Peptide Vial Math

IGF-1 LR3 dosage calculator

1 mg + 1 mL = 1 mg/mL, so 50 mcg is 0.05 mL, or 5 units on a U-100 syringe. Change the vial, the water or the amount and the syringe updates.

Also called: Long R3 IGF-1, LR3-IGF-1, IGF-1 LR3 dosage calculator, IGF-1 LR3 reconstitution calculator.

By Peptide Vial Math Editorial Team Reviewed by the team on (how we review) Updated Formulas unit-tested (methodology)

IGF-1 LR3 reconstitution calculator

Vial mg, water mL and amount give syringe units

mg

Total printed on the vial label.

mL

Diluent volume you add (1 mL = 100 units on a U-100 syringe).

Amount unit

The mass you want in one draw. 1 mg = 1,000 mcg.

Syringe barrel
Show U-40 and U-50 syringes

Result

5units

to draw on a U-100 syringe, 100-unit barrel

Vial: 1 mg with 1 mL diluent 1 mg +1 mL
Syringe filled to 5.0 of 100 units 0 10 20 30 40 50 60 70 80 90 100 U-100, 1 mL
Volume
0.05 mL
Concentration
1 mg/mL
Per unit
10 mcg
Draws per vial
20

1 mg + 1 mL = 1 mg/mL, so 50 mcg is 0.05 mL, or 5 units on a U-100 syringe.

  • 5 units falls between tick marks. The nearest mark, 6 units, holds 0.06 mg.

Arithmetic only. Not a dosing recommendation. Check every figure against your vial label and lab protocol.

How many units is each IGF-1 LR3 amount?

At 1 mg + 1 mL (1 mg/mL) on a U-100 syringe:

Generated from the calculator's own functions. Rows are evenly spaced reference amounts, not suggested amounts. Amber readings don't fit a 100-unit barrel.

IGF-1 LR3: 1 mg + 1 mL = 1 mg/mL, U-100 syringe
AmountmgVolume (mL)Syringe units
10 mcg 0.01 0.01 1
20 mcg 0.02 0.02 2
30 mcg 0.03 0.03 3
40 mcg 0.04 0.04 4
50 mcg 0.05 0.05 5
60 mcg 0.06 0.06 6
80 mcg 0.08 0.08 8
100 mcg 0.1 0.1 10
Engraving of glass burettes, one with a dark strip behind its graduation to make the tick marks easier to read
A burette with a dark strip behind its graduation, 1895. Pick a water volume that lands your reading on a printed mark. Public domain.

How much water for each IGF-1 LR3 vial size?

IGF-1 LR3 is sold in one common size (1 mg). The same water volume gives a different concentration in each, so the same reading means a different amount. Each cell shows mcg per unit with mg/mL in brackets.

IGF-1 LR3: mcg per U-100 unit (mg/mL in brackets) by vial size and water added
Vial0.5 mL1 mL2 mL
1 mg 20 (2)10 (1)5 (0.5)

How much bacteriostatic water for a 1 mg IGF-1 LR3 vial?

0.5 mL → 2 mg/mL, so 50 mcg is 2.5 units. 1 mL → 1 mg/mL, so 50 mcg is 5 units. 2 mL → 0.5 mg/mL, so 50 mcg is 10 units. The whole vial holds 20 draws of 50 mcg.

Worked example: 1 mg vial, 1 mL, 50 mcg

  1. Concentration. 1 mg ÷ 1 mL = 1 mg/mL (1,000 mcg/mL).
  2. Volume. 0.05 mg ÷ 1 mg/mL = 0.05 mL.
  3. Units. 0.05 mL × 100 = 5 units on a U-100 syringe.
  4. Check. One unit holds 10 mcg; 5 × 10 mcg = 50 mcg = 0.05 mg, which matches. The vial holds 20 draws of this size.

IGF-1 LR3: notes for the arithmetic

IGF-1 LR3 is sold in 1 mg vials, a tenth of most peptides here, so the concentration is low and readings are in micrograms. 1 mg in 1 mL is 1 mg/mL: 50 mcg is 5 units, and 1 unit is 10 mcg. Some labels specify a diluent other than bacteriostatic water. Follow the label; the arithmetic is the same for any liquid.

For the lab procedure itself (materials, aseptic technique, mixing without foaming) see how to reconstitute peptides. For what bacteriostatic water is and how long an opened vial is kept, see the bacteriostatic water guide and the storage guide.

Frequently asked questions

How many units is 50 mcg of IGF-1 LR3?

It depends on the water volume. 1 mg + 1 mL = 1 mg/mL, so 50 mcg is 0.05 mL, or 5 units on a U-100 syringe. With 0.5 mL instead it would be 2.5 units.

How much bacteriostatic water for a 1 mg IGF-1 LR3 vial?

There is no single correct volume. 0.5 mL gives 2 mg/mL (20 mcg per unit); 1 mL gives 1 mg/mL (10 mcg per unit); 2 mL gives 0.5 mg/mL (5 mcg per unit). Pick the volume that makes your reading easy to measure on the barrel you have.

How many mg of IGF-1 LR3 is 10 units?

10 units on a U-100 syringe is 0.1 mL. At 1 mg/mL (1 mg in 1 mL) that is 0.1 mg (100 mcg). At a different concentration the answer is different.

Is this a IGF-1 LR3 dosing calculator?

It is an arithmetic tool. It converts an amount you enter into a volume and a syringe reading; it does not suggest amounts, schedules or uses. Not approved by the FDA for any use. Sold as a research chemical only.

Sources

  1. FDA alerts health care providers, compounders and patients of dosing errors associated with compounded injectable semaglutide products — U.S. Food and Drug Administration, 2024

Links checked 2026-10-19.