Mortgage Refinance Calculator

Mortgage Refinance Calculator

Estimate the new principal-and-interest payment after refinancing and compare it with your current mortgage payment.

ทำความเข้าใจคำตอบ

คำนวณอย่างไร?

The calculation amortizes the remaining balance over the new term at the new fixed rate. Closing costs, cash-out proceeds, escrow and prepayment penalties are excluded unless added to the new balance.

Refinance payment formulaNew payment = P × r(1 + r)ⁿ ÷ ((1 + r)ⁿ − 1)

ตัวอย่างที่ใช้ได้จริง

Refinancing a $280,000 balance at 5.5% for 25 years produces an estimated principal-and-interest payment near $1,720 per month before closing costs.

ผลลัพธ์ที่คำนวณได้

Remaining loan balanceNew annual rateคำตอบที่คำนวณ
$224,000.005.5%$1,271.85
$280,000.005.5%$1,589.81
$336,000.005.5%$1,907.77

สมมติฐาน การตีความ และข้อผิดพลาดที่พบบ่อย

สมมติฐานการคำนวณ

  • Rates and recurring amounts stay constant for the period represented by the formula.
  • Inputs use the same monthly or annual time basis stated in each field label.
  • Taxes, fees and contractual rules are excluded unless the calculator explicitly asks for them.

วิธีตีความผลลัพธ์

  • Use the headline as a planning estimate and compare it with the detailed totals.
  • Run a baseline plus favorable and conservative scenarios before deciding.
  • Confirm important results against a lender, payroll statement, tax authority or signed contract as applicable.

ข้อผิดพลาดที่พบบ่อยซึ่งควรหลีกเลี่ยง

  • Mixing annual rates with monthly amounts or entering a percentage as a decimal.
  • Leaving out fees, taxes, changing rates or timing differences that apply to the real decision.
  • Treating approval guidelines, market returns or future appreciation as guarantees.