The tools

A growing library of focused, accurate RF calculators. Each tool runs entirely in your browser — no signup, no tracking, no math homework.

Transmission lines

Matching & reflection

VSWR / return loss →

Convert between VSWR, return loss, |Γ|, mismatch loss, and reflected/transmitted power.

Live

Smith chart

Interactive Smith chart for impedance matching and stub design.

Coming soon

L-network match

Two-element matching network design with component values.

Coming soon

Antennas & links

Friis link budget →

Free-space path loss, EIRP, received power, and link margin from the Friis equation.

Live

Antenna aperture & gain

Convert between aperture, gain, and effective area.

Coming soon

Dipole & monopole

Resonant length, impedance, and radiation pattern basics.

Coming soon

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