Peptide reconstitution calculator

Calculate peptide concentration with the formula in view.

Enter vial mass and final diluent volume to calculate mg/mL and mcg/uL. Add an optional research amount to check the matching microliter volume.

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Inputs

Vial and volume

Leave the optional amount as a research arithmetic target only; it is not a dose recommendation.

Reconstitution result

2.5 mg/mL

2.5 mg/mL equals 2.5 mcg/uL.

Read this as concentration first, then volume second. The calculator is not checking whether the source material or workflow is appropriate.
Total peptide
5,000 mcg
Aliquot volume
40 uL
Approx. aliquots
50
Formula
5 mg / 2 mL

Quick formula

Concentration = peptide mass / final volume

A 5 mg vial brought to 2 mL final volume is 2.5 mg/mL. Because mg/mL and mcg/uL are numerically equal, that is also 2.5 mcg/uL.

5 mg / 2 mL = 2.5 mg/mL
2.5 mg/mL = 2.5 mcg/uL

Chart preview

Common concentration examples

MassFinal volumemg/mLmcg/uL
5 mg1 mL5 mg/mL5 mcg/uL
5 mg2 mL2.5 mg/mL2.5 mcg/uL
10 mg2 mL5 mg/mL5 mcg/uL

Formula-first

Every result is built from visible mass, volume, concentration, and unit-conversion formulas.

Research-only boundaries

The site does not recommend doses, protocols, routes, products, sources, or medical decisions.

Auditable examples

Reference tables and worked examples help users catch common mg, mcg, mL, and uL mistakes.

Review boundary

Educational calculation, not protocol advice.

CalcPeptides helps check arithmetic. It cannot verify product identity, safety, sterility, suitability, route, schedule, or clinical use.