Free tools
Calculators for the bench
Three small tools that remove the arithmetic most likely to go wrong when handling lyophilized peptides. Everything runs in your browser — nothing is sent anywhere.
Peptide reconstitution calculator
Given a vial mass and a target concentration, work out how much bacteriostatic water to add and what each mark on the syringe delivers.
Open calculatorMolarity calculator
Convert between mass, molecular weight, volume and molar concentration — solve for whichever value you are missing.
Open calculatorUnit converter
Move between grams, milligrams, micrograms and nanograms, between millilitres and microlitres, and between syringe units and mass.
Open calculatorWhich calculator answers which question
| Tool | What it gives you |
|---|---|
| Peptide reconstitution calculator | Concentration in mg/mL and mcg/mL, mcg per U-100 syringe unit, diluent volume for a target per unit, and the volume and units to draw for a given mass. |
| Molarity calculator | Molar concentration from mass, mass from a target molarity, the volume a mass dissolves into, and mg/mL expressed in µM. |
| Unit converter | mcg to mg and back, mL to µL, syringe units to volume, and units to mass once the concentration is known. |
The three are deliberately separate: reconstitution works in mass per volume and syringe graduations, molarity works in moles and needs a molecular weight, and the converter handles a single prefix step when a decimal point looks wrong. Start from the reconstitution calculator if you have a vial in front of you and are not sure which you need.
All three are measurement aids for laboratory work. Materials in this catalog are supplied as laboratory research material, not as drugs, supplements or consumer products. For the procedure around the arithmetic, see how to reconstitute lyophilized peptides and common reconstitution and storage mistakes.