Use this interpolator to estimate values between ordered samples when the chosen curve model is defensible over the local interval.

Corner values

Corner values as [[y0x0, y0x1], [y1x0, y1x1]].

X0

X coordinate of the first grid column.

X1

X coordinate of the second grid column.

Y0

Y coordinate of the first grid row.

Y1

Y coordinate of the second grid row.

Point X

Query x coordinate.

Point Y

Query y coordinate.

Interpolate a value inside a unit of a 2x2 grid from its four corner values. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Value

Interpolated value at the query point.

• Interpolation does not validate the samples or justify extrapolation. Sorting, duplicate coordinates, spacing, endpoint derivatives, monotonicity, overshoot, noise, and domain physics determine whether the estimate is meaningful.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Plot the data and interpolant, compare methods, test known points exactly, and avoid extrapolating beyond the measured range without a model.

• Cubic Hermite Interpolation Calculator

  Interpolate between two values with specified tangents using cubic Hermite basis functions.

• Linear Interpolation Calculator

  Interpolate between two values using a finite parameter.

• Exponential Interpolation Calculator

  Interpolate between two points along an exponential curve of constant ratio.