How to Use the Gaming FOV (Field of View) & Aspect Ratio Converter
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1
Select your display aspect ratio (e.g. 16:9 Standard, 16:10, 21:9 Ultrawide, or 32:9 Super Ultrawide).
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2
Enter your preferred Horizontal FOV (e.g. 103° in Overwatch) or Vertical FOV (e.g. 71° in Rainbow Six Siege).
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3
The calculator computes corresponding V-FOV, H-FOV (16:9), H-FOV (4:3 Base), and focal length scaling factor.
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4
Review the recommended FOV settings for popular games (Source Engine, Unreal Engine 5, Call of Duty, Apex Legends).
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5
Inspect the visual top-down cone showing your in-game peripheral vision angle.
Practical Example & Use Case
Common Real-World Scenario
Finding that a 103° Horizontal FOV on a 16:9 monitor equals a 70.53° Vertical FOV, allowing you to set the exact match in games that use vertical FOV scaling.
Technical Notes & Limitations
Browser Engine Architecture
Calculates rectilinear optical projection angles using standard trigonometric perspective formulas: `H-FOV = 2 × atan(tan(V-FOV / 2) × Aspect Ratio)`.
Frequently Asked Questions
Why do different games use Horizontal vs Vertical FOV?
Games using Vertical FOV (like Rainbow Six Siege or Battlefield) maintain constant vertical view regardless of monitor width, while Horizontal FOV scales with wider monitors.
What is the standard competitive FOV for FPS games?
Most competitive shooters use a Horizontal FOV between 90° and 103° (equivalent to ~59°–71° Vertical FOV).