The equation
Payments follow Payment = P × r / (1 - (1 + r)^{-n}) where P is principal,r is the periodic interest rate and n is the number of payments. We convert annual rates to monthly before running the math.
Calculator
Loan Calculator
Payments, totals and your first year amortisation at a glance.
Result
Monthly€365
Total interest€2,544
Total paid€17,544
Bars show principal vs interest for your first 12 payments. Balance is updated after each payment.
Guide
Understanding Loan Payments
QuickCalc uses the standard amortisation formula to show how much you owe each month, how much of that payment is interest and how quickly the balance declines. Adjust the rate or term to see the trade-offs instantly.
- Fixed-payment amortisation for any loan size and rate.
- First-year bars highlight the principal vs. interest mix.
- Interest share ring reveals how expensive the loan really is.
Interpreting the visuals
The circular meter shows how much of the total paid over the life of the loan goes to interest. The bar chart plots the first 12 months, making it easy to see how principal share grows as the balance shrinks.
Planning decisions
Shorter terms cost more each month but save interest. Longer terms lower the payment but increase interest share. Use the calculator to test terms, rates and extra payments before signing paperwork.