A clearer look at the science
See how light
becomes a
measurement.
Explore absorbance, calculate concentration and turn your measurements into clear calibration graphs.
Free to use. No account. Just a little curiosity.
Light through a sampleLive model
Absorbance0.50 A
Transmittance31.62 %
An idealised model · illustrative ε = 20,000 L·mol⁻¹·cm⁻¹
Adjust values precisely in the visual explainer.
↗ Established equations, explained◎ Your data stays in your browser↓ Useful exports, always free
Your scientific toolkit
Less friction. More understanding.
01 / LIGHT & TRANSMISSION
Absorbance ↔ transmittance
Move between absorbance and percentage transmittance. See what the numbers mean.
Convert a value
02 / CONCENTRATION
Beer–Lambert calculator
Find absorbance or concentration, with clear units and every step of the calculation.
Start calculating
03 / DATA & CALIBRATION
Calibration curve builder
Bring your standards. Fit a line, explore residuals and estimate unknown concentrations.
Build a graph
Make sense of the measurement
The why behind the numbers.
A few good explanations go a long way. Build your understanding with short guides and worked examples.
Explore the learning library