With this online calculator you can calculate elasticity coefficient.
Formula:
k = (Y1-Y0)*X0/(X1-X0)/Y0
k - coefficient of elasticity
X0, X1 - argument value
Y0, Y1 - function value
Note:
If the coefficient is less than 1, then the function is inelastic.
If the coefficient is greater than 1, then the function is elastic.
The coefficient of elasticity is a measure of the sensitivity of one variable to a change in another.