About DoseMath

DoseMath is a free calculator for reconstituting peptides and finding the exact amount to draw on an insulin syringe. It does one thing: the arithmetic, shown so you can check it.

What it does

Enter the peptide in your vial, the bacteriostatic water you are adding, and your dose, and DoseMath shows the units to draw, the injection volume, the concentration, the micrograms per unit, and how many doses the vial holds. It marks the draw point on a visual syringe and warns you when a dose lands between marks, exceeds the syringe, or looks like a 1000× mix-up. A reverse mode works backward from a target draw to suggest how much water to add, and a blend mode handles two peptides in one vial.

What it will not do

DoseMath does not sell, source, price, recommend, or endorse any compound, dose, or supplier. It takes no money from peptide vendors or pharmacies and carries no affiliate links. It is a measurement tool, not medical advice, and not a substitute for a licensed clinician. Confirm the markings on your own syringe before drawing.

Privacy

The calculation runs entirely in your browser. The numbers you enter — your vial, water, and dose — are never transmitted to a server or saved anywhere. There is no account and no tracking of your inputs. If display ads are shown, they are clearly labelled and load from a third party; the calculator itself still sends nothing.

Accuracy and corrections

Every result is plain arithmetic you can reproduce by hand. The methodology page shows every formula with a worked example so you can verify the tool rather than trust it. If you find an error in the math, that is the thing we most want to hear about — corrections are logged in the changelog.

Independence and funding

DoseMath is an independent project, self-funded and not affiliated with any vendor or supplier. Any future revenue comes only from clearly-labelled display advertising, never from steering you toward a product or source.

Who runs it

DoseMath is an independent project operated under a registered LLC.