// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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sci.color-temperature-Planckian Calculator
Calculates the blackbody spectral radiance from Planck's law and finds the correlated colour temperature of a light source from its chromaticity coordinates. Incandescent bulbs have CCT ≈ 2,700 K; daylight ≈ 6,500 K — lower CCT is 'warmer' (more yellow/red) though physically cooler.
Inputs
T K
Thermal state of the substance. Check whether the formula needs Celsius, Fahrenheit, or Kelvin (K = °C + 273.15).
Results
peak wavelength λ_max (nm)
The computed linear length.
peak wavelength λ_max (µm)
The computed linear length.
spectral radiance at 550nm (relative)
The value at the specified point or condition.
Wien: λ_max = 2898 µm·K / T
Sample size or count used in the calculation.
colour appearance
The colour classification or output colour code computed from the inputs.
photography CRI
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).