How to aim in pool: ghost ball, contact points and fractions
There are three aiming methods in common use. All three describe the same geometry, and none of them is a system you can follow mechanically to a pot — they are ways of turning a picture in your head into a line you can commit to.
Understanding the geometry matters mostly because it tells you why you missed, which is the part that lets you fix it.
The geometry, once
To pot a ball, the object ball must leave along the line from its centre to the pocket. That means the cue ball has to strike it at the point on its surface directly opposite that line.
The cue ball's centre, at the moment of contact, sits one ball's width back along that line. That imaginary position is the ghost ball, and every aiming method is a different way of finding it.
Method 1 — Ghost ball
Picture a ball sitting where the cue ball must be at contact, and aim your cue ball's centre at that phantom's centre.
Strengths: intuitive, and it matches the actual physics exactly.
Weakness: you are aiming at empty space, and people are poor at visualising an object that is not there. It also gets harder as the cut angle increases, precisely when accuracy matters most.
Method 2 — Contact point
Identify the exact point on the object ball that must be struck, then aim to send the cue ball's edge through it.
Strengths: you are looking at a real point on a real ball rather than a phantom.
Weakness: the contact point is on the far side of a sphere and rotates out of view as the cut angle grows. On a thin cut you are aiming at a point you cannot actually see.
Method 3 — Fractional aiming
Reduce the shot to a small set of overlaps: full ball, three-quarter, half, quarter, thin. Learn what each looks like and which cut angle each produces.
Strengths: quick, repeatable, and it turns an infinite problem into five reference pictures you can genuinely memorise. A half-ball contact produces roughly a thirty-degree cut, which is worth knowing by heart.
Weakness: real shots land between the fractions, so you are always interpolating.
The thing that spoils all three
Aiming correctly and then delivering the cue somewhere else is by far the most common cause of missed pots. If your cue is not travelling along the line you chose, no aiming system will save you.
Before blaming your aim, test your delivery: place the cue ball a foot from a cushion, play it straight into the cushion, and see whether it comes straight back to the tip. If it returns off to one side, that is a delivery problem and it is worth fixing before anything else.
Two adjustments people forget
- Throw. Friction between the balls drags the object ball slightly off the pure geometric line, particularly on slow, cut shots with side spin. It is small but real on thin cuts.
- Deflection. Striking away from centre pushes the cue ball off your aiming line before it even reaches the object ball. The more side you apply, the more you must allow for it.
Common questions
- Which aiming method is best?
- Whichever you can repeat under pressure. Fractional aiming suits most players because it is fast and memorable, but a ghost-ball player who has practised it for years will out-pot a fractional player who has not.
- Should I aim with my dominant eye?
- Your head position should put your vision centre over the cue, which for most players is not the same as centring either eye. Find it by potting a straight shot repeatedly while shifting your head slightly, and keep the position that makes the pot easiest.
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