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Units to mg converter
Two-way conversion between syringe units and milligrams, for any vial, any water amount, and either the U-100 or the U-40 scale.
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The dose math tools
Three converters sit here, and none of them knows or cares what is in the vial. They work on the numbers printed on a label and the marks printed on a barrel, which is why one set of tools covers every compound in the library. What they share is a single equation, entered from three different directions depending on which number is already known.
Short answer
What these are: three compound-agnostic converters. They take a vial size, a water volume and a barrel scale, and return what the arithmetic supports for those figures and nothing else.
One equation, three directions: concentration is vial milligrams divided by water milliliters. One tool runs it forward to a syringe reading, one runs it to a concentration or back to a water amount, and one runs it backward from a chosen mark.
The fixed facts underneath: a U-100 barrel marks 100 units per mL, so a unit is 0.01mL. A U-40 barrel marks 40, so a unit is 0.025mL. One milligram is 1,000mcg.
What they never do: choose a concentration or a target mark for anyone. Both are decisions rather than constants, which is why every field starts empty and nothing renders until real numbers exist.
On this page
Which tool answers which question?
If the vial and the water are known: the units to mg converter turns any amount into a reading, and any reading back into an amount, on either barrel scale.
If the target concentration is the unknown: the reconstitution calculator divides the vial by the water. Give it a concentration instead and it returns the water volume that produces it.
If the syringe mark is the starting point: the bacteriostatic water calculator solves the same division backward, from a vial size and an amount to measure to the water volume that puts one on the other.
What does a tool need before it can answer anything?
Three numbers, and there is no substitute for any of them: the mass the vial label claims, the volume of liquid added to it, and which barrel scale is being read.
Miss one and there is no answer: a milligram figure with no water volume behind it has no reading, and a reading with no concentration behind it has no mass. That is arithmetic, not a design choice.
Which is also why nothing is prefilled: a default value in an empty field is a recommendation nobody asked for. The pages render blank until three real numbers exist, then render the working alongside the result.
What do these tools leave to the compound pages?
Everything about the compound. A converter has no view on whether a molecule has ever been given to a human, what a trial measured, or what a regulator has written about it.
That material lives next door: the compound guides carry the trial record and the label record, and the classification pages carry what regulators and anti-doping agencies have published.
And the concepts underneath: the explainers in the dose math section take one confusion apart at a time, from what a unit is to why the same mark means different masses in two different vials.
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The three tools
Each runs in the browser tab: nothing typed into any of them is stored, logged, or sent anywhere.
Calculator
Reconstitution calculator
Vial size plus water volume to concentration, or a target concentration back to the water it needs, with the per-unit figure alongside.
Open the toolCalculator
Bacteriostatic water calculator
The same division solved backward: from a vial size, an amount to measure and a target mark, to the water volume that puts one on the other.
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The units to mg converter travels: one line of markup puts it on any page, carrying the same arithmetic, the same empty-until-filled behaviour, and no cookies, no storage and no analytics of any kind.
What it costs: nothing, and the licence is one sentence long, which is that the attribution link stays visible. The snippet, a live preview and the full terms are on the embed page.
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Every page is reviewed by medical professionals before it ships, and written with longtime biohackers who were doing this before it was a trend. Reviewed still does not mean prescribed: nothing here is medical advice. It is research, trial data, and reported use, with the numbers intact so you can check them. For decisions about your body, see a doctor who can look at your labs.
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