@wikipedia


OCF = Net Income +  Non-Cash Expenses  - Increase in Working Capital 


OCF = Net Income +  Non-Cash Expenses  - ( Closing Working Capital - Opening Working Capital )


OCF = EBITDA + Non-Operating Revenue -  Non-Recurring Expenses -  Interest -  Income Tax - Increase in Working Capital 


See also


Economics / Money / Currency / Cash / Cash Flow 

Business / Business Administration / Financial Management / Financial Accounting 

Free Cash Flow (FCF) ][ Profit and Loss ]


References


Investopedia: Operating Cash Flow