FREE ONLINE REAL ESTATE CALCULATORS
Use simple real estate calculators to estimate mortgage payments, home affordability, loan payments, and loan-to-value ratios before you make an offer.
Plan Your Property Purchase With Real Numbers
Buying a home is one of the largest financial commitments most people ever make, and small differences in the math can mean tens of thousands of dollars over the life of a loan. The free real estate calculators above help you estimate monthly mortgage payments, check how much house fits your budget, compare loan structures, and understand your loan-to-value ratio — all before you sit down with a lender.
How mortgage payments are calculated
Your monthly mortgage payment is set by four inputs: the loan principal, the annual interest rate, the loan term in years, and any costs bundled into the payment such as property tax or homeowner's insurance. Lenders amortize the loan with the standard formula:
M = P × r(1+r)n / ((1+r)n − 1)
Here M is the monthly payment, P is the principal borrowed, r is the monthly interest rate (annual rate divided by 12), and n is the total number of monthly payments. Because interest compounds monthly, even a half-point change in the rate can shift your payment by hundreds of dollars — run a few scenarios with the mortgage calculator to see the effect.
How much house can you afford?
Lenders commonly apply the 28/36 rule: keep total housing costs at or below 28% of your gross monthly income, and keep all recurring debt payments at or below 36%. The House Affordability Calculator uses your income, debts, down payment, and current rates to estimate a comfortable price range instead of a maximum one.
Understanding loan-to-value (LTV)
LTV compares what you borrow against what the property is worth:
LTV = (Loan Amount ÷ Appraised Value) × 100
An LTV of 80% or lower usually unlocks better interest rates and lets you avoid private mortgage insurance (PMI). A larger down payment lowers your LTV, your monthly payment, and the total interest you pay.
Real Estate Calculator FAQs
How is my monthly mortgage payment calculated?
It is calculated with the amortization formula M = P × r(1+r)n / ((1+r)n − 1), using your loan amount, monthly interest rate, and number of payments. Taxes and insurance are added on top if they are escrowed. Try the Mortgage Calculator above to see the full breakdown.
How much house can I afford on my salary?
A widely used guideline is the 28/36 rule: housing costs up to 28% of gross monthly income, and total debt payments up to 36%. Enter your income and debts in the House Affordability Calculator for a personalized estimate.
What is a good loan-to-value (LTV) ratio?
An LTV of 80% or below is considered strong — it typically means better rates and no PMI. Use the LTV Calculator to check your ratio for any down payment and purchase price.