MailOnline’s fun new calculator estimates when you were conceived – and tells you what was top of the charts that same week!
Simply enter your birthday to find out.
Based on pregnancy typically lasting 280 days from the first day of your last period, our tool tracks back in time to pinpoint a rough conception date-range.
It also factors in whether you arrived early or late.
Because it’s based on assumptions, the calculator can’t conclusively state when you were conceived. It only acts as a guide.
Obstetricians say it’s near impossible to identify your exact ‘C-day’.
The NHS uses an estimated due date calculator which uses the first day of your last period combined with your menstrual cycle to determine your ‘estimated due date’.
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Although we might think sperm fertilises the egg within minutes of ejaculation, that’s not always true. Sperm can survive inside a woman’s reproductive tract for up to five days after sex.
Ovulation must also be taken into account, and every woman’s cycle can differ.
According to the UK’s National Health Service, the average length of a pregnancy is 280 days.
And only 5 per cent of babies appear on their actual due date.
The Royal College of Obstetricians and Gynaecologists advise that, in the UK a mixture of Naegele’s Rule and measuring a baby from top of the head to the bottom using an ultrasound to estimate the due date.
Naegele’s rule involves taking the first date of the last menstrual period, adding seven days to that date and then adding on a further nine months.
The majority of babies are born within a five day range of their estimated due date.
Other inaccuracies can creep in if a woman has an irregular or cannot remember the date of their last period.
Medical conditions can also lead to a premature delivery.
Built with data on the charts dating back to the 1950s, our tool also reveals the most popular tunes at the time you were conceived.
Anyone born between mid-April and early August 1992 will share the biggest Number 1 in history.
Bryan Adams’ record breaking (Everything I Do) I Do It For You spent 16 weeks at the top between June and November 1991.
In 1994, another love song spent the entire summer at Number 1, with Wet Wet Wet’s version of Love Is All Around.
Our previous calculator looked at the most common birth dates in England and Wales as measured by the Office for National Statistics.
It showed that September 27 is the most popular date of birth, with on average 1,944 babies being born between 1995 and 2023. The least favourite date, according to the statistics, is December 26, with the birthdate falling to on average 1,310 births.
