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

50 mg vial + 5 mL bacteriostatic water

A 50 mg vial reconstituted with 5 mL comes to 10 mg/mL. Every unit on a U-100 insulin syringe then carries 100 mcg, so 5 mg is 50 units (0.5 mL) and the vial holds 10 draws of that size.

Units for each amount

50 mg vial + 5 mL = 10 mg/mL (10,000 mcg/mL, 100 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0050.50.21000
100 mcg0.0110.4500
150 mcg0.0151.50.6333
200 mcg0.0220.8250
250 mcg0.0252.51200
300 mcg0.0331.2166
400 mcg0.0441.6125
500 mcg0.0552100
750 mcg0.0757.5366
1 mg0.110450
1.5 mg0.1515633
2 mg0.220825
2.5 mg0.25251020
5 mg0.5502010
10 mg1100405

Same vial, other volumes

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

Watermg/mLmcg per unit5 mg =
1 mL5050010 unitstable →
1.5 mL33.333333.3315 unitstable →
2 mL2525020 unitstable →
2.5 mL2020025 unitstable →
3 mL16.667166.6730 unitstable →
5 mL1010050 units

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: 5 mg + 0.5 mL, 10 mg + 1 mL, 15 mg + 1.5 mL, 20 mg + 2 mL, 30 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

50 mg + 5 mL questions

What concentration is 50 mg in 5 mL?

50 mg divided by 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 5 mg from a 50 mg vial with 5 mL?

5000 mcg divided by 10,000 mcg/mL is 0.5 mL, which is 50 units on a U-100 syringe and 20 units on a U-40 syringe. The vial holds 10 draws of that size.

What if I add 1 mL instead of 5 mL to the 50 mg vial?

The mass stays 50 mg. With 1 mL the concentration is 50 mg/mL instead of 10 mg/mL, so the same amount per draw needs fewer units: 5 mg becomes 10 units instead of 50.

Does a 50 mg vial hold 5 mL?

Not always. Many lyophilized peptide vials are 2 mL or 3 mL glass; 5 mL will not fit in those. Check the vial before choosing this volume, or split the mass across two vials.

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