To use a Pag-IBIG loan calculator as an OFW, you can typically find this tool on the official Pag-IBIG Fund website or other financial service sites. Input details such as your desired loan amount, term length, and interest rate to get an estimate of your monthly repayments. Remember, the actual loan amount and terms will depend on your financial capacity and Pag-IBIG's assessments. Always consider consulting with Pag-IBIG representatives or a financial advisor for personalized guidance based on your circumstances.