Loan Calculator

Calculate monthly payments and total interest for mortgages, car loans, or personal loans instantly.

100% Private. Local processing.
$ LOAN
ANNUAL
YEARS
$ 1,703.37
Total Interest
$313,213
Total Payment
$613,213
Principal Interest
49% 51%
Estimates based on a fixed interest rate for the entire term.

How to calculate your loan

1

Enter Amount

Type in the total principal amount you intend to borrow (e.g., $300,000 for a mortgage).

2

Set Interest & Term

Input the annual interest rate and the duration of the loan in years or months.

3

Review Results

Instantly see your monthly payment and how much total interest you'll pay over the life of the loan.

The Impact of Interest

On long-term loans like a 30-year mortgage, even a 0.5% difference in interest rate can save or cost you tens of thousands of dollars. Use this tool to compare different scenarios and find the most affordable option for your budget.

Lower Rate = Less Total Interest
Shorter Term = Higher Monthly, Lower Total

Built for Clarity and Privacy

Instant Computation

Results update in real-time as you adjust any parameter. No buttons, just immediate financial feedback.

100% Secure

Your financial data stays on your device. We use local browser processing, so nothing is ever uploaded to a server.

Visual Breakdown

Understand the ratio of principal vs. interest with our dynamic progress bar visualization.

Flexible Terms

Calculate loans in years or months. Perfect for both 30-year mortgages and 36-month car loans.

Loan FAQ

What formula do you use?
We use the standard amortization formula: M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ], where M is the monthly payment, P is the principal, i is the monthly interest rate, and n is the number of months.
Does this include taxes and insurance?
No. This is a basic principal and interest calculator. It does not account for property taxes, homeowners insurance, or private mortgage insurance (PMI), which are often included in a bank's quote.