Math problem for dosage

Ok guys, math was never my strong suite, so please help if u can. Im on trt and well versed in the dosages. My doc recommended a peptide to try. The bottle contains 2mg of the peptide. I added 4 ml of water as recommended. Dosage is 250mcg. I have normal 1cc insulin needles. .1 ml - 1.0 numbers on syringe with 5 tick marks between numbers. I have been drawing out .25ml (halfway between 2 and 3 numbers on syringe. I think this may be too much and not 250mcg. Thanks in advance. The Coyote

2mg = 2000mcg

2000mcg/4ml means 1000mcg/2ml means 500mcg/1ml means 250mcg/0.5ml

Draw to 0.5ml and inject.
You will get 8 injections out of your bottle.
8 x 250mcg = 2000mcg

Thank you sir