Fov Calculator
Calculate the Field of View (FOV) based on sensor size and focal length.
Published by:
isCalculator Editorial Team
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How to use this tool?
How to Use the FOV Calculator
- Enter Sensor Dimensions – Input the sensor width and height in millimeters (e.g., 36 mm for full-frame width).
- Enter Lens and Distance – Provide the focal length in millimeters (e.g., 50 mm) and the distance to your subject in meters (e.g., 10 m).
- Select Dimension – Choose Horizontal, Vertical, or Diagonal to define which sensor axis to use for the field of view calculation.
- Calculate – Click the Calculate button. The result shows the angular FOV in degrees and the linear width (in meters) at your specified distance.
Note: All inputs must be positive numbers. The calculator uses metric units (mm for sensor and focal length, m for distance). The formula is: FOV = 2 × arctan( sensor dimension / (2 × focal length) ).
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Frequently Asked Questions
Field of View (FOV) is the extent of the observable world seen through a camera lens at a given distance.
FOV is calculated using the formula: FOV = 2 * arctan( sensor_dimension / (2 * focal_length) ), where sensor_dimension is the width, height, or diagonal of the sensor.
Sensor dimensions and focal length are in millimeters. Distance is in meters. FOV is output in degrees and the linear width at the subject distance in meters.