Calculator
U-100 syringe calculator
A unit is a volume mark, not a dose. Enter vial mg, BAC mL, and dose to see the exact U-100 units to draw.
U-100 math · private · no signup
The plunger marks the correct draw for your target — even in check mode, so the picture never reinforces a wrong planned draw.
| Mark | Volume | = delivers |
|---|---|---|
| 6 u | 0.06 mL | 150 mcg |
| 8 u | 0.08 mL | 200 mcg |
| 10 u ◀ your target | 0.1 mL | 250 mcg |
| 12 u | 0.12 mL | 300 mcg |
| 14 u | 0.14 mL | 350 mcg |
Each row is the dose the mark actually delivers from your vial — not a suggested dose. Only your target is highlighted.
Math runs in your browser. No account, nothing sent anywhere, nothing stored. Reconstitution numbers do not transfer between vials — these are computed from the vial and volume you entered.
Need cycle timing, source-lane handling, and stop rules? The full protocol planner takes it from here.
What it checks
- › Units for a target dose
- › mcg per unit
- › Split draw over 100 units
- › Weekly draw burden
When it helps
- › A post gives units, not a dose
- › The label is mg, the syringe is units
- › You want the draw to fit 100 units
What it won’t verify
- › Correct compound identity
- › Sterile technique
- › Personal dose fit
Reading a COA for a vial? Use the manual COA literacy checklist. No upload, no verification, no pass mark.
The mistake it prevents
"Draw 10 units" is not a dose. Units are volume marks on the barrel. Ten units of a 5 mg/mL mix is the same volume as ten units of a 2.5 mg/mL mix, and twice the drug.
A units number is only a volume until you know the concentration it was drawn at. Copying the units without the concentration copies the wrong dose.
See the math
Halve the concentration and the same 5-unit draw delivers half the drug. The syringe never changes; the micrograms do. The calculator ties units to your actual concentration.
Before you draw
- Know the mg/mL before trusting any units number
- Pick your barrel: the checker recomputes for U-100 or U-40; mL-only still converts by hand
- Keep the dose on a readable mark
- Plan a split if it goes over 100 units
Protoche is a checker, not a prescriber. Use it to catch math, source-lane, and stop-rule problems before you make a decision with a licensed clinician or before you decide to pause.