Confused by how many weeks you say you are?

Anna • 💕 Baby girl #1 born 2/26/2016 Baby girl #2 born 3/2/2019 💕
Ok so this will sound really dumb, but have you read on some of the Glow articles or online that if you are 9 weeks 3 days, you would say you are in your tenth week of pregnancy? Or 10 weeks 1 day would be eleven weeks? Today I am 10 weeks exactly on this app (so 10w1d tomorrow). So would you say I'm currently in my tenth week or eleventh week if someone were to ask? The articles have confused me. How do you guys do this? My mind is blown.