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FOV Size Reference

Shared guide index: README.md

Use these tables to map base resolution to cropped resolution.

How to Use

Base Resolution corresponds to your desktop or game resolution. Find the table that matches your desktop resolution, then select your desired FOV value.

Example: - If your desktop resolution is 2560x1440, refer to the "## 2560x1440" table - Then select your desired FOV value, for example 128 - The corresponding Cropped Resolution is 1216x656, which are the crop values you need to fill in the OBS Crop/Pad filter

Formula (Any Aspect Ratio)

If your resolution is not listed below, calculate it with this formula.

Given:

  • BaseW = base width
  • BaseH = base height
  • FOV = selected FOV value

Output resolution:

CroppedW = (BaseW - FOV) / 2
CroppedH = (BaseH - FOV) / 2

If you need OBS Crop/Pad values (center crop):

Left   = Right  = (BaseW + FOV) / 4
Top    = Bottom = (BaseH + FOV) / 4

Validation:

  • FOV < BaseW and FOV < BaseH (otherwise output becomes zero/negative)
  • Use even numbers to avoid decimals (32-step values are commonly used)

Example (also works for 21:9):

BaseW = 5120, BaseH = 1440, FOV = 320
CroppedW = (5120 - 320) / 2 = 2400
CroppedH = (1440 - 320) / 2 = 560
Left=Right=(5120+320)/4=1360
Top=Bottom=(1440+320)/4=440

Custom Resolution FOV Calculator

Enter custom width/height and select FOV to get cropped resolution and OBS Crop/Pad values.

Resolution Reference Tables

Select the reference table for your resolution: