Billiards Bank Shot Calculator for Rail Angles
🎱 Billiards Bank Shot Calculator
Map cushion contacts, rail angles, and rebound paths before you shoot.
Use this calculator to compare the cue line, object-ball line, and mirrored rail path so you can see how clean the bank really is.
📌 Presets
⚙ Shot Inputs
Switch all distances, table sizes, and coordinates together.
Preset dimensions can still be edited after selection.
Long axis from left rail to right rail.
Short axis from top rail to bottom rail.
The calculator uses reflection paths for each rail.
First cushion the object ball is meant to meet.
Used when the route asks for a second rail.
Used when the route asks for a third rail.
The pocket center is used as the final mirror target.
Measured from the left rail to the cue ball center.
Measured from the top rail to the cue ball center.
The ball you are banking to the cushion.
Used with the mirrored pocket line.
Direction affects the rebound read at the rail.
A small value keeps the bank closer to pure geometry.
Speed changes cushion return and rail hold.
Use this to reflect table speed and rubber response.
Extra pocket window used when judging the bank line.
A simple weighting for the final confidence score.
Primary contact
--
First rail point
Rail sequence pending
Aim cut
--
Cue-to-object and object-to-rail
Angle read pending
Route length
--
Total cue path
Contact to pocket included
Bank fit
--
Geometry score
Readiness and tolerance
📐 Calculation Breakdown
| Item | Input | Result | Note |
|---|
📊 Component and Spec Grid
--
Table length
Updated from the table preset
--
Table width
Supports the rail contact read
--
Diamond spacing
Helpful for line-to-rail checks
--
Pocket mouth
Pocket window from the preset
📑 Reference Tables
| Table format | Playing field | Pocket mouth | Bank note |
|---|---|---|---|
| 7-foot bar box | 78 x 39 in | 4.5 in | Tighter angles |
| 8-foot home | 92 x 46 in | 4.75 in | Balanced routes |
| 9-foot pro | 100 x 50 in | 5.0 in | Clean mirror line |
| 10-foot match | 112 x 56 in | 5.0 in | Long rail read |
| Snooker table | 144 x 72 in | 3.5 in | Very tight pocket |
| Carom table | 118 x 59 in | None | Rail control only |
| Bank band | Rail read | Spin need | Best use |
|---|---|---|---|
| 0-18 deg | Little bend | Low | Straight bank |
| 18-32 deg | Clean mirror | Medium | One-rail route |
| 32-48 deg | Open window | Light | Cross-bank |
| 48-65 deg | Tight line | Careful | Long rail |
| 65+ deg | Extreme bank | Precise | Advanced only |
| Cushion feel | Speed read | Spin effect | Adjustment |
|---|---|---|---|
| Dead cushion | Shorter return | More hold | Hit a touch fuller |
| Standard cloth | Neutral roll | Basic rebound | Keep the mirror line |
| Lively cushion | Longer return | More kick | Reduce pace a bit |
| Fast cloth | More skid | Less grab | Check the first rail |
| Slow cloth | More drag | More hold | Use a fuller hit |
| Rail mark | Spacing | Use | Common read |
|---|---|---|---|
| First diamond | 1 mark | Line check | Mirror start |
| Middle diamond | Half rail | Center target | Best anchor |
| End diamond | Full rail | Corner lane | Watch the jaw |
| Corner point | Rail nose | Contact zone | Use the nose |
| Side pocket mark | Mid rail | Side-bank lane | Keep it fuller |
💡 Practical Tips
Use the mirror pocket
Reflect the target pocket across the first rail before you judge the bank contact point.
Read the cushion nose
Measure to the rail nose, not the wood edge, so your contact line stays consistent.
Use this billiards bank shot calculator to map rail contacts, compare angles, and tune spin and speed so your bank route reads cleaner before you shoot.
A bank shot is when a ball is hit into a pocket by bouncing the ball off the side rail of the pool table. To execute a bank shot, an understanding of the geometry involve in banking a pool ball are required. In banking a ball, the angle at which the ball hits the rail of the pool table is the same then the angle at which the ball will exit the rail.
This is referred to as a principle of reflection. Furthermore, the geometry involved in banking a ball allow the player to aim the ball at the “mirror” image of the pocket behind the rail. The size of the pool table impact how bank shots are performed.
How to Make a Bank Shot
Smaller pool tables, such as 7-foot tables, have tighter pocket placement and, therefore, are less forgiving if the bank shot isnt performed precise. For larger pool tables, such as 9-foot tables, the pocket are more generous in size but the balls must be hit with more precision due to the longer length of the rails of the pool tables. The speed at which the player hits the object ball will also impact bank shots.
If the ball is hit with a fast pace, the ball will exit the rail quick. Conversely, if the ball is hit with a soft roll, the ball will interact with the rail for a longer period of time. Spin, or “English” as it is also referred to in pool, can be used to adjust the path that the object ball take during a bank shot.
If the player hits the object ball with a side spin, the ball will either take a path towards the rail or move away from the rail depending on the direction of the spin applied to the ball. Furthermore, the point of contact between the ball and the rail should be the nose of the rail rather than the flat face of the rail, or else the ball may take an unpredictable path. The condition of the pool table can also impact bank shots.
Some pool table have cushions that are considered “dead” in that they absorb some of the energy of the bouncing ball. Other cushions may be “lively” in that they return the ball with more of its energy. Finally, the type of cloth on the table will also impact bank shots; a slow cloth will allow the ball to maintain its spin longer while a fast synthetic cloth will cause the ball to skid away from it’s designated path after banking off the rail.
The diamonds that are located along the rail of a professional pool table can assist in calculating bank shot. Each diamond represent certain target for the balls to aim for during bank shots. Furthermore, for bank shots that target the corners of the pocket, players should aim for the nose jaw of the pocket.
For bank shots that target the side pockets, however, players must use a “fuller” path for the ball to follow so that the ball does not rattle against the pocket. To improve bank shots, players can use the “mirror method” to bank balls. Players can practice this method by removing the cue stick from the game while aiming for where the ball is to bounce off the rail.
Furthermore, the practice can also include using different speed for the object ball and applying spin to the ball to understand how each of these factor impact bank shots. By focusing on the point of contact between the ball and the rail, the cut angle of the ball, and the path that the ball travels, players can master bank shots. Through practicing bank shots, players will gain an understanding of how bank shot work within the game of pool.
