Estimated due date
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Your result will appear here after calculation.
Pregnancy Hub
Pregnancy Due Date & Milestone Calculator
Medical-style premium tool
Accurately estimate your due date and every key pregnancy milestone.
Use five professional calculation methods, compare delivery windows, and follow a refined week-by-week timeline inspired by the best pregnancy calculators.
40 weeks
Standard LMP estimate
266 days
From conception to birth
37-42 weeks
Typical safe delivery window
Why users trust it
Professional visuals, practical calculations, and milestone planning in one elegant experience.
Calculator
Choose your method and calculate instantly
Adjusts due date to 37-38 weeks (twins typically arrive earlier)
Twin or multiple pregnancy
Adjusts due date to 37-38 weeks (twins typically arrive earlier)
Delivery window
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A healthy delivery window is typically 37 to 42 weeks.
Milestone snapshot
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We will calculate the key pregnancy dates for you.
Pregnancy milestones at a glance
First trimester milestone
Many people complete early screening around this stage.
Week 12
Mid-pregnancy scan
The anatomy scan often happens around 18 to 22 weeks.
Week 20
Third trimester begins
Pregnancy enters the final stretch and monitoring typically becomes more frequent.
Week 28
Early term
Twins and multiples are often delivered in this window based on medical guidance.
Week 37
Estimated due date
A full-term pregnancy is commonly measured at 40 weeks from the last menstrual period.
Week 40
Diet and lifestyle guidance
A polished pregnancy tool should go beyond the math. Balanced hydration, folate-rich meals, prenatal vitamins, regular prenatal care, and gentle movement are often part of a healthy routine. The guidance below is intentionally educational and supportive.
Nutrition
Choose protein, whole grains, colorful vegetables, and iron-rich foods whenever possible.
Lifestyle
Rest, stress reduction, and routine checkups help create a calmer pregnancy experience.
FAQ
Helpful answers for planning your pregnancy timeline
How does the pregnancy due date calculator work?
The calculator estimates an expected delivery date using the method you choose. Last period uses Naegele's Rule, conception date adds 266 days, ultrasound back-calculates from gestational age, IVF uses embryo transfer timing, and due date reverse lookup shows the current week and likely conception window.
Can I use the calculator if my cycle is irregular?
Yes, but the result is less precise. If your periods are irregular, the conception date, ultrasound, or IVF methods are usually more reliable than a standard last-period estimate. You can also adjust cycle length to make the estimate slightly more personal.
Is my due date guaranteed? (Explaining the 5% birth reality and 37-42 weeks safe delivery window)
No. Only around 5% of babies arrive exactly on the estimated due date. A healthy delivery can happen anywhere from 37 to 42 weeks, so the calculator should be treated as an evidence-based estimate rather than a promise.