Direct Answer: To calculate your monthly loan payment, multiply your principal by the monthly interest rate, then divide by 1 minus (1 plus rate) raised to the negative number of months. Enter your loan amount, interest rate, and term below to calculate your exact payment and lifetime interest.
This free tool provides a quick, transparent estimate for calculating fixed monthly loan payments, total interest accrual, and overall borrowing costs.
M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
✅ All calculations are performed in your browser. We do not store, share, or transmit your personal data.
This calculator estimates your monthly loan payments, total interest, and full amortization schedule using standard financial mathematics. We are committed to transparency—here is exactly how it works.
Your monthly payment is calculated using the standard amortizing loan formula for fixed-rate loans:
M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
Where:
The calculator also models the impact of extra monthly payments by recalculating the amortization schedule with the adjusted payment amount. The remaining balance is reduced each month, and total interest is recalculated based on the accelerated payoff timeline.
This calculator uses the following assumptions:
Primary Data Sources:
⚠️ Important Limitations:
🛡️ Professional Advice Disclaimer: The TrueCalco Loan Calculator is a general estimation tool. It does not constitute financial or legal advice. We strongly recommend consulting a qualified financial advisor or loan officer before making any borrowing decisions.
✅ All calculations run in your browser. No data you enter—including your loan amount, interest rate, or personal information—is ever transmitted to our servers or stored. TrueCalco is 100% client-side.
A personal loan payment calculator determines your fixed monthly amortization, interest paid, and payoff schedule across personal, auto, and debt consolidation loans.
M = P[r(1+r)ⁿ] ÷ [(1+r)ⁿ - 1]| Variable | Description & Context | Measurement Unit | Sample Input |
|---|---|---|---|
Loan Amount |
Loan Amount ($) | $ | 25000 |
Annual Interest Rate |
Annual Interest Rate (%) | % | 7.5 |
Loan Term |
Loan Term (Years) | Years | 5 |
Extra Monthly Payment |
Extra Monthly Payment ($) | $ | 0 |
Understanding these foundational concepts ensures you interpret your results with precision:
Installment loans allow you to finance major expenses with predictable fixed payments. Unlike credit cards that compound daily on revolving balances, fixed installment loans amortize principal and interest over a set duration.
Because interest accrues based on your outstanding principal balance, every additional dollar applied directly to principal stops future interest compounding. Even a modest $50/month extra payment can eliminate months of debt and save hundreds in financing costs.
If you're considering borrowing money to fund a business expansion, use our ROI Calculator to ensure your projected returns exceed your cost of borrowing.
Before taking out a loan, use our Savings Calculator to see if you could reach your goal by saving instead of borrowing.
A longer loan term (such as 72 months instead of 48) lowers your mandatory monthly payment, but significantly increases the cumulative lifetime interest you pay to the lender.
Example: Loan $25,000 at 7.5% for 5 years = $500.95/month, Total Interest $5,057.19
| Computation Step | Formula / Input Parameter | Calculated Output |
|---|---|---|
| 1. Applied Formula | M = P[r(1+r)ⁿ] ÷ [(1+r)ⁿ - 1] |
Mathematical Standard |
| 2. Applied Scenario | Loan $25,000 at 7.5% for 5 years | Standard Calculation Run |
| 3. Final Result | Verified Calculation Output | $500.95/month, Total Interest $5,057.19 |
Learn how to calculate loan payments using the standard formula. Understand principal vs. interest, amortization schedules, and use our free calculator to estimate your monthly payments.
Read the Full Guide: How to Calculate Loan Payments: Formula, Examples & Free Calculator →