diff --git a/plugins/processors/converter/converter.go b/plugins/processors/converter/converter.go
index 3c9b74f3f..db240abf4 100644
--- a/plugins/processors/converter/converter.go
+++ b/plugins/processors/converter/converter.go
@@ -345,11 +345,16 @@ func toInteger(v interface{}) (int64, bool) {
 			return 0, true
 		}
 	case string:
-		result, err := strconv.ParseFloat(value, 64)
+		result, err := strconv.ParseInt(value, 0, 64)
+
 		if err != nil {
-			return 0, false
+			result, err := strconv.ParseFloat(value, 64)
+			if err != nil {
+				return 0, false
+			}
+			return toInteger(result)
 		}
-		return toInteger(result)
+		return result, true
 	}
 	return 0, false
 }
@@ -379,11 +384,16 @@ func toUnsigned(v interface{}) (uint64, bool) {
 			return 0, true
 		}
 	case string:
-		result, err := strconv.ParseFloat(value, 64)
+		result, err := strconv.ParseUint(value, 0, 64)
+
 		if err != nil {
-			return 0, false
+			result, err := strconv.ParseFloat(value, 64)
+			if err != nil {
+				return 0, false
+			}
+			return toUnsigned(result)
 		}
-		return toUnsigned(result)
+		return result, true
 	}
 	return 0, false
 }
diff --git a/plugins/processors/converter/converter_test.go b/plugins/processors/converter/converter_test.go
index 1b00cedf9..1d60a40fb 100644
--- a/plugins/processors/converter/converter_test.go
+++ b/plugins/processors/converter/converter_test.go
@@ -129,8 +129,8 @@ func TestConverter(t *testing.T) {
 			converter: &Converter{
 				Fields: &Conversion{
 					String:   []string{"a"},
-					Integer:  []string{"b", "b1", "b2"},
-					Unsigned: []string{"c", "c1", "c2"},
+					Integer:  []string{"b", "b1", "b2", "b3"},
+					Unsigned: []string{"c", "c1", "c2", "c3"},
 					Boolean:  []string{"d"},
 					Float:    []string{"e"},
 					Tag:      []string{"f"},
@@ -145,9 +145,11 @@ func TestConverter(t *testing.T) {
 						"b":  "42",
 						"b1": "42.2",
 						"b2": "42.5",
+						"b3": "0x2A",
 						"c":  "42",
 						"c1": "42.2",
 						"c2": "42.5",
+						"c3": "0x2A",
 						"d":  "true",
 						"e":  "42.0",
 						"f":  "foo",
@@ -166,9 +168,11 @@ func TestConverter(t *testing.T) {
 						"b":  int64(42),
 						"b1": int64(42),
 						"b2": int64(43),
+						"b3": int64(42),
 						"c":  uint64(42),
 						"c1": uint64(42),
 						"c2": uint64(43),
+						"c3": uint64(42),
 						"d":  true,
 						"e":  42.0,
 					},