Как это работает
- 1Enter the requested chemistry values, formula or equation.
- 2Check units and leave a field blank only when the tool is designed to solve for an unknown.
- 3Run the calculation and review the result, formula and supporting breakdown.
← Chemistry Calculators & Laboratory Tools
BROWSER · Toolardo Chemistry Core (local JavaScript)
Beer–Lambert Law Calculator
Solve A = εbc for absorbance, molar absorptivity, path length or concentration by leaving one field blank.
✓ Runs locally in your browser✓ No account required✓ Deterministic formula-based calculation
A = εbc — leave exactly one field blank.
Missing value
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Equation
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Use mutually consistent units. For ε in L·mol⁻¹·cm⁻¹, use b in cm and c in mol/L.
Об этом инструменте
The calculation uses A = εbc; units must be mutually consistent, typically ε in L·mol⁻¹·cm⁻¹, b in cm and c in mol/L.
Common uses
Beer Lambert law calculatorabsorbance calculatormolar absorptivity calculatorextinction coefficient calculator
Часто задаваемые вопросы
What units should I use for ε?
A common choice is L·mol⁻¹·cm⁻¹ when path length is in cm and concentration is in mol/L.
Does Beer–Lambert always stay linear?
No. Deviations can occur at high concentration, with scattering, chemical equilibria or instrumental limitations.
What is absorbance?
Absorbance is dimensionless and equals εbc in the ideal Beer–Lambert model.
Does this calculation run on a server?
No. The calculation runs locally in your browser with JavaScript.
Can I use the result directly in laboratory work?
Use it as a calculation aid and verify reagent form, purity, constants, assumptions and your laboratory SOP before operational use.