Peptide Calculator
Enter peptide amount, water added, and target dose to calculate concentration, draw volume, and U-100 syringe units in one step.
This page uses the site standard math assumptions: 1000 mcg = 1 mg and a U-100 insulin syringe reads 1 ml as 100 units.
Total peptide content in the vial
Bacteriostatic or protocol-specific volume
Target amount for one administration
Primary output
10 units
Draw this amount on a U-100 insulin syringe.
2.5 mg/ml
0.1 ml
10 units
20
Best for first-pass reconstitution math
Use this mode when you know vial strength, water volume, and target dose, but want the final draw amount without doing each conversion manually.
One-step calculation
Start with peptide amount, water volume, and target dose to get concentration, draw volume, and U-100 units in one place.
Tool first, explanation second
Calculate first, then open the examples, formulas, and reference pages only when you need a second check.
Vial setup
Start from vial strength and water volume
Use the batch-setup workflow when you need concentration, total doses, and dose outputs from the same vial.
Known concentration
Convert a dose from mg/ml only
Move to the concentration-first workflow when batch setup is already done and you only need dose conversion.
Questions
Peptide FAQ
Check dose, concentration, and U-100 unit questions without leaving the main tool flow.
When to use a narrower calculator
Check the math before you trust the result
Concentration
peptide_mg / water_ml
The homepage calculator derives concentration first because that value controls every later volume and unit output.
Dose volume
dose_mg / concentration
Once concentration is derived, the target peptide dose can be converted into the actual ml volume to draw.
U-100 units
volume_ml * 100
Final syringe units are shown using the common U-100 convention so the answer is immediately actionable on a standard insulin syringe.
Run the numbers on common peptide scenarios
5 mg vial, 2 ml water, 250 mcg dose
A clean baseline scenario for checking the one-step workflow.
Units: 10 units
Volume: 0.10 ml
Concentration: 2.5 mg/ml
10 mg vial, 3 ml water, 500 mcg dose
A higher-strength example for comparing concentration and draw volume.
Units: 15 units
Volume: 0.15 ml
Concentration: 3.33 mg/ml
2 mg vial, 1 ml water, 100 mcg dose
A compact scenario for smaller vials and lower-dose checks.
Units: 5 units
Volume: 0.05 ml
Concentration: 2 mg/ml
Trust
About & Editorial Standards
See how formulas, assumptions, and updates are maintained across the site.
Questions
Peptide FAQ
Use the question layer when you need quick clarification about dose math, concentration, and units.
Support
Peptide Concentration Guide
Read this guide if you want a slower explanation of why mg/ml controls every later output.
Peptide calculator questions
These answers cover the broad questions users ask before or after a one-step peptide calculation.