// multi-utility computation suite · offline · instant · precise
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real.mortgage Calculator
Calculates monthly mortgage payment, total interest over the amortisation period, and payoff date from principal, rate, and amortisation years. Most homeowners have never seen the total interest figure — it's often larger than the original loan.
Inputs
Price
The agreed sale price of the home. Your down payment is typically a percentage of this figure.
Down
Cash paid upfront, reducing the amount you borrow. Putting down 20%+ typically eliminates private mortgage insurance (PMI).
Rate
Yearly rate as a percentage. The calculator converts this to the appropriate period rate automatically.
Years
Reference formula or conversion factor shown for context.
Results
monthly payment
Fixed monthly instalment covering principal and interest. Does not include property tax or insurance unless explicitly shown.
total interest paid
Total interest paid over the life of the loan — the real cost of borrowing. On a $400k 30-year loan at 7%, this often exceeds $550,000.
total paid
Sum of all payments made — principal plus all interest. Subtract the loan amount to see the pure interest cost.
LTV ratio
Loan-to-value ratio — loan as % of property value. Above 80%: PMI typically required. Above 95%: high-risk to lenders. Below 80%: PMI can be removed.