FOV Calculator
Convert horizontal to vertical FOV for a rectilinear projection and the entered aspect ratio. Confirm which FOV convention your game uses.
73.7 deg
Vertical FOV for the selected aspect ratio.
Gaming Calculators Hub
Quick calculators for the setup questions that slow gamers down: field of view, screen size, viewing distance, aspect ratio, download time, and time to kill.
Viewing Distance
Get an adjustable starting suggestion from this site's heuristic. It is not a validated ergonomic or visual-acuity standard.
23-31 in
Heuristic suggestion only; adjust for readable text, posture, and your actual desk.
Aspect Ratio
Reduce any resolution to its simplest aspect ratio.
16:9
Reduced ratio and decimal value.
Download Time
Estimate how long a game download takes on your connection.
38 min
Uses decimal GB and Mbps; assumes constant throughput and excludes protocol overhead, installation, and decompression.
Screen Size
Find physical width and height from diagonal size and aspect ratio.
23.5 x 13.2 in
Physical panel width and height.
TTK Calculator
Calculate an ideal interval from the first hit to the final required hit. Assumes constant damage, all shots hit, and a fixed fire rate; excludes armor, range changes, reloads, projectile travel, and network delay.
300 ms
4 shots total; timing starts at the first hit.
How these calculators fit your setup
Worked TTK example: 100 health ÷ 30 damage requires 4 hits after rounding up. At 600 rounds per minute, hits are 100 ms apart. There are 3 intervals from the first hit to the fourth, so ideal TTK is 300 ms under the assumptions above.
Viewing-distance heuristic: the starting value in inches is PPI ÷ 4.7 + (diagonal inches − 27) × 0.35, limited to 18-42 inches; the displayed range extends 8 inches beyond it. For 27 inches and 109 PPI, this gives approximately 23-31 inches after rounding. These constants are site choices, not a published physical standard.
Check configured hardware DPI first and tune game sensitivity inside the game. The browser ruler tool estimates CSS cursor output, while the sensitivity converter provides a starting value to verify with a physical turn. FOV and screen calculations answer separate geometry questions.
For a deeper setup walkthrough, read the new guide: How to Use Gaming Calculators to Tune Your Setup.