My table correction · optional
Default 0. Enter only a correction you established with repeatable reference shots; this is not a measured table profile.
All three sizes use the same 2:1 numbering. Size alone adds no correction.
The solid line connects departure to the first aiming reference. T marks the requested third-rail reference, not an object ball or a predicted collision. Intermediate rebounds are deliberately not invented.
What this calculator gives you
The traditional Corner-5 numbering uses T = D − F, so F = D − T. For D = 5 and T = 2, F = 3. The result is a system reference, not a guarantee of a carom. A departure number describes an aiming line projected onto the rail scale; it is not an arbitrary coordinate of a ball.
Read the scales, not just the subtraction
D is 5 at the reference corner; it increases along the short rail and decreases by half a unit per diamond along the long rail. F is the first-rail scale, T the third-rail arrival reference. The selected D, F and T also appear as readable text outside the diagram. The familiar 50 − 20 = 30 example uses ten times these units.
A practical reference-shot routine
Start with one published numbering convention and a repeatable, moderate stroke with running side spin. Distinguish aiming through a diamond from the actual cushion-nose contact: these are not automatically the same point. Repeat a reference shot, note the arrival scatter, then change one input at a time. Only use the optional correction when the measured shift is repeatable.
What the drawing does not measure
This page does not solve spin, speed, cloth, cushion condition or ball collisions. It does not run Physics V3. A different table length does not justify a universal extra quarter- or half-diamond. The table-specific correction stays your explicit input. A supported number does not prove the route is playable from every ball position.
Corner-5 formula and numbering · David Alciatore, TP 7.2 (PDF)
The source explains the numbering and aiming convention with pool examples. It is not a calibration dataset for a heated carom table.