Formula
- Use the units shown beside each field.
- Results update automatically whenever you change an input.
- Displayed values use up to four decimal places, or scientific notation for very small or large numbers. Calculations use standard floating-point arithmetic; exact integer and fraction tools identify their own precision rules.
- Beer–Lambert model using the correct wavelength-specific extinction coefficient. Does not identify sequence or correct contaminants.
Example Calculation
- Blank-corrected absorbance: 0.5
- Molar extinction coefficient: 50000 L/(mol·cm)
- Path length: 1 cm
- Protein molar mass: 50000 g/mol
- Dilution factor: 1
Blank-corrected absorbance = 0.5; Molar extinction coefficient = 50000; Path length = 1; Protein molar mass = 50000; Dilution factor = 1. Primary result: 0.5.
Frequently asked questions
How do I use this calculator?
Enter blank-corrected absorbance, molar extinction coefficient, path length, protein molar mass, dilution factor. The result updates automatically. Use Reset to restore the example values.
What method does it use?
g/L=A ×molar mass ×dilution/(epsilon ×path).. Beer–Lambert model using the correct wavelength-specific extinction coefficient. Does not identify sequence or correct contaminants.
Why might a rounded result differ?
The calculation keeps full numeric precision internally, then rounds the displayed result. Rounding intermediate steps by hand can produce a slightly different answer.
Are my inputs saved online?
No. This calculator processes your inputs in your browser. A recently used list stores only calculator names on this device, not your entered values.
Check the assumptions and units before using this result. Read about calculation methods.