Example:
Length = 18"
Width = .25"
Thickness = .125"
Weight = 1 gram
Load = 200 grams
Results:
Stiffness Coefficient = 104.61
Density = 6.76
Elastic Modulus = 24824807
Elastic Modulus(psi) = 353886

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Basic Formulas used:

Elastic modulus (gr per square cm) = .188*length^2*(buckleload-woodweight)/(width*thickness^3)
Density = 3.8*woodweight/(length*width*thickness)
Stiffness Coefficient = (elasticmodulus*2500)/(density*density*13000000)