A HELOC can be a useful financial option, but it’s important to understand the potential borrowing amount and repayment costs before moving forward. Home value, current mortgage balance, interest rates, and other factors can all influence the numbers. I came across this HELOC Calculator that makes it easier to estimate available equity and explore different borrowing scenarios. Running a few calculations beforehand can give you a clearer idea of the possible monthly costs and help you plan your finances with more confidence.