Calculator
Peptide reconstitution calculator
Enter vial mg, BAC mL, and your dose to get the concentration, U-100 draw units, and doses per vial.
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
- › Concentration (mg/mL)
- › U-100 units per dose
- › Vial yield & split draws
- › Pre-mix source-lane check
When it helps
- › You have a vial and a BAC volume
- › You are picking 1, 2, or 3 mL
- › You need a 100-unit draw
What it won’t verify
- › Purity or sterility
- › Vendor-label honesty
- › Legal or clinical fit
Reading a COA for a vial? Use the manual COA literacy checklist. No upload, no verification, no pass mark.
The mistake it prevents
The most common first-dose error is copying a number from a post. Someone says "reconstitute with 2 mL and draw 10 units." You have a 10 mg vial; they had a 5 mg vial. Same water, same draw, double the actual dose.
Reconstitution math does not transfer between vials. Your concentration is set by your own vial mass and your own BAC volume, so a number from a different vial is just a different vial.
See the math
Halve the BAC to 1 mL and the concentration doubles to 5 mg/mL: 50 mcg per unit, so 5 units for the same 250 mcg dose. Doses per vial stays 20, because that is set by vial mass and dose, not water. The calculator recomputes all of this from your actual vial.
Before you mix
- Confirm the vial mass on the label, not the mass in the post you read
- Lock one BAC volume before you mix, and keep it for every dose
- Check the dose lands on a readable unit mark, not between marks
- If the draw exceeds 100 units, plan the split before the first dose
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.