Reconstitution math
Concentration determines the amount in each U-100 syringe scale unit: 100 units = 1 mL, so 1 unit = 0.01 mL. This applies only to U-100 calibration, not every insulin syringe. These are hypothetical arithmetic examples, not recommended doses or mixing recipes.
mg per U-100 scale unit (vial mg ÷ final solution mL ÷ 100). Try your own numbers ↓
| Vial | 1 mL final | 2 mL final | 3 mL final |
|---|---|---|---|
| 5 mg | 0.05 mg (5 mg/mL) | 0.025 mg (2.5 mg/mL) | 0.0166667 mg (1.66667 mg/mL) |
| 10 mg | 0.1 mg (10 mg/mL) | 0.05 mg (5 mg/mL) | 0.0333333 mg (3.33333 mg/mL) |
| 15 mg | 0.15 mg (15 mg/mL) | 0.075 mg (7.5 mg/mL) | 0.05 mg (5 mg/mL) |
| 20 mg | 0.2 mg (20 mg/mL) | 0.1 mg (10 mg/mL) | 0.0666667 mg (6.66667 mg/mL) |
| 30 mg | 0.3 mg (30 mg/mL) | 0.15 mg (15 mg/mL) | 0.1 mg (10 mg/mL) |
Illustrative amounts and final volumes, not dosing recommendations. Values over 100 units exceed the capacity of a 1 mL U-100 syringe. Try your own numbers ↓
| Amount | 5 mg / 1 mL final | 10 mg / 1 mL final | 10 mg / 2 mL final | 15 mg / 2 mL final | 20 mg / 2 mL final | 30 mg / 3 mL final |
|---|---|---|---|---|---|---|
| 0.25 mg | 5 U | 2.5 U | 5 U | 3.33333 U | 2.5 U | 2.5 U |
| 0.5 mg | 10 U | 5 U | 10 U | 6.66667 U | 5 U | 5 U |
| 1 mg | 20 U | 10 U | 20 U | 13.3333 U | 10 U | 10 U |
| 2 mg | 40 U | 20 U | 40 U | 26.6667 U | 20 U | 20 U |
| 2.5 mg | 50 U | 25 U | 50 U | 33.3333 U | 25 U | 25 U |
| 5 mg | 100 U | 50 U | 100 U | 66.6667 U | 50 U | 50 U |
For U-100 scale markings, volume = units ÷ 100. Amount = volume × concentration; hypothetical 10 mg in 2 mL final solution shown. Try your own numbers ↓
| Units | mL | mg at 10 mg / 2 mL |
|---|---|---|
| 5 U | 0.05 mL | 0.25 mg |
| 10 U | 0.1 mL | 0.5 mg |
| 20 U | 0.2 mL | 1 mg |
| 25 U | 0.25 mL | 1.25 mg |
| 30 U | 0.3 mL | 1.5 mg |
| 40 U | 0.4 mL | 2 mg |
| 50 U | 0.5 mL | 2.5 mg |
| 75 U | 0.75 mL | 3.75 mg |
| 100 U | 1 mL | 5 mg |
Enter a verified vial mass and final solution volume, then convert a prescribed amount to U-100 units — or units back to mL and mg. No dose is selected for you.
Use verified final volume, not automatically water added. Label or pharmacist instructions take precedence.
Enter finite positive vial mass, final volume and prescribed amount.
U-100 calibration only; 100 scale units = 1 mL. Displayed values are rounded mathematical equivalents, not verified syringe measuring precision. Arithmetic only — not medical advice and not a dose recommendation. Your dose must come from a licensed healthcare provider.
Source review: November 11, 2026. References support conversions and safety cautions, not the example recipes.
Gives the U-100 example 5 units = 0.05 mL, warns that concentrations vary, and recommends provider or pharmacist verification of the intended amount and syringe.
Its label states 11.6 mg per vial, 1.3 mL diluent added and a resultant concentration of 8 mg/mL — not simply 11.6 ÷ 1.3. Product-specific labeled concentration takes precedence over generic water-added math. This is not a preparation recommendation.
Trial dosing does not validate the hypothetical vial-and-water preparations previously shown here. The trial-dose mixing chart has been removed; no clinical dosing schedule is provided on this page.
Need syringe sizes, dose presets and a plain-language explanation? The full calculator works out any combination.
Open the full calculator →Always verify these calculations with a qualified healthcare professional before relying on them.
This calculator is an educational and informational tool only. It performs arithmetic on the numbers you enter — it is not medical advice, and nothing here has been reviewed by a doctor or pharmacist.
Peptide compounds discussed in research contexts are not approved by the FDA for human use and are not evaluated for safety, purity, or dosing. Compounded or reconstituted solutions carry real risks: contamination, inaccurate concentration, and dosing errors.
Nothing on this site should be used to prepare, reconstitute, or administer any substance to yourself or anyone else. Always follow the prescription, product insert, and instructions of a licensed healthcare provider, and verify every calculation independently before acting on it.
Use of this tool is entirely at your own risk. No warranties are made as to the accuracy of any result, and its creators accept no liability for any outcome arising from its use.