Sim Racing FOV Calculator
Rig Measurements
Measure the distance from the bridge of your nose to the center of your primary monitor while in your normal driving posture.
Calculated FOV Settings
In first-person shooters, cranking your Field of View (FOV) slider to 110 degrees is a competitive advantage because it allows you to see more of the battlefield. In sim racing, doing this will completely destroy your ability to judge braking distances.
Our Sim Racing FOV Calculator uses basic trigonometry to determine exactly how your game camera should be configured based on your real-world monitor setup. This ensures a 1:1 scale representation of the virtual track, tricking your brain into treating the monitor like a real windshield.
Why Mathematical FOV is Crucial
When you drive a real car, your brain uses binocular vision and depth perception to intuitively know exactly how far away a stop sign is.
A computer monitor is a flat 2D plane. If your FOV is set too high (a "fisheye" effect), corners will appear much further away than they actually are, causing you to brake late and overshoot the apex. If your FOV is set perfectly, the virtual distance matches the physical distance of your eyes to the monitor. This allows you to build genuine muscle memory for braking points.
How to Measure Screen Distance
Precision is key when setting up your FOV. Follow these steps:
- Sit in your sim rig (or desk chair) in your natural racing posture. Do not lean forward.
- Have a friend (or carefully do it yourself) hold a tape measure at the bridge of your nose (between your eyes).
- Extend the tape measure directly to the dead center of your primary monitor.
- Record this measurement in inches or centimeters and input it into the calculator.
Single Monitor vs. Triple Monitor Setups
This calculator is designed for single monitors (including ultrawides).
If you are running a triple monitor setup, the math becomes much more complicated as you must account for the physical angle of the side monitors. Most hardcore simulators like iRacing and Assetto Corsa Competizione (ACC) have built-in triple monitor configuration tools within their graphics menus that you should use instead of a generic web calculator.
Game-Specific FOV Settings (vFOV vs. hFOV)
Different game engines calculate their camera frustums differently. You must know which standard your game uses before entering the number into the settings menu.
- Vertical FOV (vFOV): iRacing, Assetto Corsa, Assetto Corsa Competizione, rFactor 2, Automobilista 2.
- Horizontal FOV (hFOV): The F1 Series (Codemasters), DiRT Rally 2.0, EA Sports WRC, Project CARS 2.
Our calculator provides both numbers simultaneously so you are covered regardless of what sim you are booting up.
Frequently Asked Questions
Why does my mathematically correct FOV feel so slow?
Correct FOV often limits your peripheral vision, eliminating the 'warp' effect at the edges of the screen that creates a false sense of speed. While it feels slower, your brain is now receiving accurate depth perception, allowing for more consistent braking points.
What is the difference between vFOV and hFOV?
vFOV stands for Vertical Field of View (measured top to bottom). hFOV stands for Horizontal Field of View (measured left to right). Different game engines use different standards.
Is it okay to increase my FOV slightly?
If you are playing on a very small single monitor pushed far away, the mathematically correct FOV might be unplayably narrow (e.g., 20 degrees). In these cases, it is acceptable to increase the FOV slightly just so you can see the apex of corners, but try to bring the monitor closer first!
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