Home RF Pathloss Calculator

Terrain · Fresnel clearance · free-space loss · selectable diffraction models

Path

Frequency (MHz)

Effective Earth k

Terrain samples

Diffraction model

Sites

TX site

Grid

Latitude

Longitude

Antenna height AGL (m)

Antenna gain (dBi)

Ground AMSL: —

RX site

Grid

Latitude

Longitude

Antenna height AGL (m)

Antenna gain (dBi)

Ground AMSL: —

Place TX and RX on the map, then calculate.

Results

Distance

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Free-space loss

—

Diffraction loss

—

Basic propagation loss

—

Effective connector loss

—

LOS / Fresnel

—

—

Terrain cross-section

No path calculated

Terrain + effective Earth curvature Direct TX–RX ray 60% first Fresnel zone 100% first Fresnel zone (faint) Diffraction control point(s)