Protein concentration calculator

Convert protein concentration, total quantity, and volume from a required molecular weight. Molecular weight is the only mandatory field; equivalent concentration and quantity units are inferred as soon as one value is provided.

Molecular weight is required. All optional fields update locally in the browser.

Inputs and calculated values

Waiting for values

Molecular weight required The only mandatory input. Enter protein molecular weight; kDa is selected by default.

Mass concentration Optional. With molecular weight, this fills molar concentration.

Molar concentration Optional. With molecular weight, this fills mass concentration.

Total quantity by mass Optional. With molecular weight, this fills total moles.

Total quantity by moles Optional. With molecular weight, this fills total mass.

Total volume Final solution volume.

Calculation state

Molecular weight is required. Then enter one concentration or quantity to infer its equivalent unit, or add volume to solve the full concentration/quantity/volume set.

Mass concentration: -
Molar concentration: -
Total mass: -
Total moles: -
Total volume: -

Molecular weight is the only required field. All other fields are optional source values or calculated values.
Fields you type into are source values. Automatically filled fields use a pale background.
Changing a unit converts the displayed value so the underlying amount stays constant.
When duplicate source fields are filled, the most recently edited field in each category is used.