PeptideCalculations
6 mg/mL · 6,000 mcg/mL · 60 mcg per U-100 unit

3 mg vial + 0.5 mL bacteriostatic water

A 3 mg vial reconstituted with 0.5 mL comes to 6 mg/mL. Every unit on a U-100 insulin syringe then carries 60 mcg, so 250 mcg is 4.2 units (0.042 mL) and the vial holds 12 draws of that size.

Units for each amount

3 mg vial + 0.5 mL = 6 mg/mL (6,000 mcg/mL, 60 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.00830.830.3360
100 mcg0.0171.70.6730
150 mcg0.0252.5120
200 mcg0.0333.31.315
250 mcg0.0424.21.712
300 mcg0.055210
400 mcg0.0676.72.77
500 mcg0.0838.33.36
750 mcg0.1312.554
1 mg0.1716.76.73
1.5 mg0.2525102
2 mg0.3333.313.31
2.5 mg0.4241.716.71

Same vial, other volumes

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

Watermg/mLmcg per unit250 mcg =
0.5 mL6604.2 units
1 mL3308.3 unitstable →
1.5 mL22012.5 unitstable →
2 mL1.51516.7 unitstable →
2.5 mL1.21220.8 unitstable →
3 mL11025 unitstable →
5 mL0.6641.7 unitstable →

Same concentration, different vial

These pairs also come to 6 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 15 mg + 2.5 mL, 30 mg + 5 mL.

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

3 mg + 0.5 mL questions

What concentration is 3 mg in 0.5 mL?

3 mg divided by 0.5 mL is 6 mg/mL, which is 6,000 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 60 mcg.

How many units is 250 mcg from a 3 mg vial with 0.5 mL?

250 mcg divided by 6,000 mcg/mL is 0.042 mL, which is 4.2 units on a U-100 syringe and 1.7 units on a U-40 syringe. The vial holds 12 draws of that size.

What if I add 1 mL instead of 0.5 mL to the 3 mg vial?

The mass stays 3 mg. With 1 mL the concentration is 3 mg/mL instead of 6 mg/mL, so the same amount per draw needs more units: 250 mcg becomes 8.3 units instead of 4.2.

Does a 3 mg vial hold 0.5 mL?

Usually. Most lyophilized peptide vials are 2 mL or 3 mL glass, and 0.5 mL fits with room to swirl. Check the vial if it is an unusually small format.

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