Protein concentration calculator

Enter the protein's molecular weight, then a concentration or amount to convert between mass and moles. Add a value from a second category, such as volume, to calculate the remaining quantities.

Molecular weight is required. Calculations run in your browser.

Inputs and calculated values

Waiting for values

Molecular weight required Enter a positive value and check the unit. The default is kDa.

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: -

Enter molecular weight first. Use any two categories to solve the full calculation: concentration, amount, or volume.
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.
If you enter both mass and molar values in one category, the latest edit is used. If you supply concentration, amount, and volume, they must agree.