Numerical Aperture
Calculate Numerical Aperture instantly with the exact formula and a worked example. Free online calculator — no signup, works on mobile.
Numerical Aperture
n × sin θ
NA
0.5
More about: Numerical Aperture
What it calculates
The “Numerical Aperture” calculator computes NA from 1 parameter: n × sin θ.
A standard physics formula used in educational and engineering tasks.
Example calculation
With parameters n × sin θ = 0.5 the result is 0.5.
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.