Distances are calculated on the elapsed time between each horse and then a scale known as the Lengths per Second Scale (Lps) is used dependent upon whether it is Flat or Jumps racing, the type of surface in use at the all-weather fixtures and the official going description issued on the day. The Scales used vary from four to five Lps for Jumps racing and from five to six Lps on the Flat. When the going description distinguishes between different parts of the course, the scale relating to the going in the straight is applied.  The table for the Lengths per Second Scale (Lps) can be viewed here. For more details view our Guide to Handicapping.