Field of View Calculator
The angle of view tells you how wide a slice of the world a lens captures, and it depends on both the focal length and the size of your sensor. This calculator uses the standard formula, angle equals two times the arctangent of the sensor dimension divided by twice the focal length, to give you the horizontal, vertical, and diagonal field of view in degrees. Enter your focal length and pick a sensor format, or type custom sensor dimensions, and you get all three angles instantly. A short focal length on a large sensor produces a wide sweeping view for landscapes and interiors, while a long focal length narrows the angle for portraits and wildlife. Knowing the exact angle helps you choose a lens for a scene, plan a panorama, or estimate coverage. Everything is calculated in your browser with nothing sent to a server.
How to use Field of View Calculator
- Enter your focal length.
- Select your sensor size.
- Read the horizontal, vertical, and diagonal field of view in degrees.
- Compare focal lengths to frame a scene.
Frequently asked questions
How is angle of view calculated?
It uses the sensor dimension and focal length in an arctangent formula to return the horizontal, vertical, and diagonal field of view in degrees.
Why does sensor size change the angle?
A larger sensor captures a wider slice of the projected image at the same focal length, so field of view widens as sensor size grows.
What focal length gives a natural view?
On full frame a 50 mm lens gives roughly a 40 degree horizontal view, often called natural, while wider lenses increase the angle and telephotos narrow it.
What is Field of View Calculator?
The angle of view tells you how wide a slice of the world a lens captures, and it depends on both the focal length and the size of your sensor. This calculator uses the standard formula, angle equals two times the arctangent of the sensor dimension divided by twice the focal length, to give you the horizontal, vertical, and diagonal field of view in degrees.
Is Field of View Calculator free to use?
Yes. Field of View Calculator is completely free, with no sign-up and no usage limits.
Does Field of View Calculator work in a web browser?
Yes. Field of View Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Field of View Calculator?
Yes. Field of View Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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