How to calculate normal takeoff ground roll when the POH only has Short Field Takeoff tables? The Cessna 172S POH only has Short Field Takeoff Distance tables.  How do pilots determine ground roll for a normal takeoff on a long field with hard surface?

The examples in the POH only deal with short field takeoff.  Similar thing with chapter 10 in the Pilot's Handbook of Aeronautical Knowledge.  It's either short field takeoff or referring to charts that don't exist in the Cessna 172S POH.

Do pilots look up the short field ground roll, apply the adjustment factor for headwind and apply another adjustment factor?

The POH says, on page 5-4 "...keeping in mind that the distances shown are based on the short field takeoff technique.  Conservative distances can be established by reading the chart at the next higher value for weight, altitude and temperature."

Does that mean to use the chart, but use the row for the next highest PA and the column for the next next highest temp when determining normal takeoff ground roll?

I've searched this forum and haven't found anything applicable.
In the C172S POH I have, it's on p. ii (Performance - Specifications): 960ft ground roll and 1630ft total over a 50ft obstacle. The note on p. iii says:


  The above performance figures are based on airplane weights at 2550
  pounds, standard atmospheric conditions, level, hard-surfaced dry
  runways and no wind. They are calculated values derived from flight
  tests conducted by Cessna Aircraft Company under carefully documented
  conditions and will vary with individual airplanes and numerous
  factors affecting flight performance.


In other words, it's a useful number to know but you're unlikely to get exactly that performance unless you're a Cessna test pilot in a brand new aircraft. If you own the aircraft (or rent it often) you might want to spend some time actually measuring takeoff distances yourself, to see what performance you're really getting.