VR Headset Field of View (FOV) Calculator
Determine the potential horizontal FOV based on lens diameter and eye-to-lens distance.
Distance from your eye to the lens
Diameter of the VR headset lens
FOV = 2 * arctan(Diameter / (2 * Distance)) * (180 / π)
40mm lens at 20mm distance results in approximately 90 degrees FOV.
What is VR FOV?
Field of View (FOV) refers to the extent of the observable world seen through the headset lenses at any given moment. Horizontal FOV is the most commonly cited metric, representing the width of the view.
Why does FOV matter in VR?
Higher FOV increases immersion and "presence" by filling more of your peripheral vision, reducing the feeling of looking through a scuba mask or binoculars.
What affects a headset's FOV?
FOV is determined by the lens optics, display panel size, and most importantly, the distance between your eyes and the lenses (eye relief). Moving your eyes closer to the lenses typically increases the perceived FOV.
📐 Formula
FOV = 2 * arctan(Diameter / (2 * Distance)) * (180 / π)
📝 Example Calculation
40mm lens at 20mm distance results in approximately 90 degrees FOV.
❓ Frequently Asked Questions
What is VR FOV?▼
Field of View (FOV) refers to the extent of the observable world seen through the headset lenses at any given moment. Horizontal FOV is the most commonly cited metric, representing the width of the view.
Why does FOV matter in VR?▼
Higher FOV increases immersion and "presence" by filling more of your peripheral vision, reducing the feeling of looking through a scuba mask or binoculars.
What affects a headset's FOV?▼
FOV is determined by the lens optics, display panel size, and most importantly, the distance between your eyes and the lenses (eye relief). Moving your eyes closer to the lenses typically increases the perceived FOV.