Peptide Reconstitution & Concentration Calculator
Accurate, research-only calculations for lyophilised peptides and solution volumes.
Select your syringe size
Select peptide amount (mg)
Required sample size
Mixing solution to add
📖 Peptide calculator info
This free peptide calculator helps researchers work out reconstitution and measurement in the lab. Enter your vial amount in mg, your mixing water in mL and a required sample size in mcg or mg. The tool returns the volume to measure and graduated units for common U-100 laboratory syringes.
Also called a peptide reconstitution calculator or peptide dilution calculator, it converts mg↔mL and mcg↔IU and suggests easy measurement points for typical vials.
🔢 Quick conversions
💡 Peptide reconstitution examples
Example 1: 10mg peptide vial
Scenario: 10mg peptide, want 250 mcg sample
Recommendation: Add 2mL bacteriostatic water
Result: Measure 0.05mL (5 IU) for ~250 mcg sample
Example 2: 5mg peptide vial
Scenario: 5mg peptide, want 500 mcg sample
Recommendation: Add 1mL bacteriostatic water
Result: Measure 0.1mL (10 IU) for ~500 mcg sample
❓ Frequently asked questions
How do I reconstitute lyophilised peptides?
Add bacteriostatic water slowly to your peptide vial. Use the calculator to determine the volume needed for your intended concentration. For in vitro research only.
What syringe size is shown?
U-100 graduated syringes, selectable as 0.3 mL, 0.5 mL, or 1 mL.
How do I convert mg to mcg?
1 mg equals 1000 mcg. The calculator keeps both in sync.
What's the difference between mL and IU?
mL is volume. IU are unit markings on U-100 graduated syringes where 1 mL equals 100 IU.