Tools and references

Four hand-built references. Two of them calculate; two of them explain. All four exist because the same arithmetic and the same misreadings come up in questions here every week, and a page is cheaper than answering it again.

Reconstitution & syringe calculator

Diluent volume in, concentration and U-100 insulin units out — with the dead-space loss you are actually going to incur.

Referenceupdated 2026-07-30

How to read a certificate of analysis

A field-by-field walkthrough, including the one misreading that matters more than all the others.

Referenceupdated 2026-07-30

Peptide stability & storage reference

What is measured, what is extrapolated, and which degradation pathway dominates under which condition.

Referenceupdated 2026-07-30

Titration schedule reference

The label ladders side by side, the pharmacokinetics underneath them, and vial-day arithmetic.

Referenceupdated 2026-07-30

A note on the calculators. They run entirely in your browser, send nothing anywhere, and will happily produce a confident answer to a badly posed question. Check the units. Then check them again with someone else, which is the single highest-value habit in this entire subject area.