Loan Calculator
Estimate monthly payments and total interest for fixed-rate loans.
Everything is calculated in your browser. Nothing you enter is sent anywhere.
Tool
Loan details
Everything is calculated in your browser.
Why Dockzio?
Simple tools that respect your time and your privacy.
Free and instant
No subscriptions, no paywalls, no waiting.
No sign-up required
Open a tool and get to work immediately.
Private by design
Processing happens locally in your browser whenever possible.
Beautifully built
Clean, fast interfaces designed for everyday productivity.
About the loan calculator
Estimate fixed-rate monthly payments, total interest, and payoff time for personal, auto, or similar installment loans. Add optional extra principal to see how much sooner the loan can be paid off.
How it works
Monthly payment uses standard amortization. Extra payments reduce principal each month and can shorten the schedule.
Best for
Auto loans, personal loans, and other fixed-rate installment debt. For home loans with down payment modeling, use the Mortgage Calculator.
Limitations
Assumes a fixed rate. Origination fees, insurance, and variable rates are not modeled. Results are educational estimates, not loan offers.
Privacy first
All calculations run locally in your browser. Nothing you type is sent to a Dockzio server.
FAQ
Quick answers to common questions.