A sim racing FOV calculator computes the mathematically correct field of view for your exact monitor setup and sitting distance. Most sim racers use FOV that's 30-50° too high, which distorts depth perception and makes braking points look different from real life. Enter your setup below to get your exact correct FOV.
Monitor Setup
Monitor Specifications
Typical: 20-40° (the angle each side screen is angled outward)
Sitting Distance
Your Correct FOV
Game-Specific Settings
How to Use the Sim Racing FOV Calculator
The sim racing FOV calculator uses the same mathematical formula used by professional sim racers and racing simulators: FOV = 2 × arctan(screen_width / (2 × distance)). This formula computes the exact angle your screen occupies in your field of vision, which is the correct FOV for a realistic driving simulation.
Step 1: Select Monitor Setup
Choose single monitor for a standard setup, or triple screen if you have three monitors arranged around your rig. Triple screen FOV calculations account for the angled side screens — each screen is offset from center, which requires trigonometric calculation of each screen's angular contribution.
Step 2: Enter Monitor Size and Aspect Ratio
Enter your monitor's diagonal screen size in inches or centimeters (toggle units at the top). Select your aspect ratio — 16:9 is standard for most gaming monitors, 21:9 is common for ultrawide, and 32:9 is for super-ultrawide triple-equivalent monitors. The calculator derives the screen width from diagonal and aspect ratio.
Step 3: Measure Your Sitting Distance
Measure the distance from your eyes to the screen surface when you're in your normal driving position. This is the most important input — even small changes in sitting distance significantly affect the result. Sit in your rig in your normal driving posture before measuring.
Step 4: Apply in Your Game
Copy the horizontal FOV value into your game's settings. For games using vertical FOV (F1 series), use the vertical FOV value shown. Start with the exact calculated value — most sim racers find it looks strange for the first session but feels much more intuitive after 30-60 minutes of adjustment time.
Frequently Asked Questions
Is this sim racing FOV calculator free?
Yes, completely free with no signup. All calculations run locally in your browser.
Why does correct FOV matter in sim racing?
Most sim racers use too high an FOV (70-90°) which makes the game feel 'zoomed out' and distorts depth perception. This makes it hard to judge braking points accurately — because in real life, your FOV relative to a steering wheel is only 30-45°. Using correct FOV dramatically improves car placement, braking precision, and immersion.
What FOV should I use for iRacing?
iRacing uses horizontal FOV. For a typical 27-inch monitor at 65cm distance, correct FOV is approximately 36-40°. In iRacing settings, enter the calculated horizontal FOV directly. Most iRacing tutorials recommend the same mathematical approach this calculator uses.
Does Assetto Corsa Competizione use horizontal or vertical FOV?
ACC uses horizontal FOV. Enter the calculated horizontal FOV directly in the ACC settings. ACC's default FOV of 59° is way too high for most setups — your calculated value will likely be 35-50° depending on your screen distance.
How does F1 game FOV differ?
F1 games (Codemasters EA Sports F1 series) use vertical FOV. To convert, multiply your calculated horizontal FOV by the height/width aspect ratio. For 16:9 screens: vertical FOV = horizontal FOV × (9/16). For a 38° horizontal FOV on a 16:9 screen, vertical FOV ≈ 21°.
Will correct FOV look wrong at first?
Yes — if you're used to high FOV, correct FOV will look too 'zoomed in' initially. This is actually correct and realistic: a real car's windshield is narrow relative to your total vision. Give it 2-3 hours of driving and you will quickly adapt, and your braking points and car placement will improve noticeably.
How do I calculate FOV for triple screens?
For triple screens, each screen is angled outward. This calculator handles triple screen setups — select 'Triple Screen' and enter the angle between screens. Each screen gets its own FOV based on its individual width and distance, and the total horizontal FOV is the sum of all three.