EVERYDAY CLARITY
Field Of View Calculator
What angular field of view follows from focal length and sensor dimension? Enter the stated values to calculate this model.
Your result
Field-of-view angle
degree
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Sensor width, height or diagonal (mm) | Enter sensor width, height or diagonal in mm; use the same basis as the other measurements. |
| Focal length (mm) | Enter focal length in mm; use the same basis as the other measurements. |
Understanding your result
Read Field-of-view angle (degree) in the units and model stated on this page. The formula angle=2*atan(sensor/(2*focal))*180/pi defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
What angular field of view follows from focal length and sensor dimension?
What angular field of view follows from focal length and sensor dimension? Enter the stated values to calculate this model.
Common uses
- What angular field of view follows from focal length and sensor dimension
How it works
angle=2*atan(sensor/(2*focal))*180/pi
Worked example
Enter Sensor width, height or diagonal: 36 mm; Focal length: 18 mm. Results: Field-of-view angle: 90 degree.