The difference in spatial efficiency among these three layouts essentially represents a trade-off between «freeing up desktop space for the mouse» and «retaining dedicated keys for productivity.» In FPS gaming, the horizontal width of the keyboard is the primary metric; the 65% layout offers the highest spatial efficiency, while the 98% layout offers the lowest. In an office environment, the absence of a number pad and dedicated navigation/editing keys directly increases the «operational cost» (i.e., the effort required to perform tasks); here, the 98% layout is the most efficient, whereas the 65% layout demands the greatest investment in terms of learning and extra keystrokes. The 75% layout serves as the optimal middle ground between the two.
I. Physical Dimensions and Spatial Footprint
There is a significant disparity in horizontal width among these three layouts. Taking common mass-produced models as an example, a 65% keyboard typically measures between 290–320mm in width. A 75% keyboard—which retains the function (F) row and a column of navigation/utility keys on the right—measures between 320–340mm. A 98% keyboard, which keeps the number pad while condensing the navigation/editing cluster, generally spans about 380–400mm.
In the context of FPS gaming, this 60–80mm difference in width directly dictates the available sliding space for the mouse. For players who use low sensitivity settings, the mouse often requires wide, sweeping movements; for every 1cm reduction in keyboard width, the mouse gains 1cm of additional range of motion. The advantage of the 65% layout is purely physical—it delivers benefits immediately, without the need for any software-based adjustments.
II. FPS Gaming: Horizontal Width as the Determinant of Spatial Efficiency
In FPS games, keyboard usage is highly concentrated. Players primarily rely on the WASD cluster and its immediate surroundings—Q, E, R, F, Shift, Ctrl, and the Spacebar—all of which are located on the left side of the main key area. The function (F) row, the number pad, and the navigation/editing cluster are almost never touched during gameplay.
The 65% layout offers the highest spatial efficiency. By eliminating the function row and the number pad, it achieves the narrowest possible footprint, thereby maximizing the horizontal space available for the mouse. The trade-off is that arrow keys must be accessed via an `Fn` key combination; some 65% layouts even condense the arrow keys into a tighter configuration. For purely competitive gaming, this is an acceptable compromise—FPS players use arrow keys far less frequently than office users do.
The 75% layout offers the next best level of space efficiency. It retains a full row of function (F) keys, making it only about 2–3 cm wider than a 65% layout. While players who use low sensitivity settings might notice this extra 2–3 cm, it generally remains within an acceptable range. The advantage of the 75% layout is that when switching from gaming to office work or daily tasks, the function keys are readily available without needing `Fn` combinations, making the transition much smoother.
The 98% layout has the lowest space efficiency. Its width is close to that of a TKL (tenkeyless) keyboard, and the inclusion of a numeric keypad takes up a significant amount of desk space on the right side. For players who use low sensitivity and require wide, sweeping mouse movements, a 98% layout noticeably restricts the available space on the mousepad. Even though it is narrower than a standard 104-key full-size keyboard, it remains the least space-efficient option for FPS gaming.
III. Office Use: Dedicated Keys Determine Operational Efficiency
The requirements for office work are almost the opposite of those for FPS gaming. Tasks such as typing, data entry, and using keyboard shortcuts are central, and these rely heavily on the physical presence of dedicated keys.
The 98% layout offers the highest space efficiency for office tasks. It retains a full numeric keypad and essential editing keys, allowing for operations like Excel data entry, financial calculations, or navigating to the beginning/end of a line of code (using `Home`/`End`) without needing `Fn` key combinations. The speed and accuracy provided by a physical numeric keypad cannot be matched by the number row above the main letter keys. While the 98% layout preserves these functions, it is narrower than a 104-key full-size keyboard, leaving more room for the mouse.
The 75% layout serves as a middle-ground choice for office use. It retains the full row of function keys, allowing for the direct use of common shortcuts such as `F2` for renaming, `F5` for refreshing, or `Alt+F4` for closing windows. However, the absence of a dedicated numeric keypad means that entering large amounts of numerical data must be done using the top row of number keys, which is less efficient than using a standalone keypad. Editing keys (Insert, Delete, Home, End) are typically accessed via Fn-key combinations or arranged in a compact layout; furthermore, on some 75% layouts, the right Shift key is shortened, which can negatively affect the typing experience.
The 65% layout carries the highest operational cost in an office environment. It lacks both a function (F-key) row and a numeric keypad, and even the arrow keys require the use of Fn-key combinations. For users unaccustomed to such combinations, routine tasks like text editing or working with spreadsheets are frequently interrupted. Office productivity on a 65% layout is highly dependent on the user’s muscle memory for the Fn layer—while these combinations can be quite efficient once mastered, the learning curve is the steepest among the three layouts.
IV. Another Perspective on Spatial Efficiency: Desk Depth and Modularity
Beyond horizontal width, these three layouts also differ in how much desk depth they occupy. 65% and 75% layouts are generally shallower, leaving more room behind the keyboard for monitor stands or cables, whereas 98% layouts are similar to TKL (tenkeyless) keyboards in terms of depth, requiring more desk space.
Recent design trends have also influenced the spatial efficiency of these layouts. For instance, some 98% keyboards achieve a narrower footprint by condensing the editing keys into a compact column and removing the indicator light section. Meanwhile, some 75% keyboards incorporate features like knobs or small screens into the top-right corner, adding functionality without increasing the keyboard’s width. These design shifts have blurred the lines between layouts; two keyboards, both classified as «75%,» may actually differ in width by 1–2 cm.
