Tirz calculation

I’m new to reconstituting my own solution so wanted to check on dosing. I bought 10 mg vials of tirz and 30 ml vial of bac water. My dosage of compound tirz was 5 mg or 50 units.

Does that mean I just add 1 ml of water to the powder and it’ll be 2 doses right ?

It just seems like the water to powder ratio is very small so I want to make sure it’s correct before I start.

Thanks