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Physics

Wien Peak Wavelength Calculator

Find the peak wavelength of blackbody spectral radiance per unit wavelength.

SI units shown beside each fieldIdeal model explained below
Physics lab
Physics lab

Use the units beside each input and review the model assumptions.

See the method

Define your system

Runs on your device

Your calculated quantity

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter absolute temperature.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Peak wavelength = b/T with b=2.897771955×10⁻³ m·K.

A WORKED EXAMPLE

Using absolute temperature = 5778 K, the result is 501.518165 nm. Change these example inputs to match your task; use the method above to check each step.

Understanding your result

This is the wavelength-spectrum peak; converting it to frequency does not locate the frequency-spectrum peak.

What to keep in mind

This is the wavelength-spectrum peak; converting it to frequency does not locate the frequency-spectrum peak. An idealized educational model using the stated SI units. Real systems may need additional forces, losses or experimental measurements. Not a safety or equipment specification.

Common questions

How do I use this wien peak wavelength calculator?

Find the peak wavelength of blackbody spectral radiance per unit wavelength. Enter absolute temperature in K. The starting example is editable; use values for the same system or project.

Which assumptions affect this result?

This is the wavelength-spectrum peak; converting it to frequency does not locate the frequency-spectrum peak.

Methodology maintained by ClarityKit. How these tools are built and checked.