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Wien's Law Calculator
All physics tools
Calculate peak wavelength of black body radiation from temperature.
Temperature
Temperature (Kelvin)
Reset
Peak Wavelength
Peak λ (meters)
-
m
Peak λ (nm)
-
nm
About this calculator
Quick Reference
b
2.898 mm·K
Overview
Wien's displacement law states that the black body radiation curve produces a peak wavelength inversely proportional to the temperature.
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Pro Tips
Hotter objects emit radiation at shorter wavelengths (bluer).
Cooler objects emit at longer wavelengths (redder/infrared).
b ≈ 2.898 × 10⁻³ m·K.
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Fun Facts
"The Sun (approx 5778K) peaks in the visible green spectrum."
"The universe's background radiation (2.7K) peaks in the microwave range."
Formula: λmax = b / T
