Due Date Calculator
Enter the first day of your last period and we'll tell you the day your baby is due, and how many weeks pregnant you are today.
Your due date
Step 1 of 2
Who's counting down?
This is the Little Countdown calendar. Answer its two questions and it turns to your page.
You'll get
- Your due date.
- How many weeks pregnant you are today.
- How big your baby is this week.
- The date each trimester starts.
Don't know the date of your last period? You can use a conception date, an IVF transfer date or a due date you've already been given.
- 4 × 4 inches
- 224 tear-off pages
- Glued at the top like a notepad
- Wooden stand
The calendar is real, and it's for sale.
224 tear-off pages, 4 inches square, on a solid wood stand.
She sent you this page as a hint.
Every page gives you the days left, how big your baby is this week, and one line you haven't read before. No two pages are the same.
- There's a page for every day from week 8 until the due date. That's 224 pages.
- Every page has something different on it.
- If the due date changes after an ultrasound, tear off a few pages or wait a few days, then carry on.
In the box: the calendar, the wooden stand, and your note on a card if you add one.
Your key dates
What's on every page
- How many days are leftIn numbers big enough to read from across the room.
- The week and day of the pregnancySo you can answer when people ask how far along you are.
- How big the baby isCompared with a fruit: a raspberry at 8 weeks, a lime at 12, a watermelon by 36.
- Something about the baby that dayIt's different on every page. Today's says: “”
How big the baby is, week by week
From a poppy seed in week 4 to a small pumpkin in week 40.
Grandparents count the days too.
What buyers say
These are examples to show how reviews would look here. They are not real customers, and this section is not in the site files.
212 reviews (example figures)
Not buying today? We'll email you your dates.
You'll get your due date and the other key dates straight away, then a short email each week telling you how big the baby is. It's free and you can stop it whenever you like.
How we work out the due date
From a last period
We add 280 days, which is 40 weeks, to the first day of the last period. If the cycle isn't 28 days, we move the date by the difference.
From conception or IVF
From a conception date we add 266 days. From an IVF transfer we add 261 days for a day-5 embryo and 263 for a day-3 embryo.
It's an estimate
Only about 1 baby in 20 arrives on the due date itself. A doctor or midwife may move the date after the first ultrasound. If they do, come back and change it here.
Common questions
Can the due date change?
Yes. It often moves by a few days after the first ultrasound, when the baby is measured. If yours does, come back and change it here.
What do you do with my dates?
Your dates stay on your device. We keep a count of how many visitors are at each week of pregnancy, with no name, email or exact date attached. We store a due date with an email address only if you ask us to email you. We never sell either, and we never pass them to advertisers.
Is this medical advice?
No. It's a date calculator. For anything about your health or the pregnancy, ask your doctor or midwife.
Questions about the calendar
Is this a real calendar?
What if the due date changes after I've bought it?
That happens a lot after the first ultrasound. The pages count the days that are left, not the date, so you tear off a few extra pages or wait a few days until you're back on the right one.
I've only just found out. Is it too early?
No. The calendar starts 224 days before the due date, which is week 8, so it will be waiting for you. If you change your mind for any reason, send it back within 30 days and we'll refund you.
Why not just use an app?
Because everyone in the house can see this. An app is on one person's phone. The calendar sits on a shelf where your partner, your mother and your visitors all watch the number go down.
Can I send it as a present?
Yes. Give us their address and write a note. We'll print the note on a card and put it in the box.