PeptideCalculations
0.667 mg/mL · 667 mcg/mL · 6.67 mcg per U-100 unit

2 mg vial + 3 mL bacteriostatic water

A 2 mg vial reconstituted with 3 mL comes to 0.667 mg/mL. Every unit on a U-100 insulin syringe then carries 6.67 mcg, so 100 mcg is 15 units (0.15 mL) and the vial holds 20 draws of that size.

Units for each amount

2 mg vial + 3 mL = 0.667 mg/mL (667 mcg/mL, 6.67 mcg per unit on U-100)
DosemLU-100 unitsU-40 unitsDoses per vial
50 mcg0.0757.5340
100 mcg0.1515620
150 mcg0.2322.5913
200 mcg0.3301210
250 mcg0.3837.5158
300 mcg0.4545186
400 mcg0.660245
500 mcg0.7575304
750 mcg1.13112.5452
1 mg1.5150602
1.5 mg2.25225901
2 mg33001201

Same vial, other volumes

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

Watermg/mLmcg per unit100 mcg =
0.5 mL4402.5 unitstable →
1 mL2205 unitstable →
1.5 mL1.33313.337.5 unitstable →
2 mL11010 unitstable →
2.5 mL0.8812.5 unitstable →
3 mL0.6676.6715 units

Same concentration, different vial

These pairs also come to 0.667 mg/mL, so their unit counts match this page exactly; only the number of draws per vial differs: 1 mg + 1.5 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

2 mg + 3 mL questions

What concentration is 2 mg in 3 mL?

2 mg divided by 3 mL is 0.667 mg/mL, which is 667 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 6.67 mcg.

How many units is 100 mcg from a 2 mg vial with 3 mL?

100 mcg divided by 667 mcg/mL is 0.15 mL, which is 15 units on a U-100 syringe and 6 units on a U-40 syringe. The vial holds 20 draws of that size.

What if I add 0.5 mL instead of 3 mL to the 2 mg vial?

The mass stays 2 mg. With 0.5 mL the concentration is 4 mg/mL instead of 0.667 mg/mL, so the same amount per draw needs fewer units: 100 mcg becomes 2.5 units instead of 15.

Does a 2 mg vial hold 3 mL?

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

Brands we recommendIndependent. No affiliation with any brand, no affiliate links, no referral codes, no paid placements.
  1. 1Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
  2. 2Core Peptides long track record, public certificates, wide catalog
  3. 3Ascension Peptides public third-party testing, clear pricing