Focal Length/FOV Lens Calculator

This focal length to FOV lens calculator is a first order calculator and is very useful for most machine vision applications*.

NOTE: WD and FOV must be in the same units (e.g. in, ft, etc.).

WD - Working Distance - distance from the front of the lens
FOV - Field of View, width of picture FL - focal length of the lens.

*If your magnification is outside of 0.1 to 10, or ratio of WD/FOV is very high or low (0.05 to 20), or your FOV/Sensor size is very high or low, or you have a very short WD (less than 100mm), or have any questions, contact us first!

Need Even More Precision and Magnification?
Navitar High Mag Lenses or Navitar Resolv4K® Zoom Lenses

Focal Length/FOV Calculator by Sensor Size

Please select the sensor size.

Please select the horizontal or vertical dimension that you want to calculate

Horizontal Vertical

Enter two of the three values below.




Focal Length/FOV Calculator by Pixels

Enter number of pixels, pixel size and WD, and FOV or FL.

Number of Pixels: Horizontal Vertical

Pixel Size (µm): Horizontal Vertical


FOV: Horizontal Vertical

FL: Horizontal Vertical

NOTE: 1stVision is not responsible for errors in calculations. Please check your work.

By using this calculator I agree to assume all responsibility and any liability associated with using this tool. Furthermore, I understand that I am responsible for independently verifying any applications that I produce with these tools.

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