Vial strengths

Eight vial masses, each with its own page. Pick the mass printed on the vial in front of you and every figure that follows from it is already worked out.

Educational arithmetic only. Not medical advice and not a dosing protocol.

1 mg vial
At most 0.500 mg/mL in 2 mL of diluent, which is 50.0 mcg in a tenth of a millilitre.
2 mg vial
At most 1.000 mg/mL in 2 mL of diluent, which is 100.0 mcg in a tenth of a millilitre.
2.5 mg vial
At most 1.250 mg/mL in 2 mL of diluent, which is 125.0 mcg in a tenth of a millilitre.
5 mg vial
At most 2.500 mg/mL in 2 mL of diluent, which is 250.0 mcg in a tenth of a millilitre.
10 mg vial
At most 5.000 mg/mL in 2 mL of diluent, which is 500.0 mcg in a tenth of a millilitre.
15 mg vial
At most 7.500 mg/mL in 2 mL of diluent, which is 750.0 mcg in a tenth of a millilitre.
20 mg vial
At most 10.000 mg/mL in 2 mL of diluent, which is 1000.0 mcg in a tenth of a millilitre.
30 mg vial
At most 15.000 mg/mL in 2 mL of diluent, which is 1500.0 mcg in a tenth of a millilitre.

What the bench will not tell you

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.

Compounds of the kind this arithmetic is used on are largely 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. the limits of this bench.

Every vial against every diluent volume, in mg per mL. The whole of the first table on each page, in one place, for when you want to compare across vials rather than within one. Each figure is an upper bound.
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

Why the vial is the second reference family here

The barrel pages cover a device that cannot be inspected by software. These cover the other half of the bench: the quantity printed on a label, which is the figure every calculation starts from and the one nobody can verify either. A vial marked 5 mg contains what the manufacturer says it contains, and no arithmetic downstream can check that.

What these pages can do is remove the arithmetic as a source of error, so that the remaining uncertainty is honestly about the vial rather than about the maths. Every figure here was produced by the same code that answers the tools, so there is one place for an arithmetic error to be rather than two.

The one thing these pages will not tell you

Which row to use. The amount per draw in the second table on each page is a column heading, not a suggestion: seven figures chosen to span the range a vial of that size makes arithmetic sense at. Nothing here states, implies or recommends an amount for anyone, and the limits of this bench say so at full length.