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Lens Calculator

Please note: calculations are for guidance only

Calculate Focal Length

To calculate the focal length, you need to:

  • select the sensor
  • enter the distance to the scene (in m or ft)
  • enter the width OR the height of the scene (in m or ft)
1/4-inch Sensor
1/3-inch Sensor
1/2-inch Sensor
2/3-inch Sensor
1-inch Sensor
Distance (m or ft)
Size of Scene (m or ft) Width Height
Width (m or ft)
Image of arrow
Height (m or ft) Image of arrow Image of scene Distance to scene/object (m or ft) Image of camera
Image of arrow
Focal length (mm)