Free peptide calculator for UK laboratories: reconstitution volume, concentration (mg/mL and mcg/mL), draw volume, and U-100 syringe units (IU). For in-vitro research only—not for human or veterinary use.

Peptide reconstitution & concentration calculator

Accurate, research-only calculations for lyophilised peptides and bacteriostatic water volumes—aligned with common U-100 laboratory syringe markings.

1

Select your syringe size

2

Select peptide amount (mg)

3

Required sample size

4

Bacteriostatic water to add

Suggested for a 10 mg vial: add 2 mL bacteriostatic water for easier laboratory measurement.

Use bacteriostatic water (BAC) suitable for your documented laboratory workflow.

This tool provides generalised calculations for in-vitro research only. Not for human or veterinary use. Verify all values against your laboratory SOP and batch documentation.

Peptide calculator guide

How does this peptide reconstitution calculator work?

Enter your lyophilised peptide mass (mg), bacteriostatic water volume (mL), and target sample size in mcg or mg. The calculator returns solution concentration, the volume to draw from your vial, and U-100 syringe units (IU) for common 0.3, 0.5, and 1 mL syringes— for non-clinical laboratory planning only.

How do I reconstitute lyophilised research peptides?

Add bacteriostatic water slowly along the vial wall using aseptic technique. Use this calculator to choose a water volume that yields a concentration suitable for your required sample size in mcg or mg. Follow your institution’s SOP and the product SDS. For in-vitro research only.

What is the difference between mL and IU on a U-100 syringe?

mL is volume. On U-100 graduated syringes used in many laboratories, 1 mL = 100 IU (insulin-style unit markings). This calculator converts your required sample into both mL and IU.

How do I convert mg to mcg?

1 mg = 1,000 mcg. The required sample fields stay in sync automatically when you enter either unit.

Example: 10 mg peptide vial, 250 mcg sample

Scenario: 10 mg peptide, 250 mcg required sample.
Suggested water: 2 mL bacteriostatic water.
Result: Concentration 5 mg/mL (5,000 mcg/mL). Draw approximately 0.05 mL (5 IU) for ~250 mcg. Always confirm with your lab protocol.

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