Gestation Calculator

This calculator has been designed to give you an idea of the treatment options available to you*. If you decide to have an abortion with Marie Stopes UK, one of our nurses will give a more approximate gestation date during your appointment by way of a scan.
*Please note that this online calculator will only give you an estimated gestation based on the details you have provided.

Please select the first day of your last menstrual period.



We are here to support you 24 hours a day, 7 days a week

Call us now on 0345 300 8090 or email services@mariestopes.org.uk

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Useful contact information if you live in Ireland or Northern Ireland

It is legal for Irish women to travel to another country in order to have access to safe and legal abortion treatment. They can however receive support from organisations in Northern Ireland and the republic of Ireland.

Reproductive Choices, Dublin. 

Tel: 1 830 0630 www.reproductivechoices.ie Reproductive Choices is a specialist private sexual health clinic providing face-to-face consultations including medical assessment, blood test, ultrasound dating scan as well as information and aftercare appointments in Dublin. Telephone consultations are available from any location in Ireland.

Irish Family Planning Association (IFPA) 

Tel: 1850 49 50 51 https://www.ifpa.ie/  The Irish Family Planning Association, IFPA is a voluntary organization pioneering reproductive health and rights in Ireland. They offer information and practical advice.

Well Women Centre 

Tel: 1 872 8051, 1 660 9860, 1 848 4511 http://wellwomancentre.ie/ 3 locations in Dublin. 


Abortion Support Network

00 44 7897 611 593. Help with travel costs and overnight accommodation

Positive Options

Crisis pregnancy services.

One Family.

Tel: 1890 66 22 12. Provides support and help for single parents. 

Adoption Authority of Ireland.

Tel: 01 230 9300. Provides information on adoption.

Irish Foster Care Association.

Tel: 01 459 9474. Provides information on fostering.


Need to talk about your options with Marie Stopes UK?

Our specialist staff are on hand 24/7 to offer expert advice and support – from your initial consultation to treatment aftercare.

Call us now on 0345 300 3737 (callers from Northern Ireland) or 1 800 200 374 (Free phone for callers from the Republic of Ireland) or email services@mariestopes.org.uk.