Beam width
Calculate Beam width instantly with the exact formula and a worked example. Free online calculator — no signup.
Beam width
λ, m
Antenna D, m
Beam width
2.1°
θ
2,1°
More about: Beam width
What it calculates
The “Beam width” calculator computes Beam width in ° from 2 parameters: λ, m, antenna d, m.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters λ, m = 0.03, Antenna D, m = 1 the result is 2.1 ° (≈ 70°·λ/D).
How to use
- Enter the parameter values — every field above is adjustable with a slider.
- The result and related metrics are calculated automatically as you type.
- Use the additional metrics shown (if any) where needed.
- Copy the result or bookmark the page.