeks before or after.
First trimester (weeks 1-12): Major organs form, morning sickness, severe fatigue. Second trimester (weeks 13-27): Best period for mom, rapid fetal growth, baby movements begin. Third trimester (weeks 28-40): Significant weight gain, bladder pressure, preparation for delivery.
Normal weight gain depends on pre-pregnancy weight: Normal weight (BMI 18.5-24.9): 11-16 kg, Underweight (BMI below 18.5): 13-18 kg, Overweight (BMI 25-29.9): 7-11 kg, Obese (BMI 30+): 5-9 kg. Most gain occurs in the second and third trimesters.
Under Saudi labor law, working women get 10 weeks (70 days) maternity leave at full pay, distributable before and after delivery with maximum 4 weeks before the expected date. It can be extended one month without pay. She is also entitled to sick child care leave.
Key tests: Complete blood count and blood type (week 8), first ultrasound (week 12), gestational diabetes test (weeks 24-28), GBS bacteria test (week 36), and regular follow-ups every 4 weeks then every 2 weeks then weekly in the last month.