Pregnancy Calculator

Last updated: April 2026

First day of last period

Average cycle length

days

Pregnancy summary

8 October 2026

Due date

Gestational age

19 weeks 4 days

Trimester

Second trimester

Estimated conception date

15 January 2026

Days remaining

143 days

Progress48.9%

Medical note

This calculator provides an estimate only. Pregnancy dates and health guidance should be confirmed with a qualified healthcare professional.

Related calculators:

Due Date Calculator
Pregnancy Conception Calculator
Pregnancy Weight Gain Calculator
Ovulation Calculator

What does a pregnancy calculator show?

A pregnancy calculator estimates your due date, gestational age, trimester, possible conception date, days pregnant, and days remaining.

How pregnancy weeks are counted

Pregnancy weeks are usually counted from the first day of your last menstrual period, not from the day of conception.

Why due dates are estimates

Cycle length, ovulation timing, and dating scans can shift the estimated due date. Clinical dating from a healthcare professional may differ from this calculator.

What does this mean?

This calculator is designed to help you understand the likely number before you make a decision or start an application.

Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.

Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.