What does RPR mean in horse racing

RPR stands for Racing Post Rating and it is the Racing Posts rating for the horse adjusted for today's weights.

So in theory in the opinion of the Racing Posts private handicapper the horse with the highest RPR should win the race.

In practice that is not the case because no rating is 100% accurate and many horses in a race could have the same or similar RPR ratings.

You can see the RPR for each horse listed on the free Racing Post race-cards