> my house eats 100kg of rice in a month

What’s the maths on that? A cup of rice would seem a fair bit for a person for a meal. A cup is about 200g.

That’s 500 portions a month. 5.5 people for 3 meals a day?

A lot of Asian households are multi-generational, so the maths definitely checks out there.

I'm putting my money on more people (8-10) but eating less than 200g per meal (1/2 cup uncooked, ~100g for most people)

EDIT, just saw sibling, that's impressive for 5 people, unless the dogs eat a lot of rice too.

It fluctuates but on average maybe 5 humans and 10 dogs.