Pregnancy calculator

This calculator provides an estimation of your pregnancy schedule as well as related information based on the date you provide.



Enter the date of the first day of your last menstrual period (LMP):



Probable date of conception:


Foetal Age Today:


Best date range for NT scan:


(12 weeks 3 days to 13 weeks 3 days)

Morphology Scan Date:


(19 weeks)

First Heart Tones by Doppler:


(11 to 12 weeks)

Best time to evaluate cervical length in patient with risk factors:


Best time for routine anatomy ultrasound:


(18 to 20 weeks)

Estimated Due Date:



It can also be used to determine the ideal timeframe to book a Nuchal Translucency and Morphology scan.
- For the NT scan, the best window is from 11 weeks and 6 days to 13 weeks and 6 days (CRL 45-84mm), but to get the clearest view of the foetal bladder and heart, the optimal time frame is 12 weeks and 3 days to 13 weeks and 3 days.
- For the Morphology scan, it is best to schedule it after 19 weeks but before 22 weeks.

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