diff --git a/src/number_format.js b/src/number_format.js
index 14b8cfe0..486e15ad 100644
--- a/src/number_format.js
+++ b/src/number_format.js
@@ -359,6 +359,18 @@ class NumberFormat extends React.Component {
   }
   /** caret specific methods ends **/
 
+  convertFullwidthToHalfwidth = (val: string) => {
+    let ascii = '';
+    for(let i=0, l=val.length; i<l; i++) {
+        let c = val[i].charCodeAt(0);
+        // make sure we only convert half-full width char
+        if (c >= 0xFF00 && c <= 0xFFEF) {
+          c = 0xFF & (c + 0x20);
+        }
+        ascii += String.fromCharCode(c);
+    }
+    return ascii
+  }
 
   /** methods to remove formattting **/
   removePrefixAndSuffix(val: string) {
@@ -603,6 +615,8 @@ class NumberFormat extends React.Component {
     const {selectionStart, selectionEnd} = this.selectionBeforeInput;
     const {start, end} = findChangedIndex(lastValue, value);
 
+    value = this.convertFullwidthToHalfwidth(value)
+
     /** Check if only . is added in the numeric format and replace it with decimal separator */
     if (!format && decimalSeparator !== '.' && start === end && value[selectionStart] === '.') {
       return value.substr(0, selectionStart) + decimalSeparator + value.substr(selectionStart + 1, value.length);