Bowling Pin Numbers and Setup (Diagram)

Last updated October 7, 2026 · BowlingCalc

Bowling pins are numbered from the front of the rack toward the back. The single pin nearest you is number one; the back corners are seven on your left and ten on your right.

Read the triangle from your position

Stand behind the foul line and imagine looking directly down the lane. The first row contains pin 1. Behind it are pins 2 and 3, from left to right. The third row contains 4, 5 and 6. The back row contains 7, 8, 9 and 10. Keep that viewpoint when describing a leave to another bowler.

The pin numbers do not change because a player is left-handed. Neither do they change when you look back at the rack from behind the pinsetter. A diagram drawn from the machinery end would reverse the picture, which is why a clear bowler’s-view label is useful.

Adjacent pin centers are twelve inches apart in the standard layout. That is a center-to-center measurement, not a twelve-inch gap between the outside surfaces. The equal spacing creates the familiar equilateral-triangle arrangement.

The headpin and the pocket

Pin 1 is called the headpin. For a right-handed delivery, the conventional pocket is the area between pins 1 and 3. For a left-handed delivery, it is between pins 1 and 2. The term describes an entry area into the rack, not an extra pin or a target painted on the lane.

A ball entering the pocket does not guarantee a strike. The way it arrives and the resulting pin action matter. For learning the numbering system, simply identify the two pins that define your side’s pocket. Avoid changing the numbers to match the direction your ball curves.

Name the leave precisely

A leave is the set of pins still standing after a delivery. If only the back-right corner remains, call it the ten pin. If pins 2, 4 and 5 remain, write 2-4-5. Listing the pin numbers is clearer than saying “the ones on the left,” especially when reviewing a game later.

The bowling score calculator records pinfall counts rather than individual pin locations. To study spare patterns, save the game link and write the leave beside it in your own notes. Eight pins down could leave many different two-pin combinations; the score alone cannot tell you which one occurred.

Three common splits

A split is a particular separated leave after the first delivery with the headpin down, as defined by the rules. Not every group of separated pins is called a split. A washout, for example, retains the headpin. These diagrams highlight three familiar split arrangements.

The 7-10 leaves the two back corners. The 4-6 leaves the outer pins of the third row. The Big Four combines those two pairs. Recognizing the names makes lane conversation easier, but record the actual numbers if you want an unambiguous practice history.

Practice the numbers away from the lane

Draw four dots on the back row, three on the next, two on the next and one at the front. Start with 1 at the front and count left to right through each row. Then cover a few dots and name what remains. Repeating the same orientation helps you learn the pattern without memorizing ten unrelated positions.

For paper scoring, use the printable score sheet and keep leave notes in the margin. You still record only the pinfall or mark in the scoring boxes. A split does not carry a points penalty: if you convert it on the second delivery, the frame is a spare just like any other spare.

Our bowling terms glossary explains pocket, washout, sleeper and other words related to pin positions. Learning those terms alongside the diagram makes both coaching instructions and your own notes easier to understand.

Layout reference: USBC equipment specifications. Split scoring and definitions follow the USBC Playing Rules. Diagrams are schematic and are not scale plans for installation.