Distance-based optical loss by wavelength.
Last Updated: 17 Feb 2026
Fibre Attenuation Calculator
ITU-T style presets: SMF (G.652D) about 0.35 dB/km at 1310 nm and 0.22 dB/km at 1550 nm.
MMF typical values are higher and depend on OM class and source bandwidth.
Total distance loss: 4.20 dB
Fibre Attenuation Calculator helps you distance-based optical loss by wavelength. It is commonly used by domain specialists, operations teams, learners for fiber attenuation, 1310 1550, smf mmf loss.
Fibre Attenuation Calculator
Distance-based optical loss by wavelength.
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- For planning and education; verify critical decisions with qualified professionals.
Disclaimer: Specialty calculators provide rough estimates for planning and education, not professional engineering, tax, or legal advice.