Finance Tool
APR Calculator
Calculate the true Annual Percentage Rate (APR) of a loan. Include lender fees, closing costs, and interest rates to reveal the true cost of credit.
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Interactive APR Calculator Workspace
True Cost Of Borrowing Summary
True Loan APR6.287% APReffective annual rate
Stated Interest Rate6%nominal rate
Monthly Payment$899.33regular installment
Total Borrow Cost$178,257.28interest + loan fees
Mathematical Formula & Variables
Equation Model
APR = [((Fees + Interest) / Principal) / Term in Days] * 365 * 100The Annual Percentage Rate (APR) formula converts interest charges and fees into a simple standardized yearly percentage representing the true cost of borrowing.
Variable Definitions
| Symbol | Description |
|---|---|
| APR | Annual Percentage Rate |
| Principal | Loan base amount borrowed |
| Interest | Total interest paid over the term |
| Fees | Lender fees, origination charges, and other points |
| Term in Days | Total loan lifespan represented in days |
How to Use the APR Calculator
- Enter the Loan Principal or amount borrowed.
- Specify the Interest Rate (nominal annual percentage rate).
- Input the Loan Term in years or months.
- Enter any additional fees (e.g., origination fees, documentation fees).
- Calculate to reveal your true APR and monthly payment.
Practical Example Calculation
Scenario Context: Calculating the APR on a $100,000 mortgage loan for 30 years with a 6% interest rate and $3,000 in closing fees.
Step 1: Identify values: Principal = $100,000, Interest Rate = 6%, Term = 30 years, Fees = $3,000.
Step 2: Net amount received: $100,000 - $3,000 = $97,000.
Step 3: Calculate standard monthly payment (M) on $100,000 principal: $599.55.
Step 4: Determine the interest rate (r) that satisfies: $599.55 = $97,000 * [r(1+r)^360] / [(1+r)^360 - 1].
Step 5: Solve for APR (by iterating): APR equals approximately 6.31%.
The true Annual Percentage Rate (APR) of the loan is 6.31%, which is higher than the nominal rate of 6% due to upfront fees.
Frequently Asked Questions
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