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Program to convert speed in km/hr to m/sec and vice versa
  • Last Updated : 11 May, 2018

Convert speed given in km/hr to m/sec and vice versa .

Examples:

Input : kmph = 72, mps = 10
Output : speed_in_mps = 20
         speed_in_kmph = 36 

Input : kmph = 54, mps = 15
Output : speed_in_mps = 15
         speed_in_kmph = 54 

Approach:
1 km = 1000 m and 1 hr = 3600 sec (60 min x 60 sec each).

Conversion from Km/h to m/sec-
When converting km/hr to m/sec, multiply the speed with 1000 and divide the result with 3600.



1 km/hr = 5/18 m/sec or 0.277778 m/sec 

Conversion from m/sec to km/h-
When Converting m/sec to km/hr, divide the speed with 1000 and multiply the result with 3600.

1 m/sec = 18/5 km/hr or 3.6 km/hr

Below is the program implementation:

C++

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// CPP program to convert  
// kmph to mps and vice versa
#include <bits/stdc++.h>
using namespace std;
  
// function to convert speed
// in km/hr to m/sec
float kmph_to_mps(float kmph)
{
    return (0.277778 * kmph);
}
  
// function to convert speed
// in m/sec to km/hr
float mps_to_kmph(float mps)
{
    return (3.6 * mps);
}
  
// driver function
int main()
{
    // variable to store
    // speed in kmph
    float kmph = 72.0;
      
    // variable to store
    // speed in mps
    float mps = 10.0;
      
    cout << "speed_in_mps = " << kmph_to_mps(kmph) 
         << " speed_in_kmph = " << mps_to_kmph(mps);
           
    return 0;
}

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Java

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// Java program to convert 
// kmph to mps and vice versa
import java.io.*;
  
class GFG 
{
    // function to convert speed
    // in km/hr to m/sec
    static int kmph_to_mps(double kmph)
    {
        return(int) (0.277778 * kmph);
    }
      
    // function to convert speed
    // in m/sec to km/hr
    static int mps_to_kmph(double mps)
    {
        return(int) (3.6 * mps);
    }
      
    // Driver function
    public static void main (String[] args) 
    {
        // variable to store
        // speed in kmph
        double kmph = 72.0;
          
        // variable to store
        // speed in mps
        double mps = 10.0;
          
        System.out.println("speed_in_mps = " + kmph_to_mps(kmph) 
                          + " speed_in_kmph = " +mps_to_kmph(mps));
      
    }
}
  
// This code is contributed by vt_m.

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Python3

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# Python3 program to convert 
# kmph to mps and vice versa
  
# Function to convert speed
# in km/hr to m/sec
def kmph_to_mps(kmph):
  
    return (0.277778 * kmph)
  
# Function to convert speed
# in m/sec to km/hr
def mps_to_kmph(mps):
  
    return (3.6 * mps)
  
# Driver Code
  
# variable to store
# speed in kmph
kmph = 72.0
      
# variable to store
# speed in mps
mps = 10.0
      
print("speed_in_mps = ", int(kmph_to_mps(kmph)) ,
      " speed_in_kmph = ", int(mps_to_kmph(mps)))
          
# This code is contributed by Anant Agarwal.

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C#

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// C# program to convert
// kmph to mps and vice versa
using System;
  
class GFG {
      
    // function to convert speed
    // in km/hr to m/sec
    static int kmph_to_mps(double kmph)
    {
        return (int)(0.277778 * kmph);
    }
  
    // function to convert speed
    // in m/sec to km/hr
    static int mps_to_kmph(double mps)
    {
        return (int)(3.6 * mps);
    }
  
    // Driver function
    public static void Main()
    {
        // variable to store
        // speed in kmph
        double kmph = 72.0;
  
        // variable to store
        // speed in mps
        double mps = 10.0;
  
        Console.WriteLine("speed_in_mps = " + kmph_to_mps(kmph) +
                        " speed_in_kmph = " + mps_to_kmph(mps));
    }
}
  
// This code is contributed by vt_m.

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PHP

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<?php
// PHP program to convert 
// kmph to mps and vice versa
  
    // function to convert speed
    // in km/hr to m/sec
    function kmph_to_mps($kmph)
    {
        return floor(0.277778 * $kmph);
    }
      
    // function to convert speed
    // in m/sec to km/hr
    function mps_to_kmph( $mps)
    {
        return (3.6 * $mps);
    }
  
    // Driver Code
    // variable to store
    // speed in kmph
    $kmph = 72.0;
      
    // variable to store
    // speed in mps
    $mps = 10.0;
      
    echo "speed_in_mps = "
          kmph_to_mps($kmph
          ," speed_in_kmph = "
          mps_to_kmph($mps);
          
// This code is contributed by anuj_67.
?>

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Output:

speed_in_mps = 20 speed_in_kmph = 36



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