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Link margin

Calculate Link margin instantly with the exact formula and a worked example. Free online calculator — no signup.

Link margin

P_t, dBm
G_t + G_r, dB
Loss, dB
Sensitivity, dBm
Link margin
50dB
margin = P_t + G − Loss − SensCalculate Link margin instantly with the exact formula and a worked example. Free online calculator — no signup.
Margin
50 dB

More about: Link margin

What it calculates

The “Link margin” calculator computes Link margin in dB from 4 parameters: p_t, dbm, g_t + g_r, db, loss, db, sensitivity, dbm.

A standard physics formula used in educational and engineering tasks.

Example calculation

With parameters P_t, dBm = 30, G_t + G_r, dB = 30, Loss, dB = 100, Sensitivity, dBm = -90 the result is 50 dB (margin = P_t + G − Loss − Sens).

How to use

  1. Enter the parameter values — every field above is adjustable with a slider.
  2. The result and related metrics are calculated automatically as you type.
  3. Use the additional metrics shown (if any) where needed.
  4. Copy the result or bookmark the page.

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