diff --git a/README.md b/README.md
index ec28bede..317bed5a 100644
--- a/README.md
+++ b/README.md
@@ -65,7 +65,7 @@ where
     D: serde::Deserializer<'de>,
 {
     let data_type = calamine::DataType::deserialize(deserializer)?;
-    if let Some(float) = data_type.as_f64() {
+    if let Some(float) = data_type.as_float() {
         Ok(Some(float))
     } else {
         Ok(None)
@@ -85,7 +85,6 @@ fn main() ->  Result<(), Box<dyn std::error::Error>> {
   }
 ```
 
-
 ### Reader: Simple
 
 ```rust
@@ -160,7 +159,7 @@ for s in sheets {
 
 ## Features
 
-- `dates`: Add date related fn to `DataType`. 
+- `dates`: Add date related fn to `DataType`.
 - `picture`: Extract picture data.
 
 ### Others
diff --git a/examples/excel_to_csv.rs b/examples/excel_to_csv.rs
index 8e6d6e85..62fa7f18 100644
--- a/examples/excel_to_csv.rs
+++ b/examples/excel_to_csv.rs
@@ -39,7 +39,7 @@ fn write_range<W: Write>(dest: &mut W, range: &Range<Data>) -> std::io::Result<(
                     write!(dest, "{}", s)
                 }
                 Data::Float(ref f) => write!(dest, "{}", f),
-                Data::DateTime(ref d) => write!(dest, "{}", d.as_f64()),
+                Data::DateTime(ref d) => write!(dest, "{}", d.as_float()),
                 Data::Int(ref i) => write!(dest, "{}", i),
                 Data::Error(ref e) => write!(dest, "{:?}", e),
                 Data::Bool(ref b) => write!(dest, "{}", b),
diff --git a/src/datatype.rs b/src/datatype.rs
index e7ac200c..29f2a09b 100644
--- a/src/datatype.rs
+++ b/src/datatype.rs
@@ -138,7 +138,7 @@ impl DataType for Data {
         }
     }
 
-    fn as_i64(&self) -> Option<i64> {
+    fn as_int(&self) -> Option<i64> {
         match self {
             Data::Int(v) => Some(*v),
             Data::Float(v) => Some(*v as i64),
@@ -147,7 +147,7 @@ impl DataType for Data {
         }
     }
 
-    fn as_f64(&self) -> Option<f64> {
+    fn as_float(&self) -> Option<f64> {
         match self {
             Data::Int(v) => Some(*v as f64),
             Data::Float(v) => Some(*v),
@@ -446,7 +446,7 @@ impl DataType for DataRef<'_> {
         }
     }
 
-    fn as_i64(&self) -> Option<i64> {
+    fn as_int(&self) -> Option<i64> {
         match self {
             DataRef::Int(v) => Some(*v),
             DataRef::Float(v) => Some(*v as i64),
@@ -456,7 +456,7 @@ impl DataType for DataRef<'_> {
         }
     }
 
-    fn as_f64(&self) -> Option<f64> {
+    fn as_float(&self) -> Option<f64> {
         match self {
             DataRef::Int(v) => Some(*v as f64),
             DataRef::Float(v) => Some(*v),
@@ -525,10 +525,10 @@ pub trait DataType {
     fn as_string(&self) -> Option<String>;
 
     /// Try converting data type into an int
-    fn as_i64(&self) -> Option<i64>;
+    fn as_int(&self) -> Option<i64>;
 
     /// Try converting data type into a float
-    fn as_f64(&self) -> Option<f64>;
+    fn as_float(&self) -> Option<f64>;
 
     /// Try converting data type into a date
     #[cfg(feature = "dates")]
@@ -590,7 +590,7 @@ pub trait DataType {
         use std::str::FromStr;
 
         if self.is_int() || self.is_float() {
-            self.as_f64()
+            self.as_float()
                 .map(|f| ExcelDateTime::from_value_only(f).as_datetime())
         } else if self.is_datetime() {
             self.get_datetime().map(|d| d.as_datetime())
@@ -671,7 +671,7 @@ impl ExcelDateTime {
     }
 
     /// Converting data type into a float
-    pub fn as_f64(&self) -> f64 {
+    pub fn as_float(&self) -> f64 {
         self.value
     }
 
diff --git a/src/de.rs b/src/de.rs
index 34c0c94d..4957c528 100644
--- a/src/de.rs
+++ b/src/de.rs
@@ -560,7 +560,7 @@ impl<'a, 'de> serde::Deserializer<'de> for DataDeserializer<'a> {
             Data::Bool(v) => visitor.visit_bool(*v),
             Data::Int(v) => visitor.visit_i64(*v),
             Data::Empty => visitor.visit_unit(),
-            Data::DateTime(v) => visitor.visit_f64(v.as_f64()),
+            Data::DateTime(v) => visitor.visit_f64(v.as_float()),
             Data::DateTimeIso(v) => visitor.visit_str(v),
             Data::DurationIso(v) => visitor.visit_str(v),
             Data::Error(ref err) => Err(DeError::CellError {
@@ -633,7 +633,7 @@ impl<'a, 'de> serde::Deserializer<'de> for DataDeserializer<'a> {
             Data::Empty => visitor.visit_bool(false),
             Data::Float(v) => visitor.visit_bool(*v != 0.),
             Data::Int(v) => visitor.visit_bool(*v != 0),
-            Data::DateTime(v) => visitor.visit_bool(v.as_f64() != 0.),
+            Data::DateTime(v) => visitor.visit_bool(v.as_float() != 0.),
             Data::DateTimeIso(_) => visitor.visit_bool(true),
             Data::DurationIso(_) => visitor.visit_bool(true),
             Data::Error(ref err) => Err(DeError::CellError {