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Java program to get the size of give file in bytes, kilobytes and megabytes

In this Java program, we are going to learn how to get the size of a given file in bytes, kilobytes and megabytes?
Submitted by IncludeHelp, on October 27, 2017

Given a file and we have to get the file size using Java program.


This is a method of "File" class, which returns the file’s length (file size) in bytes.

In this program, we are using a file named "includehelp.txt" which is stored in "E:\" in my system, program will get its size in bytes and then we will convert file size in kilobytes and megabytes.

Program to get size of given file in Java

import java.io.*;

public class ReturnFileSize 
	public static void main(String[] args) 
		//create file object.
		// enter the file name.
		File file = new File("E:/includehelp.txt");

		// calculate the size of the file.
		long fileSize = file.length();

		// return the file size in bytes,KB and MB.
		System.out.println("File size in bytes is : " + fileSize);
		System.out.println("File size in KB is : " + (double)fileSize/1024);
		System.out.println("File size in MB is : " + (double)fileSize/(1024*1024));


File size in bytes is : 41
File size in KB is : 0.0400390625
File size in MB is : 3.910064697265625E-5