diff --git a/Cantera/src/ArrayViewer.h b/Cantera/src/ArrayViewer.h
index d1cb8647d..160a7c94a 100755
--- a/Cantera/src/ArrayViewer.h
+++ b/Cantera/src/ArrayViewer.h
@@ -112,8 +112,8 @@ namespace Cantera {
 
     /// output the array
     inline ostream& operator<<(ostream& s, const ArrayViewer& m) {
-        int nr = m.nRows();
-        int nc = m.nColumns();
+        int nr = static_cast<int>(m.nRows());
+        int nc = static_cast<int>(m.nColumns());
         int i,j;
         for (i = 0; i < nr; i++) {
             for (j = 0; j < nc; j++) {
diff --git a/Cantera/src/GasKinetics.cpp b/Cantera/src/GasKinetics.cpp
index d3a397b52..7da4f359b 100755
--- a/Cantera/src/GasKinetics.cpp
+++ b/Cantera/src/GasKinetics.cpp
@@ -611,9 +611,12 @@ namespace Cantera {
     void GasKinetics::finalize() {
         if (!m_finalized) {
             int i, j, nr, np;
-            m_kdata->falloff_work.resize(m_falloffn.workSize());
-            m_kdata->concm_3b_values.resize(m_3b_concm.workSize());
-            m_kdata->concm_falloff_values.resize(m_falloff_concm.workSize());
+            m_kdata->falloff_work.resize(
+				static_cast<ctvector_fp::size_t>(m_falloffn.workSize()));
+            m_kdata->concm_3b_values.resize(
+				static_cast<ctvector_fp::size_t>(m_3b_concm.workSize()));
+            m_kdata->concm_falloff_values.resize(
+				static_cast<ctvector_fp::size_t>(m_falloff_concm.workSize()));
 
             for (i = 0; i < m_ii; i++) {
                 nr = m_reactants[i].size();
diff --git a/Cantera/src/Kinetics.h b/Cantera/src/Kinetics.h
index d7c229cdf..fc6f91910 100755
--- a/Cantera/src/Kinetics.h
+++ b/Cantera/src/Kinetics.h
@@ -84,9 +84,9 @@ namespace Cantera {
 
         /**
          * The number of phases defined within the kinetics
-	 * object.
+	     * object.
          */  
-        int nPhases() const { return m_thermo.size(); }	
+        int nPhases() const { return static_cast<int>(m_thermo.size()); }	
 
 	/**
 	 * Return the phase index of a phase in the list of phases
@@ -215,7 +215,7 @@ namespace Cantera {
 	 *   - If no match is found in any phase, the value -2 is returned.
 	 */
         int kineticsSpeciesIndex(string nm, string ph = "<any>") const {
-	  int np = m_thermo.size();
+	  int np = static_cast<int>(m_thermo.size());
 	  int k;
 	  string id;
 	  for (int n = 0; n < np; n++) {
@@ -244,7 +244,7 @@ namespace Cantera {
 	 * Will throw an error if the species string doesn't match.
 	 */
         thermo_t& speciesPhase(string nm) {
-            int np = m_thermo.size();
+            int np = static_cast<int>(m_thermo.size());
             int k;
             string id;
             for (int n = 0; n < np; n++) {
diff --git a/Cantera/src/RateCoeffMgr.h b/Cantera/src/RateCoeffMgr.h
index a48ac9b7d..cccfbc561 100755
--- a/Cantera/src/RateCoeffMgr.h
+++ b/Cantera/src/RateCoeffMgr.h
@@ -61,7 +61,7 @@ namespace Cantera {
                 if (c[i] != 0.0 || R::alwaysComputeRate() ) {
                     m_rxn.push_back(rxnNumber);
                     m_rates.push_back(R(m, c));
-                    return m_rates.size() - 1;
+                    return static_cast<int>(m_rates.size()) - 1;
                 }
             }
             return -1;
diff --git a/Cantera/src/ShomateThermo.h b/Cantera/src/ShomateThermo.h
index fa438de9a..421cde944 100755
--- a/Cantera/src/ShomateThermo.h
+++ b/Cantera/src/ShomateThermo.h
@@ -63,7 +63,7 @@ namespace Cantera {
                 m_high.push_back(v);
                 m_low.push_back(v);
                 m_tmid.push_back(c[0]);
-                m_index[imid] = igrp = m_high.size();
+                m_index[imid] = igrp = static_cast<int>(m_high.size());
                 m_ngroups++;
             }
             doublereal tlow  = minTemp;
diff --git a/Cantera/src/StoichManager.h b/Cantera/src/StoichManager.h
index 3d12368a6..932d180f8 100755
--- a/Cantera/src/StoichManager.h
+++ b/Cantera/src/StoichManager.h
@@ -466,20 +466,20 @@ namespace Cantera {
       m_n[rxn] = k.size();
       switch (k.size()) {
       case 1:
-	m_loc[rxn] = m_c1_list.size();
+	m_loc[rxn] = static_cast<int>(m_c1_list.size());
 	m_c1_list.push_back(C1(rxn, k[0], order[0])); 
 	break; 
       case 2:
-	m_loc[rxn] = m_c2_list.size();  
+	m_loc[rxn] = static_cast<int>(m_c2_list.size());  
 	m_c2_list.push_back(C2(rxn, k[0], k[1], order[0], order[1])); 
 	break; 
       case 3:
-	m_loc[rxn] = m_c3_list.size();  
+	m_loc[rxn] = static_cast<int>(m_c3_list.size());  
 	m_c3_list.push_back(C3(rxn, k[0], k[1], k[2], 
 			       order[0], order[1], order[2])); 
 	break; 
       default:
-	m_loc[rxn] = m_cn_list.size(); 
+	m_loc[rxn] = static_cast<int>(m_cn_list.size()); 
 	m_cn_list.push_back(C_AnyN(rxn, k, order));
       }
     }
diff --git a/Cantera/src/ThirdBodyMgr.h b/Cantera/src/ThirdBodyMgr.h
index 59748f9a6..f4e5b8a0e 100755
--- a/Cantera/src/ThirdBodyMgr.h
+++ b/Cantera/src/ThirdBodyMgr.h
@@ -32,7 +32,8 @@ namespace Cantera {
             doublereal dflt=1.0) {
             m_n++;
             m_reaction_index.push_back( rxnNumber );
-            m_concm.push_back( _E( enhanced.size(), enhanced, dflt ) );
+            m_concm.push_back( _E(static_cast<int>(enhanced.size()),
+			                      enhanced, dflt ) );
         }
         
         void update(const vector_fp& conc, doublereal ctot, workPtr work) {