diff --git a/simpegMT/Utils/dataUtils.py b/simpegMT/Utils/dataUtils.py
new file mode 100644
index 00000000..709de033
--- /dev/null
+++ b/simpegMT/Utils/dataUtils.py
@@ -0,0 +1,21 @@
+# Utils used for the data,
+import numpy as np
+def getAppRes(MTdata):
+    # Make impedance
+    zList = []
+    for src in MTdata.survey.srcList:
+        zc = [src.freq]
+        for rx in src.rxList:
+            if 'i' in rx.rxType:
+                m=1j
+            else:
+                m = 1
+            zc.append(m*MTdata[src,rx])
+        zList.append(zc)
+    return [appResPhs(zList[i][0],np.sum(zList[i][1:3])) for i in np.arange(len(zList))]
+
+
+def appResPhs(freq,z):
+    app_res = ((1./(8e-7*np.pi**2))/freq)*np.abs(z)**2
+    app_phs = np.arctan2(-z.imag,z.real)*(180/np.pi)
+    return app_res, app_phs
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