Enter any three values in A = εcl to calculate the missing value with the Beer–Lambert law.
AbsorbanceA = εcl--
Molar absorptivityε = A / cl-- L mol⁻¹ cm⁻¹
Concentrationc = A / εl-- mol/L
Path lengthl = A / εc1 cm
Transmittance%T = 100 × 10⁻ᴬ-- %
A = −log₁₀T = εclT = I / I₀