Blackbody Radiation Peak Converter

How to Use

1. 1Choose mode: 'Temperature → Peak wavelength' or 'Wavelength → Temperature'
2. 2In Temperature mode: enter temperature and select unit (K, °C, or °F)
3. 3In Wavelength mode: enter peak wavelength and select unit (nm, μm, Å, etc.)
4. 4Results show: peak wavelength in all 6 units, temperature in all 3 units
5. 5Peak frequency (Hz, THz, GHz) and photon energy (J, eV) are shown automatically
6. 6Spectrum region badge identifies the type of radiation at the peak
7. 7Hover any result row to copy the value to clipboard
8. 8Open the reference table for notable blackbody temperatures and their peak wavelengths

Features

• Two modes: Temperature → Peak wavelength and Wavelength → Temperature
• Temperature units: Kelvin, Celsius, Fahrenheit
• Wavelength units: m, nm, μm, Å, mm, cm
• Peak frequency in Hz, THz, GHz
• Photon energy at peak in Joules and eV
• Automatic spectrum region identification: gamma/X-ray → UV → visible → IR → far-IR
• Color badge for visible spectrum wavelengths (violet, blue, green, yellow, red)
• Quick-reference: Sun, incandescent bulb, human body, CMB, blue star, red-hot iron
• Wien constants: b = 2.897771955×10⁻³ m·K (wavelength form)
• 100% browser-based - no server

Frequently Asked Questions