Loan Calculator
Calculate monthly payments, interest & total cost
About the Loan Calculator
Whether it is a mortgage, a car loan, or a personal loan, the questions are the same: what is the monthly payment, and how much will it cost in total? This Loan Calculator answers both, then lays out a complete amortization schedule so you can see every payment split between interest and principal.
Home buyers use it to test what they can afford at different rates; car shoppers compare financing terms; borrowers of any kind use it to understand the true cost beyond the sticker. The amortization table is the centerpiece — it reveals how early payments are mostly interest and how the balance accelerates downward over time, which a single monthly figure can never show.
How to Use the Loan Calculator
- Choose a loan type (mortgage, auto, personal, or other) to label your calculation.
- Enter the loan amount and the annual interest rate.
- Enter the loan term and choose whether it is in years or months.
- Read the monthly payment, total interest, and total cost.
- Expand the amortization schedule to see each payment's principal, interest, and remaining balance.
Why Use ToolForge’s Loan Calculator
- It generates a full amortization schedule, showing how each payment divides between interest and principal across the entire term.
- It accepts the term in either years or months, so it fits everything from a 30-year mortgage to a short personal loan.
- It handles a zero-interest loan correctly rather than breaking on the math, and validates inputs against impossible values.
- Everything is computed in your browser with no account, keeping loan figures private.
Frequently Asked Questions
How is a monthly loan payment calculated?
It uses the standard amortization formula, which spreads principal and interest evenly so every payment is the same. The payment depends on the loan amount, the monthly interest rate, and the number of payments — all of which this calculator takes as input.
Why is so much of my early payment interest?
Interest is charged on the outstanding balance, which is highest at the start. Early payments therefore go largely to interest, with more shifting to principal as the balance falls. The amortization schedule shows this crossover month by month.
Does choosing a loan type change the result?
The loan-type selector is a label to help you organize your calculations; the math is the same standard amortization regardless of type. Rates and terms differ between loan types in the real world, so enter the actual rate and term for your specific loan.
