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Beer-Lambert Law Calculator

Determine the concentration of a solution from its measured absorbance, extinction coefficient, and path length using Beer-Lambert law. Essential for spectrophotometry and quantitative analytical chemistry.

Absorbance (A) (AU)

Molar Extinction Coefficient (ε) (M⁻¹cm⁻¹)

Path Length (l) (cm)

Dilution Factor

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Chemistry

Molecular Weight Calculator

Compute the molecular weight (molar mass, g/mol) of a CHON-containing molecule from the number of carbon, hydrogen, oxygen, and nitrogen atoms in its formula, with an optional isotope-correction factor. Useful for routine stoichiometry on organic and biological molecules where C, H, O, and N dominate the elemental composition.

Carbon Atoms (C) (atoms)

Hydrogen Atoms (H) (atoms)

Oxygen Atoms (O) (atoms)

Nitrogen Atoms (N) (atoms)

Isotope Correction

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Key differences

	Beer-Lambert Law Calculator	Molecular Weight Calculator
Category	Chemistry	Chemistry
Inputs required	4	5
Result	Concentration (M)	Molecular Weight (g/mol)
What it does	Determine the concentration of a solution from its measured absorbance, extinction coefficient, and path length using Beer-Lambert law. Essential for spectrophotometry and quantitative analytical chemistry.	Compute the molecular weight (molar mass, g/mol) of a CHON-containing molecule from the number of carbon, hydrogen, oxygen, and nitrogen atoms in its formula, with an optional isotope-correction factor. Useful for routine stoichiometry on organic and biological molecules where C, H, O, and N dominate the elemental composition.