Lab tools
Peptide reconstitution calculator
Instantly calculate concentration, draw volume, and aliquot count for lyophilized research peptides. Built for bench protocols — not medical dosing.
Browse research catalog →Research reconstitution calculator. For laboratory aliquot preparation only — not dosing guidance for human or veterinary use. Always follow your protocol and batch COA.
Inputs
Strength printed on the vial
mg
Bacteriostatic or sterile water added
mL
Amount of peptide per laboratory aliquot
mcg
250 mcg = 0.250 mg
Results
Concentration
10.00 mg/mL
10000 mcg/mL
Draw volume
0.025 mL
2.5 units (U-100)
Aliquots per vial
80.0
at this aliquot size
Peptide / aliquot
250 mcg
0.250 mg
Tip: Increase water for finer aliquot resolution
U-100 syringe guide (1 mL = 100 units)
0255075100
Draw to ~2.5 units
Concentration = vial mg ÷ diluent mL
Draw mL = (target mcg ÷ 1000) ÷ concentration mg/mL
Units = draw mL × 100 (U-100 syringe)
How laboratory reconstitution works
- Enter the lyophilized peptide mass on the vial (e.g. Retatrutide 20 mg).
- Enter how much diluent you will add for your assay protocol (e.g. 2 mL bacteriostatic water).
- Enter the peptide mass you want in each laboratory aliquot (mcg).
- Use the calculated concentration and draw volume to prepare aliquots at the bench. Cross-check with your COA and SOP.