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FOV Measuring Tool by Miami Mike

This is a custom background for the HTC Vive that surrounds the user with a 360 degree measuring tool marked in 5 degree increments. You can use this to find your true horizontal field of view by simply holding your head steady and reading the angle markings at the left and right edges of your field of vision.

To use the tool, position your head so that the 0 degree mark is lined up with the left edge of your vision while you're looking left, then hold your head steady, look right, and read your horizontal field of view at the right edge.

To verify your reading, take additional readings while facing other directions, in each case subtracting the left-edge reading from its corresponding right-edge reading. The result should be the same facing all directions.

What you'll be reading is a direct observation of your true field of view, independent of any calculations or claims you may have encountered.

To select the Field of View Measuring Tool while in SteamVR, go to Settings -> VR Settings -> Customize -> Background.