How can I weight my baby at home ?

So my baby is on Medicaid and they don’t do one month appointments they just do like 1 week, 2 week, 2 mo, 4 mo, and so on. I’m not sure if other regular insurances only cover those too but in the mean time I would like to be able to weigh my baby ? he was 7lbs at 2 weeks.

He’s 3 weeks and 3 days now, am going nuts trying to figure out if he’s gaining weight or not ?!

He feels a tiny bit heavier but really I would like to know what he weighs 😐