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# Bilinear Interpolation Calculator

Bilinear interpolation performs the linear interpolation first in one direction and then in the other direction. It interpolates the functions of the two variables X and Y over a rectilinear 2D grid. Use our online bilinear interpolation calculator to calculate the double interpolation. Enter the values of X1, X2, Y1 and Y2, coordination value of X and Y, the position of Q11, Q12, Q21, and Q22 in this Double Interpolation Calculator, the tool will update you the result.

## Double Interpolation Calculator

Bilinear interpolation performs the linear interpolation first in one direction and then in the other direction. It interpolates the functions of the two variables X and Y over a rectilinear 2D grid. Use our online bilinear interpolation calculator to calculate the double interpolation. Enter the values of X1, X2, Y1 and Y2, coordination value of X and Y, the position of Q11, Q12, Q21, and Q22 in this Double Interpolation Calculator, the tool will update you the result.

Code to add this calci to your website

#### Formula:

p = [[(b - e) x (d - f) / (b - a) (d - c)] x p1] + [[(e - a) x (d - f) / (b - a) (d - c)]x p3] + [[(b - e) x (f - c) / (b - a) (d - c)] x p2] + [[(e - a) x (f - c) / (b - a) (d - c)] x p4] Where, p = The Interpolated Value a = Value of X1 b = Value of X2 c = Value of Y1 d = Value of Y2 e = Coordination Value of x f = Coordination Value of y p1 = Position of Q11 p2 = Position of Q12 p3 = Position of Q21 p4 = Position of Q22

The above bilinear interpolation calculator performs double interpolation operation which is just the extension of linear interpolation. This tool is capable of producing reliable results consistently.