How many holes are in a standard PGA Tour round? A standard round has 18 holes.
That format comes from the Old Course at St Andrews, where an 18-hole round was established in 1764. Before that, golfers often played a smaller number of holes, sometimes completing the same holes twice. The 18-hole structure gradually became the norm and is now used for most full rounds in professional golf.
On a typical course, the opening nine holes are called the front nine and the closing nine the back nine. PGA Tour stroke-play events generally cover 72 holes over four rounds, unless weather, withdrawals, or a shortened tournament changes the format. The total par for an 18-hole course is commonly 70, 71, or 72.
The main mix-up is confusing holes with strokes: 18 is the number of holes, not the number of shots. Nine-hole courses are also legitimate, but players normally play them twice to complete an 18-hole round.