PeptideCalculations
5 mg/mL · 5,000 mcg/mL · 50 mcg per U-100 unit

10 mg vial + 2 mL bacteriostatic water

A 10 mg vial reconstituted with 2 mL comes to 5 mg/mL. Every unit on a U-100 insulin syringe then carries 50 mcg, so 500 mcg is 10 units (0.1 mL) and the vial holds 20 draws of that size.

Units for each amount

10 mg vial + 2 mL = 5 mg/mL (5,000 mcg/mL, 50 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0110.4200
100 mcg0.0220.8100
150 mcg0.0331.266
200 mcg0.0441.650
250 mcg0.055240
300 mcg0.0662.433
400 mcg0.0883.225
500 mcg0.110420
750 mcg0.1515613
1 mg0.220810
1.5 mg0.330126
2 mg0.440165
2.5 mg0.550204
5 mg1100402
10 mg2200801

Same vial, other volumes

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

Watermg/mLmcg per unit500 mcg =
0.5 mL202002.5 unitstable →
1 mL101005 unitstable →
1.5 mL6.66766.677.5 unitstable →
2 mL55010 units
2.5 mL44012.5 unitstable →
3 mL3.33333.3315 unitstable →
5 mL22025 unitstable →

Same concentration, different vial

These pairs also come to 5 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 5 mg + 1 mL, 15 mg + 3 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

10 mg + 2 mL questions

What concentration is 10 mg in 2 mL?

10 mg divided by 2 mL is 5 mg/mL, which is 5,000 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 50 mcg.

How many units is 500 mcg from a 10 mg vial with 2 mL?

500 mcg divided by 5,000 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 10 mg vial?

The mass stays 10 mg. With 2.5 mL the concentration is 4 mg/mL instead of 5 mg/mL, so the same amount per draw needs more units: 500 mcg becomes 12.5 units instead of 10.

Does a 10 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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