PeptideCalculations
10 mg/mL · 10,000 mcg/mL · 100 mcg per U-100 unit

5 mg vial + 0.5 mL bacteriostatic water

A 5 mg vial reconstituted with 0.5 mL comes to 10 mg/mL. Every unit on a U-100 insulin syringe then carries 100 mcg, so 250 mcg is 2.5 units (0.025 mL) and the vial holds 20 draws of that size.

Units for each amount

5 mg vial + 0.5 mL = 10 mg/mL (10,000 mcg/mL, 100 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0050.50.2100
100 mcg0.0110.450
150 mcg0.0151.50.633
200 mcg0.0220.825
250 mcg0.0252.5120
300 mcg0.0331.216
400 mcg0.0441.612
500 mcg0.055210
750 mcg0.0757.536
1 mg0.11045
1.5 mg0.151563
2 mg0.22082
2.5 mg0.2525102
5 mg0.550201

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 units
1 mL5505 unitstable →
1.5 mL3.33333.337.5 unitstable →
2 mL2.52510 unitstable →
2.5 mL22012.5 unitstable →
3 mL1.66716.6715 unitstable →
5 mL11025 unitstable →

Same concentration, different vial

These pairs also come to 10 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 10 mg + 1 mL, 15 mg + 1.5 mL, 20 mg + 2 mL, 30 mg + 3 mL, 50 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

5 mg + 0.5 mL questions

What concentration is 5 mg in 0.5 mL?

5 mg divided by 0.5 mL is 10 mg/mL, which is 10,000 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 100 mcg.

How many units is 250 mcg from a 5 mg vial with 0.5 mL?

250 mcg divided by 10,000 mcg/mL is 0.025 mL, which is 2.5 units on a U-100 syringe and 1 units on a U-40 syringe. The vial holds 20 draws of that size.

What if I add 1 mL instead of 0.5 mL to the 5 mg vial?

The mass stays 5 mg. With 1 mL the concentration is 5 mg/mL instead of 10 mg/mL, so the same amount per draw needs more units: 250 mcg becomes 5 units instead of 2.5.

Does a 5 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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