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

0345 300 8090

Service Update

“Marie Stopes International, the British Pregnancy Advisory Service (BPAS) and NHS England are working together to help ensure that women who need an abortion can access services as quickly as possible. 

“There is currently high demand for our services so as a temporary measure, Marie Stopes may offer appointments further away from home or with an alternative provider to bring waiting times down.

“It’s important to note that we are continuing to monitor demand for services and are taking steps to address the pressures as quickly as possible. Meanwhile, women should continue to receive a supported and smooth service. There are highly qualified staff at our call centres who will help ensure women can make informed decisions about all possible treatments.

“If you have concerns please call Marie Stopes 0345 300 8090 or BPAS 03457 30 40 30  for more information.”

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Notes to Editors

For further information, please contact:

Email: press@mariestopes.org.uk 

Telephone: 0203 219 8245 / 07769 166 516

About Marie Stopes UK

Marie Stopes UK is the leading independent provider of sexual and reproductive health services. Every year more than 70,000 women and men come to our centres for information, advice, professional care and support.  In addition to these face-to-face consultations, our 24hr confidential helpline One Call (0345 300 8090) offers advice or counselling day or night and last year received more than 300,000 calls.

Choice is fundamental to everything we do, and we respect the right of a woman to decide whether and when to have children. To achieve this we believe that all women should have access to comprehensive sexual health services, and that these services should be of the highest quality.