Help.. Almost 23 weeks, what is this in months???

Kealy • Wed, Jul 25 • Mother, wife, pregnant with baby number 2, and already have a 4 year old son.. I was diagnosed with endometriosis in January and was told it would be difficult to conceive naturally again, so this pregnancy was a very happy shock.

This may sound silly but I can’t get my head around, the weeks and months. I’m 22.5 weeks, and trying to figure out how many’s I am???