Antenna Length Calculator

Enter operating frequency and antenna type to calculate element length, wavelength, and recommended dimensions.

Frequency

Frequency Unit

Antenna Type

Element Length

Wavelength (λ)

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Length (inches)

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Length (feet)

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Antenna Length Formulas

λ = c / f (c = 299,792,458 m/s)

Half-Wave Dipole: L = λ/2 × 0.95 (shortening factor)

Quarter-Wave: L = λ/4 × 0.95

Yagi: Reflector ≈ 0.495λ, Director ≈ 0.44λ

LC resonance.

RC circuit.

Wavelength.

PCB trace.

Op-amp gain.

Convert units.