Library help to convert units.
- Acceleration
 - Angle
 - Area
 - Storage
 - Current
 - Fuel
 - Length
 - Mass
 - Pressure
 - Speed
 - Temperature
 - Time
 - Voltage
 - Volume
 
- Add below line to 
composer.json 
// ...
"abhimanyusharma003/conversion": "dev-master"
 // ...- 
Run
composer updateorcomposer install - 
Open
config/app.phpand add the service provider to yourprovidersarray. 
    Abhimanyu003\Conversion\ConversionServiceProvider::class- Add Aliases
 
    'Conversion'  => Abhimanyu003\Conversion\Facades\Conversion::classConversion::convert($value,'type')->to('type');Formatting results use
Conversion::convert($value,'type')->to('type')
->format(int decimal,'decimal place modifier','thousand place modifer');- Converting MB to kb
 
Conversion::convert(1, 'megabyte')->to('kilobyte'); // output 1,024.00 ( two decimal place )
// Formatting the output
Conversion::convert(1, 'megabyte')->to('kilobyte')->format(0,'.',','); // output 1,024 ( no decimal place )- Converting mm to cm
 
Conversion::convert(1000,'millimetre')->to('centimetre');- Converting kg to g
 
Conversion::convert(1,'kilogram')->to('gram');   METRE_PER_SECOND_SQUARE
   TURN                  
   RADIAN                
   DEGREE                
   GRADIAN               
   SQUARE_METRE          
   HECTARE               
   SQUARE_KILOMETRE      
   SQUARE_INCH           
   SQUARE_FEET           
   SQUARE_YARD           
   ACRE                  
   SQUARE_MILE           
   BIT                   
   BYTE                  
   KILOBIT               
   KILOBYTE              
   MEGABIT               
   MEGABYTE              
   GIGABIT               
   GIGABYTE              
   TERABIT               
   TERABYTE              
   PETABIT               
   PETABYTE              
   STATAMPERE            
   MICROAMPERE           
   MILLIAMPERE           
   AMPERE                
   ABAMPERE              
   KILOAMPERE            
   KILOMETRES_PER_LITRE  
   LITRE_PER_100_KILOMETRE
   MILES_PER_GALLON      
   US_MILES_PER_GALLON   
   MILLIMETRE            
   CENTIMETRE            
   METRE                 
   KILOMETRE             
   INCH                  
   FOOT                  
   YARD                  
   MILE                  
   NAUTICAL_MILE         
   MICROGRAM             
   MILLIGRAM             
   GRAM                  
   KILOGRAM              
   METRIC_TON            
   OUNCE                 
   POUND                 
   STONE                 
   SHORT_TON             
   LONG_TON              
   PASCAL                
   KILOPASCAL            
   MEGAPASCAL            
   BAR                   
   MILLIMETRES_OF_MERCURY
   INCHES_OF_MERCURY     
   POUNDS_PER_SQUARE_INCH
   ATMOSPHERE            
   METRE_PER_SECOND      
   KILOMETRES_PER_HOUR   
   FEET_PER_SECOND       
   MILES_PER_HOUR        
   KNOT                  
   CELSIUS               
   FAHRENHEIT            
   KELVIN                
   NANOSECOND            
   MICROSECOND           
   MILLISECOND           
   SECOND                
   MINUTE                
   HOUR                  
   DAY                   
   WEEK                  
   MONTH                 
   YEAR                  
   DECADE                
   CENTURY               
   MILLENIUM             
   VOLT                  
   KILOVOLT              
   MILLILITRE            
   LITRE                 
   CUBIC_METRE           
   GALLON                
   QUART                 
   PINT                  
   TABLESPOON            
   TEASPOON              
   US_GALLON             
   US_QUART              
   US_PINT               
   US_CUP                
   US_OUNCE              
   US_TABLESPOON         
   US_TEASPOON           
   CUBIC_INCH            
   CUBIC_FOOT            
Feel free to contribute and update the rep.