Free Durbin-Watson Calculator

Detect autocorrelation in regression residuals.

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Durbin-Watson Statistic

0.900000

Approx Autocorrelation0.5500

Durbin-Watson Statistic vs Sum of (et - et-1) squared

View formula & how it works →

Durbin-Watson Test

DW = Sum(et - et-1)^2 / Sum(et^2)

DW near 2 = no autocorrelation. DW < 2 = positive, DW > 2 = negative.

Example Calculation

Sum diff sq=45, sum e sq=50.

  1. 01DW = 0.90
  2. 02Positive autocorrelation

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