Calculate vertical FOV from horizontal FOV and aspect ratio, or vice versa. Convert between FOV types for any resolution and aspect ratio.
Field of View (FOV) determines how much of the game world you see. Games define FOV as either horizontal or vertical, and the value changes depending on your aspect ratio. This calculator converts between FOV types.
A wider FOV shows more of the environment but makes distant targets smaller. A narrower FOV zooms in for better target identification at range but limits peripheral vision. Finding the right balance depends on your game and play style.
The relationship between horizontal and vertical FOV depends on your monitor's aspect ratio. This calculator handles the trigonometric conversion for any resolution.
Gamers, streamers, and content creators benefit from precise fov data when optimizing their setup, planning purchases, or maximizing performance and value. Bookmark this tool and return whenever your hardware, games, or streaming requirements change.
From casual players to competitive esports enthusiasts, knowing your precise fov numbers empowers smarter hardware investments, streaming decisions, and long-term upgrade planning. Adjust the inputs above to mirror your actual setup and discover optimizations you may have overlooked.
From casual players to competitive esports enthusiasts, knowing your precise fov numbers empowers smarter hardware investments, streaming decisions, and long-term upgrade planning. Adjust the inputs above to mirror your actual setup and discover optimizations you may have overlooked.
Different games use different FOV definitions (horizontal vs vertical, measured differently). Converting between them ensures you get the same actual visual field regardless of which game you're configuring, preventing unexpected zoom or fish-eye effects. Instant results let you compare different configurations and scenarios quickly, helping you get the best performance and value from your gaming budget.
vFOV = 2 × atan(tan(hFOV/2) × height/width) hFOV = 2 × atan(tan(vFOV/2) × width/height)
Result: Vertical FOV: 70.5°
vFOV = 2 × atan(tan(103/2 × π/180) × 1080/1920) × 180/π = 70.5°. CS2's FOV 90 setting is actually 106.26° horizontal at 16:9, which equals 73.74° vertical.
Field of View is measured as the angle between the left and right (horizontal) or top and bottom (vertical) edges of your view frustum. The conversion between them involves trigonometry because perspective projection is non-linear.
Higher FOV provides more information — you can see enemies at screen edges that would be invisible at lower FOV. This is why most competitive players maximize FOV within game limits.
Ultrawide (21:9) and super-ultrawide (32:9) monitors provide naturally wider horizontal FOV when games use vertical FOV. This is considered an acceptable advantage since it comes from hardware rather than settings manipulation.
Most competitive players use 100-110° horizontal FOV. This provides wide peripheral vision without making targets too small. At 16:9, this corresponds to about 70-80° vertical FOV.
Vertical FOV stays consistent regardless of aspect ratio. If a game uses vertical FOV, ultrawide and standard monitor players see the same amount vertically but ultrawide sees more horizontally, which is the natural advantage of a wider display.
FOV doesn't change actual sensitivity, but it changes perceived sensitivity. At higher FOV, camera movement appears slower on screen, which can affect aim feel. Some players slightly increase sensitivity when increasing FOV to compensate.
At 21:9 with 90° vertical FOV, you get approximately 121° horizontal FOV. This is significantly wider than the 106° horizontal at 16:9 with the same vertical FOV setting.
Very high FOV (130°+) creates a fish-eye distortion effect and makes targets very small at distance. Performance may also suffer. Most players find 100-110° to be the practical maximum.
If the game uses horizontal FOV and you change to a different aspect ratio, the vertical FOV changes. Going from 16:9 to 4:3 at the same horizontal FOV narrows your vertical view, creating a "zoomed in" effect.