PeptideCalculations
1.333 mg/mL · 1,333 mcg/mL · 13.33 mcg per U-100 unit

2 mg vial + 1.5 mL bacteriostatic water

A 2 mg vial reconstituted with 1.5 mL comes to 1.333 mg/mL. Every unit on a U-100 insulin syringe then carries 13.33 mcg, so 100 mcg is 7.5 units (0.075 mL) and the vial holds 20 draws of that size.

Units for each amount

2 mg vial + 1.5 mL = 1.333 mg/mL (1,333 mcg/mL, 13.33 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0383.81.540
100 mcg0.0757.5320
150 mcg0.1111.34.513
200 mcg0.1515610
250 mcg0.1918.87.58
300 mcg0.2322.596
400 mcg0.330125
500 mcg0.3837.5154
750 mcg0.5656.322.52
1 mg0.7575302
1.5 mg1.13112.5451
2 mg1.5150601

Same vial, other volumes

The mass does not move. Only the concentration and the unit count do.

Watermg/mLmcg per unit100 mcg =
0.5 mL4402.5 unitstable →
1 mL2205 unitstable →
1.5 mL1.33313.337.5 units
2 mL11010 unitstable →
2.5 mL0.8812.5 unitstable →
3 mL0.6676.6715 unitstable →

Try other numbers

mL
Draw to
—units
— mL on a U-100, 1 mL barrel
Concentration
—mg/mL
— mcg per unit
Doses in the vial
—
of

2 mg + 1.5 mL questions

What concentration is 2 mg in 1.5 mL?

2 mg divided by 1.5 mL is 1.333 mg/mL, which is 1,333 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 13.33 mcg.

How many units is 100 mcg from a 2 mg vial with 1.5 mL?

100 mcg divided by 1,333 mcg/mL is 0.075 mL, which is 7.5 units on a U-100 syringe and 3 units on a U-40 syringe. The vial holds 20 draws of that size.

What if I add 2 mL instead of 1.5 mL to the 2 mg vial?

The mass stays 2 mg. With 2 mL the concentration is 1 mg/mL instead of 1.333 mg/mL, so the same amount per draw needs more units: 100 mcg becomes 10 units instead of 7.5.

Does a 2 mg vial hold 1.5 mL?

Usually. Most lyophilized peptide vials are 2 mL or 3 mL glass, and 1.5 mL fits with room to swirl. Check the vial if it is an unusually small format.

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