If i turn off my cellular data and connect to my Wi-Fi at my house with i still be using my data?

I have an iphone 7 btw if you are wondering

No. You'll be using your home Wi-Fi. Why aren't you using your home Wi-Fi in the first place. It's a lot faster than lte.

I don't care what phone you have.

If you turn off your data, you won't be using your data.

I don't have to worry about that as I have unlimited data but I don't believe it uses your data if you are connected to Wi-Fi

Well no. You turned off your data, so it wouldn't work. Even if you didn't just connecting to your Wi-Fi would mean that is used, not the data.

No sure won't cause the data will be off

No you would using Wi-Fi.