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Fibre Optic Loss Budget Calculator

Calculate remaining optical power budget from transmit power, receiver sensitivity, and component losses in dB.

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Available budget = Tx power (dBm) − receiver sensitivity (dBm); remaining margin = available budget − sum of losses (dB). No link compliance guarantee. Transmit power and receiver sensitivity in dBm may be negative. Total losses must be non-negative; remaining margin may be negative.

Remaining optical margin (dB):

A QUICK WALKTHROUGH

How to use this tool

  1. Enter measured or specified values in the displayed units.
  2. Review the assumptions and excluded factors.
  3. Calculate locally in your browser.

Formula and scope

Available budget = Tx power (dBm) − receiver sensitivity (dBm); remaining margin = available budget − sum of losses (dB). No link compliance guarantee. This does not certify code compliance, safety, equipment performance, or a link budget.

Privacy

Inputs are calculated locally and are not uploaded.

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Common questions

Does this approve equipment sizing?

No. It applies the displayed arithmetic only.

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