Attenuation Calculator
Use the Attenuation Calculator for a transparent, instant calculation with validated inputs and cited sources. For a query such as “attenuation”, enter the matching values and units below and review the stated assumptions.
How to use this calculator
Enter the requested values and units.
Review the assumptions and any warnings shown with the result.
Use the result together with the cited source and your real-world requirements.
Formula
Power attenuation in decibels = 10 × log₁₀(input power ÷ output power); attenuation per distance divides that result by path length.
Worked example
Worked example: Inputs: Input power: 100; Output power: 25; Path length: 10. Outputs: Power attenuation: 6.0206 dB; Attenuation per distance: 0.60206 dB/unit.
Assumptions and limits
- The result depends on the values, units, and assumptions entered. It does not infer missing context.
Sources
- National Institute of Standards and Technology: NIST Guide to the SI, Chapter 5: Units Outside the SIReference material reviewed for the stated method, units, or domain. Confirm that its scope matches your use case. Reviewed 2026-08-14.
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Frequently asked questions
How does the Attenuation Calculator work?
Power attenuation in decibels = 10 × log₁₀(input power ÷ output power); attenuation per distance divides that result by path length.
What should I enter?
Input power, Output power, Path length
What should I verify?
Review the assumptions and any warnings shown with the result. The result depends on the values, units, and assumptions entered. It does not infer missing context.
Last updated 2026-08-14 · science-attenuation-v1 · opportunity-content-2026-08-14 · Trusty Calculator Editorial Team