Tuulo

Due date calculator

Get your estimated due date and how many weeks along you are.

Everything happens in your browser: your files are never uploaded to a server.

Estimated due date

Estimate for guidance. Always follow your doctor's advice.

How to use it

  1. Enter the first day of your last period.
  2. Adjust your cycle length.
  3. See the due date and week.

FAQ

Is it exact?

It is an estimate (Naegele's rule): only about 5% of babies arrive that day. Your doctor or midwife will confirm with an ultrasound.

More tools