RF coaxial cable attenuation calculator

Calculate interpolated loss per 100m and estimated cable loss with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use interpolated loss per 100m and estimated cable loss to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Supplier frequency MHz, loss dB per 100m table
[[100,5],[1000,15],[3000,30]]
Operating frequency (MHz)
1500
Cable length (m)
20
Interpolated loss per 100m (dB)
18.75
Estimated cable loss (dB)
3.75

Try another scenario

Supplier frequency MHz, loss dB per 100m table
[[100,5],[1000,15],[3000,30]]
Operating frequency (MHz)
2000
Cable length (m)
20
Interpolated loss per 100m (dB)
22.5
Estimated cable loss (dB)
4.5
Calculation method

Calculation method

Interpolated loss per 100m (dB)

Linear interpolation within supplier table; no extrapolation.

Estimated cable loss (dB)

Interpolated loss × cable length/100.

Symbols and units
a
Supplier frequency MHz, loss dB per 100m table
b
Operating frequency (MHz)
c
Cable length (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Supplier frequency-loss table, cable length. Returns Interpolated feedline loss. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Operating frequency (MHz): minimum 1e-12, maximum 1000000000000.0. Cable length (m): minimum 0, maximum 1000000000000.0.
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Further reading

Method reference ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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