How to use the camera field of view calculator
Find the angle of view a lens gives across the sensor or film width. Enter sensor width, focal length in the fields above; the horizontal field of view, angle in radians are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “angle of view”, “lens field of view”, “how wide is my lens”, “calculate camera field of view”, “find horizontal field of view”.
Formula
Variables
- w — Sensor width (mm)
- f — Focal length (mm)
Worked example
With sensor width = 36 mm, focal length = 50 mm, the calculator gives horizontal field of view ≈ 39.59775 °; angle in radians ≈ 0.6911112 rad.
Frequently asked questions
What is the camera field of view calculator used for?
Find the angle of view a lens gives across the sensor or film width. It helps with questions such as “angle of view”, “lens field of view”, “how wide is my lens”.
What is the formula for the camera field of view calculation?
Horizontal field of view (°) = 2 × atan(w / (2 × f)). Angle in radians (rad) = 2 × atan(w / (2 × f)). Here w is sensor width (mm), f is focal length (mm).
What inputs do I need for the camera field of view calculator?
You need sensor width in mm, focal length in mm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the camera field of view calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the camera field of view result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.