Field of View Calculator
Calculate the horizontal, vertical, and diagonal angular field of view for any lens and sensor size combination.
Results
What is it?
Field of view (FoV) — sometimes called angle of view — is the angular extent of the scene captured by a lens and sensor combination, expressed in degrees. A wide-angle lens (e.g. 24 mm on full frame) captures roughly 84° horizontally, while a telephoto (200 mm) captures only about 10°.
How to use
Enter the focal length of your lens and the physical dimensions of your sensor. The calculator returns horizontal, vertical, and diagonal angles. Use the diagonal FoV to match lens coverage against projection or display specifications.
Example scenario
A 50 mm lens on a full-frame sensor (36 × 24 mm) gives ≈ 39.6° horizontal FoV — close to human natural vision. The same lens on an APS-C body (23.5 × 15.6 mm) yields ≈ 26.5° H-FoV, equivalent to a ~75 mm full-frame lens.
Pro tip
Manufacturers quote diagonal FoV for marketing because it produces the largest number. When comparing security cameras, drones, or projectors, always compare the same axis (horizontal or vertical) to avoid misleading comparisons.