0.8 mg/mL · 800 mcg/mL · 8 mcg per U-100 unit

2 mg vial + 2.5 mL bacteriostatic water

A 2 mg vial reconstituted with 2.5 mL comes to 0.8 mg/mL. Every unit on a U-100 insulin syringe then carries 8 mcg, so 100 mcg is 12.5 units (0.13 mL) and the vial holds 20 draws of that size.

Units for each amount

2 mg vial + 2.5 mL = 0.8 mg/mL (800 mcg/mL, 8 mcg per unit on U-100)
Dose	mL	U-100 units	U-40 units	Doses per vial
50 mcg	0.063	6.3	2.5	40
100 mcg	0.13	12.5	5	20
150 mcg	0.19	18.7	7.5	13
200 mcg	0.25	25	10	10
250 mcg	0.31	31.3	12.5	8
300 mcg	0.37	37.5	15	6
400 mcg	0.5	50	20	5
500 mcg	0.63	62.5	25	4
750 mcg	0.94	93.8	37.5	2
1 mg	1.25	125	50	2
1.5 mg	1.88	187.5	75	1
2 mg	2.5	250	100	1

Same vial, other volumes

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

Water	mg/mL	mcg per unit	100 mcg =
0.5 mL	4	40	2.5 units	table →
1 mL	2	20	5 units	table →
1.5 mL	1.333	13.33	7.5 units	table →
2 mL	1	10	10 units	table →
2.5 mL	0.8	8	12.5 units
3 mL	0.667	6.67	15 units	table →

Try other numbers

2 mg + 2.5 mL questions

What concentration is 2 mg in 2.5 mL?

2 mg divided by 2.5 mL is 0.8 mg/mL, which is 800 mcg/mL. On a U-100 syringe each unit holds 0.01 mL, so one unit carries 8 mcg.

How many units is 100 mcg from a 2 mg vial with 2.5 mL?

100 mcg divided by 800 mcg/mL is 0.13 mL, which is 12.5 units on a U-100 syringe and 5 units on a U-40 syringe. The vial holds 20 draws of that size.

What if I add 3 mL instead of 2.5 mL to the 2 mg vial?

The mass stays 2 mg. With 3 mL the concentration is 0.667 mg/mL instead of 0.8 mg/mL, so the same amount per draw needs more units: 100 mcg becomes 15 units instead of 12.5.

Does a 2 mg vial hold 2.5 mL?

Usually. Most lyophilized peptide vials are 2 mL or 3 mL glass, and 2.5 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.

1Licensed Peptides two accredited labs on every lot, certificates public, card and Apple Pay checkout
2Core Peptides long track record, public certificates, wide catalog
3Ascension Peptides public third-party testing, clear pricing