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Photon Calculator

Enter any photon quantity and all others update in real time. The chart shows the electromagnetic spectrum with common laser lines, spectral bands, and your operating point.

v1.0.0·Updated 2026-06-10
Model & Assumptions Stable
Model
Direct photon energy–momentum relations: E = hc/λ = ℏω, ν = c/λ, ν̄ = 1/λ.
Assumptions
Free-space photon (vacuum speed of light). Constants from CODATA 2018.
Limitations
Does not account for refractive index of a medium. Purely kinematic — no interaction or dispersion effects.

Parameters

Region

Photon relations. E = h c/λ = ℏω,   ν = c/λ,   T = 1/ν,   ẋ = 1/λ. h c ≈ 1239.84 eV·nm. Constants: CODATA 2018.

Electromagnetic spectrum — λ, E, and common lasers
Bands UV Visible NIR SWIR MIR / LWIR
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