Concentration chart
Fifty-six combinations of vial strength and diluent volume, computed by the same code as the calculator.
Educational arithmetic only. Not medical advice and not a dosing protocol.
| Vial | 0.5 mL | 1 mL | 1.5 mL | 2 mL | 2.5 mL | 3 mL | 5 mL |
|---|---|---|---|---|---|---|---|
| 1 mg | 2.000 | 1.000 | 0.667 | 0.500 | 0.400 | 0.333 | 0.200 |
| 2 mg | 4.000 | 2.000 | 1.333 | 1.000 | 0.800 | 0.667 | 0.400 |
| 2.5 mg | 5.000 | 2.500 | 1.667 | 1.250 | 1.000 | 0.833 | 0.500 |
| 5 mg | 10.000 | 5.000 | 3.333 | 2.500 | 2.000 | 1.667 | 1.000 |
| 10 mg | 20.000 | 10.000 | 6.667 | 5.000 | 4.000 | 3.333 | 2.000 |
| 15 mg | 30.000 | 15.000 | 10.000 | 7.500 | 6.000 | 5.000 | 3.000 |
| 20 mg | 40.000 | 20.000 | 13.333 | 10.000 | 8.000 | 6.667 | 4.000 |
| 30 mg | 60.000 | 30.000 | 20.000 | 15.000 | 12.000 | 10.000 | 6.000 |
| Vial | 0.5 mL | 1 mL | 1.5 mL | 2 mL | 2.5 mL | 3 mL | 5 mL |
|---|---|---|---|---|---|---|---|
| 1 mg | 200.0 | 100.0 | 66.7 | 50.0 | 40.0 | 33.3 | 20.0 |
| 2 mg | 400.0 | 200.0 | 133.3 | 100.0 | 80.0 | 66.7 | 40.0 |
| 2.5 mg | 500.0 | 250.0 | 166.7 | 125.0 | 100.0 | 83.3 | 50.0 |
| 5 mg | 1000.0 | 500.0 | 333.3 | 250.0 | 200.0 | 166.7 | 100.0 |
| 10 mg | 2000.0 | 1000.0 | 666.7 | 500.0 | 400.0 | 333.3 | 200.0 |
| 15 mg | 3000.0 | 1500.0 | 1000.0 | 750.0 | 600.0 | 500.0 | 300.0 |
| 20 mg | 4000.0 | 2000.0 | 1333.3 | 1000.0 | 800.0 | 666.7 | 400.0 |
| 30 mg | 6000.0 | 3000.0 | 2000.0 | 1500.0 | 1200.0 | 1000.0 | 600.0 |
Read this with the answer
This is educational arithmetic on figures entered by the reader. It is not medical advice, not a dosing protocol, and not a recommendation that anything be prepared, obtained or administered.
Nothing here states what quantity is appropriate for anyone, and there is no function in it that produces an amount to administer. A question about anyone’s health belongs with a licensed clinician who can examine the person asking.
Most compounds named here are research chemicals that are not approved by the FDA for human use. An exact calculation is not an accurate measurement: what is actually in a syringe depends on the preparation and the device, neither of which this page can see.
No qualified clinical reviewer is recorded against this site, and no credential is claimed anywhere on it. Full disclaimer.
How to read the second table
0.1 mL is ten units on a U-100 barrel, which makes the second table the one most people actually want: it answers "how many micrograms are in ten units" without any further arithmetic. At other scales the same 0.1 mL is five units on a U-50 and four on a U-40, so the microgram figure holds while the unit reading does not.
Why every figure here is labelled an upper bound
These are computed as mass over diluent, which is the only basis available without knowing the displacement of the solid in a particular vial. The finished solution is slightly larger than the diluent added, so the true concentration is slightly lower than the figure in the table. The difference runs in one direction only, and it is small for milligram quantities.
The reconstitution identity works through why that is the strongest true statement the inputs support, and the calculator switches to a measured basis if the finished volume is entered.
Gaps in the table
Any combination not listed can be worked out from c = m / V directly, or
entered into the calculator, which takes any figures rather than the
selection here. The vial strengths chosen are the ones that recur in this field; nothing
about appearing in this table makes a combination recommended, and nothing about being
absent from it makes one unusual.