Pregnancy Due Date Calculator
Estimate your expected delivery date using NHS (Naegele’s rule) standards. Default view is UK formatting; you can switch to US or ISO. Supports LMP, estimated conception, and IVF embryo-transfer entries.
This tool uses NHS-style calculation (LMP + 280 days). Results are estimates — always follow advice from your midwife or clinician.
Pregnancy Due Date Calculator – Your Step Towards a Healthy Journey
Our Pregnancy Due Date Calculator is a simple yet powerful tool designed to help expectant mothers estimate when their baby is likely to arrive. By entering the date of the first day of your last menstrual period (LMP), the calculator provides your estimated due date (EDD). This gives you a clearer picture of your pregnancy timeline, helping you prepare emotionally, physically, and practically for the months ahead. Pregnancy normally lasts between 37 and 42 weeks from the first day of your last period, though every pregnancy is unique.
How to Use the Pregnancy Due Date Calculator
Using the calculator is straightforward. Simply:
- Enter the first day of your last menstrual period.
- Click “Show My Due Date”.
- Instantly receive an estimated delivery date, along with your current pregnancy week.
This approach follows the NHS standard in the UK, but it is also widely recognised by healthcare providers in the United States and across the world. If you are unsure about your period dates, don’t worry. Midwives and doctors use an ultrasound scan around 12 weeks (sometimes called the dating scan) to provide a more accurate estimate.
Why Is Knowing Your Due Date Important?
Knowing your estimated due date helps you track your baby’s growth, plan antenatal appointments, and prepare for birth. It also guides you in making lifestyle adjustments such as diet, exercise, and rest, which are vital for both mother and baby. Globally, many women rely on due date calculators as an early step in pregnancy planning before formal scans.
Features of Our Pregnancy Due Date Calculator
- Accurate estimates: Based on your last menstrual cycle, aligned with NHS guidelines.
- Global adaptation: Includes formats and explanations for UK, US, and international audiences.
- Simple design: Feminine and modern theme for a calm, user-friendly experience.
- Pregnancy tracker: Shows your current week of pregnancy and remaining weeks.
- Educational tips: Learn about changes in your body and your baby’s development as you progress week by week.
Pregnancy Week by Week – What to Expect
Pregnancy is an extraordinary journey, and each week brings new changes for both you and your baby. Here are some highlights of what you might experience:
- Weeks 1–4: Early pregnancy signs such as fatigue, tender breasts, and missed periods may appear. Your baby is still a tiny cluster of cells implanting in the womb.
- Weeks 5–8: Morning sickness often begins. Your baby’s heartbeat can usually be detected, and tiny facial features start forming.
- Weeks 9–12: Your bump may begin to show. At this stage, a dating scan is offered in the UK to confirm your due date more precisely.
- Weeks 13–20: Energy levels often improve. You may feel your baby’s first movements (quickening), and an anomaly scan checks your baby’s growth and development.
- Weeks 21–28: Your bump grows noticeably, and your baby can hear sounds from outside the womb. This is an exciting stage where many parents start antenatal classes.
- Weeks 29–36: You may experience Braxton Hicks contractions as your body prepares for labour. Baby gains more weight and gets into position for birth.
- Weeks 37–42: Full term. Labour could start anytime, and your due date is only an estimate — babies arrive on their own schedule.
Global Relevance of Pregnancy Due Date Calculators
While the NHS offers guidelines in the UK, similar pregnancy timelines are used worldwide, including in the US, Canada, Australia, and Europe. Many international health organisations also recommend early scans to confirm the estimated due date, but calculators remain a trusted starting point for expectant parents everywhere.
Final Thoughts
The Pregnancy Due Date Calculator is more than just a date finder — it’s a guide to understanding your pregnancy journey, helping you feel informed, reassured, and connected to your baby’s development. Use it alongside professional medical advice to prepare for one of life’s most precious experiences. Remember, every pregnancy is unique, and your healthcare team will support you with personalised care as your due date approaches.