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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Why choose Marie Stopes?

Marie Stopes UK private abortion care services

Whatever your decision, we'll help you every step of the way. 

Marie Stopes is the UK's leading provider of sexual and reproductive health services. We're the largest abortion care charity in the UK and help over 65,000 women a year. We offer a full range of abortion services for women in over 60 Marie Stopes clinics and centres throughout the UK. Our specialist staff are on hand 24/7 to offer expert advice and support – from your initial consultation to treatment aftercare. Our approach is to provide women and men with a discreet and fully confidential service delivered by our dedicated and experienced team of nurses and doctors. Clinical care is at the heart of everything we do.

Our centres provide: 

  • Fast, convenient appointments. Same-day consultation. (Monday-Friday if you call before 09:00pm and at week ends depending on availability).
  • Confidential, non-judgemental advice, care and treatment
  • Expertise - over 140,000 operations performed every year adhering to CQC guidelines
  • 24 hour abortion advice and booking service line
  • 24 hour aftercare advice and support from healthcare professionals
  • We can also offer a telephone abortion consultation service, where you can arrange to have an initial abortion consultation over the phone with an experienced healthcare professional at a time that suits you.
  • Same day consultation and treatment available in some locations
  • Free counselling before and after any of our services if you have booked an appointment with us


Book your consultation

Call us anytime on 0345 300 1202 (24hrs). We can answer all of your questions and arrange a convenient appointment.

Where the money goes 

As we are part of the world's largest reproductive and sexual health charity, we invest any surplus we make back into programmes we run through the International Marie Stopes centres. Marie Stopes International helps over 8 million women world-wide every year. Find out more.