PeptideCalculations
2.5 mg/mL · 2,500 mcg/mL · 25 mcg per U-100 unit

5 mg vial + 2 mL bacteriostatic water

A 5 mg vial reconstituted with 2 mL comes to 2.5 mg/mL. Every unit on a U-100 insulin syringe then carries 25 mcg, so 250 mcg is 10 units (0.1 mL) and the vial holds 20 draws of that size.

Units for each amount

5 mg vial + 2 mL = 2.5 mg/mL (2,500 mcg/mL, 25 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0220.8100
100 mcg0.0441.650
150 mcg0.0662.433
200 mcg0.0883.225
250 mcg0.110420
300 mcg0.12124.816
400 mcg0.16166.412
500 mcg0.220810
750 mcg0.330126
1 mg0.440165
1.5 mg0.660243
2 mg0.880322
2.5 mg1100402
5 mg2200801

Same vial, other volumes

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

Watermg/mLmcg per unit250 mcg =
0.5 mL101002.5 unitstable →
1 mL5505 unitstable →
1.5 mL3.33333.337.5 unitstable →
2 mL2.52510 units
2.5 mL22012.5 unitstable →
3 mL1.66716.6715 unitstable →
5 mL11025 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

5 mg + 2 mL questions

What concentration is 5 mg in 2 mL?

5 mg divided by 2 mL is 2.5 mg/mL, which is 2,500 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 25 mcg.

How many units is 250 mcg from a 5 mg vial with 2 mL?

250 mcg divided by 2,500 mcg/mL is 0.1 mL, which is 10 units on a U-100 syringe and 4 units on a U-40 syringe. The vial holds 20 draws of that size.

What if I add 2.5 mL instead of 2 mL to the 5 mg vial?

The mass stays 5 mg. With 2.5 mL the concentration is 2 mg/mL instead of 2.5 mg/mL, so the same amount per draw needs more units: 250 mcg becomes 12.5 units instead of 10.

Does a 5 mg vial hold 2 mL?

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

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