Work out your due date, then what comes next
A due date can make everything feel suddenly real. Enter your dates to estimate when your baby may arrive, see your pregnancy week, and plan the UK milestones that tend to come next.
Your week today
See how far along you are right now.
NHS scan windows
Estimate the usual dating and anomaly scan ranges.
Leave and MATB1 dates
Keep practical work milestones in view.
This page is for general pregnancy planning and date guidance only. It is not medical advice, diagnosis, or treatment. Pregnancy dates are estimates and can change after a scan or advice from your midwife, GP, or maternity team.
If you have symptoms, concerns, or questions about your pregnancy, speak to your midwife, GP, or maternity team. For urgent help, use NHS 111; call 999 in an emergency. Read how we source and review content in our editorial policy.
Build Your UK Pregnancy Timeline
Enter a date to see your week, countdown, NHS milestone windows, and practical next steps.
Popular pregnancy calculators
Start with the date you know, then check the questions that usually follow: how far along you are, when scans may happen, and which work dates need attention.
Pregnancy Calculators UK
Browse every calculator and planning tool in one place.
Open calculator →How Many Weeks Pregnant Am I?
Turn a due date or last period date into your current pregnancy week.
Open calculator →12-Week Scan Calculator
Estimate the NHS dating scan window from your due date.
Open calculator →20-Week Scan Calculator
Estimate the usual anomaly scan window around 18 to 21 weeks.
Open calculator →Conception Date Calculator
Estimate conception from a due date, or a due date from conception.
Open calculator →Maternity Leave Calculator UK
Estimate key UK maternity leave and notice planning dates.
Open calculator →One date, a plan you can actually use
Pregnancy planning is full of dates that are easy to mix up. DueDate.Baby keeps the useful ones together without asking you to create an account first.
Week-by-week context
See baby development, body changes, and UK-focused notes for your current pregnancy week.
Explore pregnancy weeks →My Pregnancy
Keep your due date saved locally and follow your countdown, scan windows, and stage-specific checklist.
Open My Pregnancy →UK resources
Find NHS, maternity rights, financial support, and trusted pregnancy information in one place.
View UK resources →Trust built in from the start
No calculator can tell the whole story of a pregnancy. This one is designed to be useful, careful, and clear about what it can and cannot do.
Clear about its limits
The calculator explains that dates are estimates and should be checked with your NHS dating scan or maternity team.
Built around UK timing
Scan windows, MATB1 timing, maternity leave prompts, and week guides are written for UK pregnancy planning.
Private by default
You can use the calculator without an account. Saved tracker dates stay in your browser.
Source-led pages
Key planning pages link out to NHS and GOV.UK guidance so you can check the official wording when it matters.
Helpful reads for the next question
Once you have a date, the next questions are usually about accuracy, care appointments, and work. These guides go deeper than the calculator.
How Accurate Is a Due Date Calculator?
Wondering whether your due date is correct? Learn how due date calculators work, how accurate they are, and why your estimated due date may change during pregnancy.
Read guide →Your First Trimester Roadmap: Midwives, Scans, and Care Options
The first 12 weeks in the UK maternity system: how to register for care, what happens at your booking appointment, navigating NHS vs private options, and the 12-week dating scan.
Read guide →Navigating Your Pregnancy Career: UK Rights, Pay, and Timing
Navigating the intersection of career and pregnancy in the UK can feel like a maze of acronyms and legal deadlines. Here is a breakdown of your essential rights.
Read guide →Due date calculator FAQs
Is this the same as my NHS due date?
No. The calculator gives an estimate based on the dates you enter. Your NHS dating scan and maternity team should confirm or update your official estimated due date.
Can my due date change after a scan?
Yes. It is common for the estimated due date to be confirmed or adjusted after a dating scan, especially if the scan measurements do not match the date from your last period.
What if I do not know the first day of my last period?
Use another date you know, such as a conception date if available, or wait for your dating scan. If your dates are uncertain, treat every calculator result as a rough planning guide.
Does this replace advice from my midwife or GP?
No. DueDate.Baby is a planning tool, not medical advice. Always follow advice from your midwife, GP, maternity unit, or NHS care team.
What does the timeline show?
It estimates your pregnancy week and day, trimester, countdown, common NHS scan windows, antenatal milestone timing, and practical UK planning prompts based on your date.
Do I need an account?
No. The calculator works without an account. If you save a due date for the tracker, it is stored locally in your browser.
What if I already know my due date?
Use the tracker or pregnancy timeline page to save your estimated due date and follow the same UK milestone planning flow.