How many units is 500 mcg from a 10 mg vial with 3 mL of water?
10 mg ÷ 3 mL = 3.333 mg/mL (3333.333 mcg/mL). 500 mcg ÷ 3333.333 mcg/mL = 0.15 mL. On a U-100 syringe that is 15 units (U-50: 7.5, U-40: 6). The vial holds 20 draws of that size.
The math
Concentration = 10 mg ÷ 3 mL = 3.333 mg/mL Volume = 500 mcg ÷ 3333.333 mcg/mL = 0.15 mL Units (U-100) = 0.15 × 100 = 15
Math only, not medical advice. This page converts numbers; it does not recommend any compound or amount.
Draw to
15 units
= 0.15 mL · concentration 3.333 mg/mL (3333.3 mcg/mL) · 20 draws per vial
Concentration = 10 mg ÷ 3 mL = 3.3333 mg/mL Volume = 500 mcg ÷ 3333.33 mcg/mL = 0.15 mL Units = 0.15 mL × 100 (U-100) = 15 units
Math only, not medical advice. Verify every number yourself.