diff --git a/tools/meas.py b/tools/meas.py
index 57eb0fe..7172576 100644
--- a/tools/meas.py
+++ b/tools/meas.py
@@ -503,7 +503,7 @@ if __name__ == "__main__":
                 meas_ratio.append(1)
 
               # R = meas_data[0] * 5V / 1023 * I
-              r = (m[1] * 5 / 1023) * i
+              r = (m[1] * 5 / 1023) / i
               meas_r.append(r)
 
               # P = meas_data[0] * 5V ^ 2 / r
@@ -520,6 +520,7 @@ if __name__ == "__main__":
             plt.plot(meas_freq, meas_r)
             plt.plot(meas_freq, meas_p)
 
+            print meas_ratio
             print "Please close the mathplot window to exit..."
             plt.show()