Calculate your baby's estimated due date using the calculator below.  The calculator assumes an average gestation of 40 weeks from LMP and an ovulation date of cycle day 14.  If you know you ovulated earlier or later than cycle day 14 then you can adjust the date given by the calculator by adding or subtracting eg. if you know you ovulated on cycle day 18, then add four days to the result given by the calculator.

Remember that due dates are just an estimate of when your baby will arrive.  Only about 5% of babies arrive on their estimated due date.  And the average gestation for first time Mums is 41 weeks 1 day.