Race Time Predictor

Recent race length (you can use a decimal point, eg. 26.2):
 
My time (hh:mm:ss):
: :
 
Please estimate my time for:
 
 
Predicted time (hh:mm:ss):
: :
 

How does this get your predicted time? The formula used for this calculator was devised by Pete Riegel in the late 70s. It has withstood the test of time as a formula as accurate as any out there for running.