Reconstitution calculator
Work out the volume to draw after mixing a peptide. Enter the vial strength, the water you added, and your dose. Nothing you type here is saved or sent anywhere.
Optional: include syringe hub / dead-space loss
Liquid retained in a needle hub reduces how many full draws a container yields without changing the volume drawn into the barrel.
Result
- Concentration
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- Draw volume
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- Insulin syringe (U-100)
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- Doses per vial
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- Leftover after whole draws
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100-unit barrel: each small line = 2 units (0.02 mL) · Enter values above to preview the matching mark on a U-100 scale.
How this math works
- 1. Concentration = vial mg ÷ diluent mL
- 2. Draw volume = dose mg ÷ concentration (mg/mL)
- 3. U-100 syringe marks = draw volume (mL) × 100
- 4. Whole doses = floor(vial mg ÷ dose mg)
This is arithmetic to help you read a syringe. It is not a dose recommendation, prescription, or medical advice. Confirm your dose, concentration, and syringe type with your healthcare provider or pharmacist.
Unit converter
Convert between units using values you enter. Arithmetic support only — not medical advice.
With a Zeppy account you can save these vial details to your supply, so the draw volume shows when you log a dose.
This app is for tracking and education only. It does not provide medical advice, diagnosis, or treatment recommendations. Talk to your healthcare provider before making medication or treatment decisions.