TetraKits
Loan Calculator
Calculate monthly loan payments, total interest paid, and a full amortization schedule. Enter loan amount, annual interest rate, and term in years — see payment breakdown and how principal vs interest shifts over time.
Read: How to Calculate Loan Payments (Mortgage & Auto Formula Guide) →
- 40+ Currencies
- Free to Use
- Instant Results
| Year | Principal paid | Interest paid | Remaining balance |
|---|
How to calculate loan payments
- 1
Enter loan details
Type principal (loan amount), annual interest rate, and term in years. Example: $20,000 at 6% for 5 years.
- 2
Read monthly payment
See fixed monthly payment using standard amortization: M = P[r(1+r)^n]/[(1+r)^n−1].
- 3
Review amortization
Check total interest and payment schedule. For home loans, use the mortgage calculator.
Why Use This Calculator?
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Free Forever
Run unlimited loan estimates with no subscriptions or hidden fees.
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Multi-Currency
View payments in 40+ currencies with the same floating selector.
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Live Updates
See monthly payment and total cost update as you adjust inputs.
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Privacy Friendly
All calculations run in your browser. Your loan details stay private.
Frequently Asked Questions
How is the monthly payment calculated?
Standard amortization formula: M = P × [r(1+r)^n] / [(1+r)^n − 1], where P = principal, r = monthly rate, n = total months.
Does this include taxes or insurance?
No. This calculates principal and interest only. Mortgages often add escrow for taxes and insurance separately.
Can I see how much goes to interest vs principal?
Yes. The amortization schedule shows each payment split between principal reduction and interest cost.
What is the difference between this and the mortgage calculator?
This handles general loans. The mortgage calculator adds down payment, PMI, and home-specific fields.
Is this loan calculator free?
Yes. Unlimited calculations with no signup.
Loan Payments Before You Sign
Auto loans, personal loans, and equipment financing all use the same amortization math — but lenders quote different rates and terms. Model monthly payments and total interest cost before committing to a loan.
Adjust the loan amount, rate, and term to compare scenarios instantly. Everything runs locally in your browser for complete privacy.
