Main weapon data

Definitions

 * Range: How far ink travels before reduced damage occurs.
 * Damage: The damage value dealt by one attack.
 * Fire rate: The number of frames between each bullet, attack, or full charge (FC).
 * Time to splat: The amount of time, given here in seconds, that it takes for a weapon to splat an enemy in ideal conditions.
 * Ink usage: The percentage of the ink tank consumed with every bullet, attack, or full charge.
 * Mobility: Movement speed while attacking or rolling or holding a charge. Measured in DU per frame. DU refers to the game's internal distance unit. There are 60 frames every second in Splatoon.
 * Paint rate: A rating of how fast a weapon covers the ground with ink. Measured in points per second. Values are averaged from 10 trials.

Measuring weapon range
Each main weapon has two different shooting ranges - the hitbox range, of where the weapon can deal damage to a target, and the slightly larger inking range, which determines how far a weapon can ink surfaces.

A major problem in properly measuring a weapon's range is how there are no real units of measurement in the game. It may be possible to know the relative distance a weapon can shoot, but not the absolute distance. To determine this, a consistent unit of distance that is built into the game is needed, such as evenly spaced lines, while the starting point of measurement must always be the same. In an open space with no walls and obstacles, it is almost impossible to always shoot from the same spot in the same direction and angle to the ground.

The solution to this is the Shooting Range. On the ground are white, evenly spaced lines that act as an absolute unit of measurement. If the ink on the stage is reset, the player is always teleported to the same spot. By turning off motion controls, the angle the weapon shoots at will also remain the same, even after resetting. With this, there is a consistent way to measure the shooting distance of each weapon. For weapons with a range longer than the distance to the back wall, it is possible to back up to the far wall to gain a few extra lines of distance.

Splatoon
Range is measured in Shooting Range marks. This range data comes from the red line on the range chart.

Splatoon 2
The range data here is measured in the game's internal distance unit (DU), with the number of testing area lines in parenthesis. Note that the testing area lines range value is simply the DU range value divided by 50 and rounded down.

Weapon range
''Note: that the range was rounded to one decimal place. Because of this, many weapons will share the same with rank with other weapons.''

Splatoon 3
There are currently (Patch 2.1.0) seven new weapon additions to the game.

The range data was not tested and is using the in-game measurements (check here), instead of the table's above version of the unit measurements (DU). The "Fire rate" attribute might not be the correct value for the following weapons: "Big Swig Roller", "REEF-LUX 450", "Snipewriter 5H", "Splatana Stamper", "Splatana Wiper", "Tri-Stringer". Note that the "Range (in-game)" attribute here is for instance:

Big Swig Roller: 56/100 in-game "units" ("Range" for reference)