On Wed, 23 Aug 2006 09:37:50 -0700, "Peter Duniho"
wrote in
:

There are no calculators to provide the information that the Koch chart
provides.

Although not what you were talking about, there is this:

http://www.mountainflying.com/apr_denalt.htm
The APR DENALT (DENsity ALTitude) Performance Computer
To solve the takeoff distance and rate of climb at any particular
density altitude, dial in the outside air temperature (degrees
Fahrenheit) and read the "takeoff factor" and "rate-of-climb
factor" to apply to the normal sea level values obtained from the
Pilot's Operating Handbook.