NAD⁺ vial calculator: units, milligrams, shots and what a month costs
Enter the strength, the volume, your dose in units and how often. Get the milligrams per shot, the doses in the vial, how long it lasts, and the cost per milligram — plus what the same instruction would deliver at the other common strength.
Off the label and the instruction
Still need the strength in mg/mL, the vial volume in mL, one dose, in units and how many shots a week. If a seller will not give you the strength and the volume, that is the finding — not a gap in this page. Why those three numbers →
This page converts numbers; it does not choose them. The amount and the frequency belong to whoever wrote your protocol. If a figure here does not match what you were told, the disagreement is worth raising with them rather than resolving on your own.
Why the syringe cannot answer this
A U-100 insulin syringe is graduated so that 100 units is one milliliter. That is a definition, not a property of what is inside: the barrel measures volume, and it has no way of knowing how concentrated the liquid is. So the same twenty marks are twenty milligrams from one vial and forty from another, and neither vial looks any different in your hand. The conversion, worked through a real vial walks the arithmetic step by step.
This is also why the cost figures above are worth more than a monthly price. Two sellers a hundred dollars apart can be charging the same rate per milligram, or one can be charging four times the other; you cannot tell from the headline. Once you have a cost per milligram you can hold it against every seller that publishes a dose, or against the full price table.
If you cannot fill the fields in
You are not alone, and it is not your failing. Of the 161 sellers we have reviewed, 70 publish a milligram dose anywhere on the product page — which leaves 91 whose price cannot be converted into an amount at all. Some publish a concentration and no volume, which looks like transparency and resolves to nothing you can act on.
A seller who will not give you the strength, the volume and the per-injection amount has not told you what you are buying. That is a usable finding in itself — it is one of the four questions behind the transparency scorecard, and it is worth asking before you pay rather than after the vial arrives.