PDGA Round Rating Estimator
Estimate what a round would rate. Use the course's scratch scoring average, or derive the value from two players whose ratings you know.
A round that exactly matches the layout's scratch scoring average (SSA) rates 1000. Each throw above or below SSA moves the rating by the points-per-throw value, which depends on how hard the layout plays.
Enter two players from the same round whose round ratings you already know (e.g. from the PDGA event page). We solve for the points-per-throw, then rate your score on the same line.
How accurate is this? The PDGA does not publish an exact formula — official ratings are calculated per event from the scores of "propagators" (players rated 800+ with an established rating). The Known propagators mode reproduces that math and is the more accurate of the two. The Course SSA mode uses a transparent approximation of the points-per-throw curve (about 10 points per throw on a typical layout, more on short/easy courses, fewer on long/hard ones) and is meant as a ballpark only. You can edit the points-per-throw value directly if you know it.