Pregnancy Calculator
Calculate due date, track pregnancy weeks, and plan important milestones throughout your pregnancy journey.
Pregnancy Information
Important Note
This calculator provides estimates only. Always consult with your healthcare provider for accurate dating and personalized care.
Due Date
Range: 5/30/2026 - 6/27/2026
Current Stage
First trimester
Progress
0 days complete
Baby Size This Week
Recent Milestones
Upcoming Milestones
How it works
A pregnancy calculator estimates your due date and how far along you are. The standard method (Naegele's rule) counts 280 days (40 weeks) from the first day of your last menstrual period (LMP), since gestational age is measured from then, not from conception.
Due date (Naegele's rule)
Due date = LMP + 280 days ≈ LMP − 3 months + 7 days
- LMP
- first day of your last menstrual period
- 280 days
- 40 weeks of gestational age
Worked example
- LMP = January 1
- Add 280 days (or: − 3 months + 7 days)
Estimated due date ≈ October 8.
Good to know
- Only about 1 in 20 babies arrive exactly on the due date; full term is anywhere from 37 to 42 weeks.
- Gestational age counts from LMP, so you're considered ~2 weeks pregnant at conception.
- An early ultrasound gives a more accurate date than LMP if your cycle is irregular.
Related Calculators
Frequently Asked Questions
How is due date calculated?
Due date is 280 days (40 weeks) from first day of last menstrual period (LMP). Only 5% of babies arrive on exact due date.
What are the pregnancy trimesters?
First trimester: weeks 1-12, Second: weeks 13-27, Third: weeks 28-40. Each has distinct developmental milestones and symptoms.
When are key prenatal appointments?
First visit: 8-10 weeks, Monthly until 28 weeks, Biweekly until 36 weeks, Weekly until delivery. May vary based on risk factors.
How often should I exercise?
The WHO recommends at least 150 minutes of moderate-intensity or 75 minutes of vigorous-intensity aerobic activity per week.
What is a balanced diet?
A balanced diet includes variety from all food groups: fruits, vegetables, whole grains, lean proteins, and healthy fats.
How much water should I drink?
General recommendation is 8-10 glasses (2-2.5 liters) per day, adjusted for activity level and climate.
How important is sleep?
Sleep is crucial for physical recovery, mental health, and overall wellbeing. Adults need 7-9 hours nightly.