Circle Of Confusion Calculator
Calculate optical Circle of Confusion (CoC) in mm and microns from camera sensor dimensions, print size, viewing distance, and visual acuity.
Open toolCamera Field Of View Calculator
Enter your camera sensor width and height, lens focal length, and subject distance in the Camera Field Of View Calculator below to compute horizontal, vertical, and diagonal angles of view plus exact scene coverage in meters and feet.
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Enter the inputs, then select Calculate Field of View.
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How Camera Field Of View Calculator works
The Camera Field Of View Calculator applies rectilinear trigonometry to your sensor dimensions and focal length to compute angular FOV in degrees and projects that triangle out to your subject distance to find linear frame width, height, and diagonal.
HFOV = 2 * arctan(W / (2*f)); VFOV = 2 * arctan(H / (2*f)); Frame Width = Distance * (W / f).
Also computes sensor diagonal in mm, diagonal crop factor relative to 36x24 mm full frame, and 35mm equivalent focal length.
Camera Field Of View Calculator Quick Reference & Input Guide
Review the input parameters, allowed value ranges, and worked reference cases for the Camera Field Of View Calculator below before running your calculation.
| Parameter / Scenario | Default / Sample Value | Rule or Allowed Range | Output / Usage Note |
|---|---|---|---|
| Input: Sensor width | 36 | Range: 1 to 200 | Required workspace parameter |
| Input: Sensor height | 24 | Range: 1 to 200 | Required workspace parameter |
| Input: Lens focal length | 50 | Range: 1 to 5000 | Required workspace parameter |
| Input: Subject distance | 10 | Range: 0.1 to 100000 | Required workspace parameter |
| Worked Case 1: 50 mm lens on Full Frame (36 x 24 mm sensor at 10 m distance) | Preloaded / test values | Angle of View = 2 * arctan(SensorDimension / (2 * FocalLength)); Scene Dimension = Distance * (SensorDimension / FocalLength) | Horizontal AOV is 39.60 deg, Vertical AOV is 26.99 deg, and Diagonal AOV is 46.79 deg (crop factor 1.00x). At 10 m (32.81 ft), the frame captures a scene 7.20 m wide by 4.80 m tall (23.62 x 15.75 ft). |
| Worked Case 2: 16 mm wide lens on APS-C (23.5 x 15.6 mm sensor at 3 m distance) | Preloaded / test values | Angle of View = 2 * arctan(SensorDimension / (2 * FocalLength)); Scene Dimension = Distance * (SensorDimension / FocalLength) | Diagonal crop factor is 1.53x (24.5 mm full-frame equivalent). Horizontal AOV is 72.58 deg and Vertical AOV is 51.96 deg, capturing a 4.41 m x 2.93 m frame at 3 m distance. |
How to use Camera Field Of View Calculator step by step
Look up your camera's active sensor size in millimeters and enter your lens focal length and shooting distance.
Enter active sensor width and height in mm
Input your sensor's width and height in millimeters (for example, 36 and 24 for Full Frame, or 23.5 and 15.6 for APS-C).
Set actual optical lens focal length
Enter the physical focal length printed on the lens barrel (e.g., 50 mm), not the crop-equivalent number.
Enter subject distance and inspect frame coverage
Set the distance to your subject in meters and click Calculate Field of View to see angular FOV and scene coverage in meters and feet.
Worked examples for Camera Field Of View Calculator
Compare a 50mm lens on a Full Frame body against a 16mm lens on an APS-C camera.
50 mm lens on Full Frame (36 x 24 mm sensor at 10 m distance)
Horizontal AOV is 39.60 deg, Vertical AOV is 26.99 deg, and Diagonal AOV is 46.79 deg (crop factor 1.00x). At 10 m (32.81 ft), the frame captures a scene 7.20 m wide by 4.80 m tall (23.62 x 15.75 ft).
16 mm wide lens on APS-C (23.5 x 15.6 mm sensor at 3 m distance)
Diagonal crop factor is 1.53x (24.5 mm full-frame equivalent). Horizontal AOV is 72.58 deg and Vertical AOV is 51.96 deg, capturing a 4.41 m x 2.93 m frame at 3 m distance.
Always enter physical lens focal length
An APS-C lens marked '16mm' has a true 16 mm optical focal length; entering your 23.5 x 15.6 mm sensor size already accounts for the 1.53x crop.
How to interpret the Camera Field Of View Calculator output
Use Angular FOV for lens comparison and Scene Coverage for studio, stage, or security camera placement.
The headline result displays Horizontal x Vertical Angle of View in degrees (plus Diagonal AOV). Breakdown cards list Scene Width and Height at your distance (in meters and feet), Sensor diagonal & crop factor, and 35mm equivalent focal length.
Input limits, assumptions, and related tools
Keep rectilinear distortion vs. fisheye projection in mind for ultra-wide lenses.
These formulas model rectilinear lenses (where straight lines in the scene render straight). Stereographic or equisolid fisheye lenses have a wider angular field of view for the same focal length. For focus zone depth, pair this tool with the Circle Of Confusion Calculator and Depth Of Field Calculator.
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Open toolCamera Field Of View Calculator: common questions
Answers about using Camera Field Of View Calculator and understanding its results.
What is the formula for camera angle of view (AOV) and field of view (FOV)?
For a rectilinear lens focused near infinity, Angle of View (in degrees) = 2 * arctan(d / (2 * f)) * (180 / pi), where d is sensor width, height, or diagonal in mm and f is focal length in mm. Linear Field of View at distance D equals D * (d / f).
What sensor dimensions should I enter for Full Frame, APS-C, or Micro Four Thirds?
Standard Full Frame (35mm) is 36 x 24 mm (diagonal 43.27 mm). Sony/Nikon/Fuji APS-C is 23.5 x 15.6 mm (Canon APS-C is 22.3 x 14.9 mm). Micro Four Thirds is 17.3 x 13.0 mm, and 1-inch type sensors are 13.2 x 8.8 mm.
How is 35mm equivalent focal length calculated?
The diagonal crop factor compares the 35mm full-frame diagonal (43.2666 mm) to your sensor's diagonal sqrt(W^2 + H^2). Multiplying your actual lens focal length by that crop factor gives the 35mm equivalent focal length.
Does focus breathing or macro extension narrow the field of view?
Yes. At close focus distances where magnification m is significant, the effective focal length increases to f * (1 + m), which narrows the angle of view compared to infinity focus.
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