WDM Channel Spacing Calculator
Calculate wavelength division multiplexing channel count, spacing, and aggregate bandwidth for CWDM and DWDM systems.
Inputs
Gbps
Results
Usable Channels
8
Total Bandwidth
80 Gbps
Channel Spacing0.8 nm
Channel Spacing100 GHz
Spectrum Used6.4 nm
Remaining Channels36
MUX + DEMUX Loss7 dB
Channels Fit (1=Yes)1
Cost Per Gbps$3.75
How to Use This Calculator
- Select WDM Type: CWDM (wide-channel, lower cost), DWDM (dense, 40–96 channels), or MWDM.
- Enter Channels Needed and Data Rate per Channel (Gbps) for your capacity requirement.
- Set Fiber Pairs available in your cable plant.
- Review Usable Channels, Total Bandwidth (Gbps), Channel Spacing (nm and GHz), and Spectrum Used.
- Check Channels Fit (1=Yes) and MUX + DEMUX Loss (dB) — add this to your optical power budget calculation.
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Formula
Total BW = Channels × Rate/Channel × Fiber PairsRelated Calculators
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