Mortgage Calculator Online
Estimate your monthly mortgage payment, including taxes, insurance, HOA and PMI, right in your browser. Your loan figures stay on your device.
The Mortgage Calculator runs entirely in your browser. The home price, rate, and any tax, insurance, HOA or PMI figures you enter never leave your device. Results are estimates only, not financial advice.
Open the Loan Calculator
About Mortgage Calculator
Mortgage Calculator estimates the monthly payment on a fixed-rate home loan from the price, down payment, interest rate and term you enter. It breaks the payment down into principal & interest, then folds in optional yearly property tax, homeowners insurance, monthly HOA dues and PMI so you see the realistic all-in monthly total, not just the loan math. A full amortization schedule shows how much of each payment goes to interest versus principal over the life of the loan. It is useful for homebuyers comparing lenders, agents sketching affordability for a client, or anyone rate-shopping before signing paperwork. These are estimates only, not financial advice — verify final numbers with your lender. Every calculation runs locally in your browser; nothing is uploaded.
Features
- Computes the monthly principal & interest payment from price, rate and term
- Subtracts an optional down payment from the home price automatically
- Adds yearly property tax and homeowners insurance as a monthly amount
- Folds in monthly HOA dues and PMI for a realistic all-in monthly total
- Shows total interest paid and total amount paid over the full term
- Full month-by-month amortization schedule, capped for fast scrolling
- One-click copy of a plain-text summary for sharing or note-taking
- Runs entirely in your browser — your loan figures never leave your device
How to use the Mortgage Calculator
- Enter the home price and, if you have one, the down payment
- Enter the annual interest rate and the loan term in years
- Optionally add yearly property tax, insurance, monthly HOA and PMI
- Read the monthly total and total interest, or expand the amortization schedule
Example
Input
$200,000 loan, 6% APR, 30 yr
Output
Principal & interest: $1,199.10 / mo
Total interest: $231,676.38
Common errors & troubleshooting
- Monthly payment looks far too high. — Check the interest rate field is entered as a percent (6, not 0.06) and that the term is in years, not months.
- Monthly total doesn't match a lender's quote. — Lenders often bundle other fees or use a slightly different tax/insurance estimate — add your exact yearly tax and insurance figures for a closer match.
- Down payment larger than the home price gives a strange result. — The down payment is subtracted from the home price to get the loan amount, so keep it smaller than the price or leave it blank for a 0% down loan.
- Amortization schedule looks capped. — The table shows the first 24 rows for speed; the note beneath it states the full payment count so you know the schedule continues to payoff.
Frequently asked questions
- What does the Mortgage Calculator include in the monthly total?
- Principal & interest, plus any yearly property tax and homeowners insurance you enter (spread across 12 months), plus monthly HOA dues and PMI you add. Leave the optional fields blank to see principal & interest alone.
- How does the Mortgage Calculator compute the monthly payment?
- It uses the standard amortized-loan formula: M = P × r × (1+r)^n ÷ ((1+r)^n − 1), where r is the monthly interest rate and n is the number of monthly payments. A 0% rate simply spreads the loan evenly across the term.
- Is the Mortgage Calculator's estimate exact?
- No — it is an estimate only, not financial advice. Actual mortgage terms, fees, and rates vary by lender, so confirm the final numbers with a loan officer before signing.
- Does the Mortgage Calculator show an amortization schedule?
- Yes. Expand the amortization schedule to see each payment's split between interest and principal and the remaining balance, month by month, capped to the first rows for readability.
- Does the Mortgage Calculator upload my loan numbers anywhere?
- No. Every calculation happens locally in your browser. The price, rate, term, and any tax or insurance figures you enter are not sent to ArrayKit or anywhere else.
- Can I use the Mortgage Calculator without a down payment?
- Yes. Leave the down payment field blank or at 0 and the full home price is used as the loan amount.
Related tools
All ArrayKit tools