How Much Equity Do I Have? Equity represents the owner's interest in a property, or simply the dollar amount you could sell your home for, minus the dollar amount you still owe on it. Get a quick estimate of your equity using this calculator. $ What is the current market value of your home? $ What is the Principal of your first mortgage (plus any other liens against your home)? This is the maximum amount of equity you have in your home. Note: This calculator is provided to give you a general idea. We cannot guarantee the accuracy or the applicability to your situation. Please consult with Lisa Gibbs.