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

Gestation Calculator

Work out your treatment options
Abortion in Ireland and Northern Ireland

Marie Stopes UK has been providing unplanned pregnancy services for Irish women for over 40 years. Every year, 2,500 women travel to one of our 70 abortion clinics in the UK to access treatment.

Please visit our dedicated Irish website www.mariestopes.ie for more information.

We provide:

  • Discounted fees for Irish women
  • Funded abortion care for women from Northern Ireland travelling to England. Find out more. 
  • Free Taxi Transfers from and to the airport or ferry port when travelling from Ireland or Northern Ireland to a Marie Stopes UK Clinic or Centre 
  • Fast appointments and same-day consultation and treatment
  • Safe, confidential and non-judgmental advice to assess your options if you are pregnant
  • Medical abortion treatment for up to 9 weeks. Surgical abortion treatment for up to 24 weeks in England.

Please fill in our webform and we will respond to your enquiry as early as we can.