Please modify any of the formboxes and click on the calculate final velocity button. Simpler analysis is available at spacecraft in vacuum, atmospheric spacecraft and multi stage spacecraft. This is version 2001.8 and a zipped download is available.

Here's a link with the current parameters:

This script is under the GPL license which basically welcomes you to copy or modify this and allows anyone else to copy or modify your version if you make it public.
 
 

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Spacecraft Cost Analysis
Labor
Labor Rate ( $ / hr )
Labor Scale Factor
Launch Multiplier
Ten Ton Craft Work ( hrs )
Structure Price
Structure Exhaust Scale
Structure Mass Scale
Ten Ton Structure Price ( $ )
Fuel Price
Exhaust Velocity Scale
Propellent Price ( $ / kg )
Launch
Latitude ( Degrees )
Location Labor Multiplier
Starting Altitude ( m )
Starting Velocity ( m / s )
First Stage
Empty Mass Ratio
Reusability
Structure Price Multiplier
Exhaust Velocity ( m / s )
Liftoff Acceleration ( m / s^2 )
Mass ( kg )
Diameter ( m )
Payload Ratio
Second Stage
Is Second Stage Wanted?
Empty Mass Ratio
Reusability
Structure Price Multiplier
Exhaust Velocity ( m / s )
Liftoff Acceleration ( m / s^2 )
Payload Ratio
Third Stage
Is Third Stage Wanted?
Empty Mass Ratio
Reusability
Structure Price Multiplier
Exhaust Velocity ( m / s )
Liftoff Acceleration ( m / s^2 )
Payload Ratio
Environment
Gravity ( m / s^2 )
Molecular Weight
Pressure ( N / m^2 )
Radius ( m )
Rotation Period ( s )
Temperature ( K )
Fast Screen Refresh
Recalculate On Change