Aperture Area Calculator
Free calculate the area of an opening through which light or waves pass in optical systems. Get instant, accurate results with our easy-to-use calculator.
Input Parameters
Results
Enter parameters to calculate aperture area
Aperture Area Formula
Formulas
Circle: A = πr² = πD²/4
Square: A = s²
Rectangle: A = w × h
Where:
- • A = area (m²)
- • r = radius (m)
- • D = diameter (m)
- • s = side length (m)
- • w, h = width, height (m)
Common Apertures
- • Camera lens f/1.4: ~50 mm²
- • Telescope (10 cm): ~7854 cm²
- • Human pupil: ~7-38 mm²
- • Radio telescope: varies widely