All tools Loan Calculator ● Live Data Tools This calculator is for informational estimates only and is not financial advice. Confirm loan terms with a qualified lender.

How Loan Calculator works

  1. Enter the loan principal (amount borrowed).
  2. Enter the annual interest rate.
  3. Enter the loan term, toggling between years and months.
  4. View the monthly payment, total payment, total interest, and amortization table.
  • Estimate monthly payments for a mortgage before applying.
  • Compare total interest paid across different loan terms.
  • Check how much of an early payment goes toward principal vs interest.
  • Calculate a car loan payment for budgeting purposes.
  • Understand how a higher interest rate affects total loan cost.

All calculations happen locally in your browser. Your financial figures are never sent to a server.

  • Shows principal and interest only — taxes, insurance, PMI, and fees are excluded.
  • Assumes a fixed interest rate for the full term — doesn't model variable-rate loans.
  • Amortization table displays up to 60 months even for longer loan terms.

Loan Calculator

Loan Calculator uses the standard PMT amortization formula to compute monthly payment, total payment, and total interest for a loan given the principal, annual interest rate, and term. An amortization table shows the first 60 months (or all months for shorter loans).

Loan Calculator Runs locally

Loan details

Monthly Payment
$299.71
Total Payment
$10,789.52
Total Interest
$789.52

Amortization schedule (first 36 months)

MonthPaymentPrincipalInterestBalance
1$299.71$258.04$41.67$9,741.96
2$299.71$259.12$40.59$9,482.84
3$299.71$260.20$39.51$9,222.64
4$299.71$261.28$38.43$8,961.36
5$299.71$262.37$37.34$8,698.99
6$299.71$263.46$36.25$8,435.53
7$299.71$264.56$35.15$8,170.97
8$299.71$265.66$34.05$7,905.30
9$299.71$266.77$32.94$7,638.53
10$299.71$267.88$31.83$7,370.65
11$299.71$269.00$30.71$7,101.65
12$299.71$270.12$29.59$6,831.54
13$299.71$271.24$28.46$6,560.29
14$299.71$272.37$27.33$6,287.92
15$299.71$273.51$26.20$6,014.41
16$299.71$274.65$25.06$5,739.76
17$299.71$275.79$23.92$5,463.97
18$299.71$276.94$22.77$5,187.02
19$299.71$278.10$21.61$4,908.93
20$299.71$279.26$20.45$4,629.67
21$299.71$280.42$19.29$4,349.25
22$299.71$281.59$18.12$4,067.67
23$299.71$282.76$16.95$3,784.91
24$299.71$283.94$15.77$3,500.97
25$299.71$285.12$14.59$3,215.85
26$299.71$286.31$13.40$2,929.54
27$299.71$287.50$12.21$2,642.03
28$299.71$288.70$11.01$2,353.33
29$299.71$289.90$9.81$2,063.43
30$299.71$291.11$8.60$1,772.32
31$299.71$292.32$7.38$1,479.99
32$299.71$293.54$6.17$1,186.45
33$299.71$294.77$4.94$891.69
34$299.71$295.99$3.72$595.69
35$299.71$297.23$2.48$298.47
36$299.71$298.47$1.24$0.00
Guide

How to use

  1. Enter the loan principal (amount borrowed).

  2. Enter the annual interest rate.

  3. Enter the loan term, toggling between years and months.

  4. View the monthly payment, total payment, total interest, and amortization table.

Scenarios

Use cases

  • Estimate monthly payments for a mortgage before applying.

  • Compare total interest paid across different loan terms.

  • Check how much of an early payment goes toward principal vs interest.

  • Calculate a car loan payment for budgeting purposes.

  • Understand how a higher interest rate affects total loan cost.

Good to know

Limitations & Privacy

Private by design

All calculations happen locally in your browser. Your financial figures are never sent to a server.

  • Shows principal and interest only — taxes, insurance, PMI, and fees are excluded.

  • Assumes a fixed interest rate for the full term — doesn't model variable-rate loans.

  • Amortization table displays up to 60 months even for longer loan terms.

FAQ

Frequently asked questions

What formula is used?

The standard PMT (payment) formula: PMT = P × r × (1+r)^n / ((1+r)^n - 1), where P is principal, r is the monthly interest rate, and n is the number of payments.

Does it account for fees or insurance?

No. This calculator shows the pure principal + interest payment. Property taxes, insurance, PMI, and origination fees aren't included — consult a financial advisor for a full cost picture.

What does the amortization table show?

For each of the first 60 months (or all months for shorter loans), it shows the payment split between principal and interest, and the remaining balance after that payment.

Why does more of my payment go to interest early in the loan?

This is normal amortization behavior — interest is calculated on the remaining balance, which is highest at the start, so early payments are interest-heavy and later payments are principal-heavy.

Can I use this for a mortgage, car loan, or personal loan?

Yes — the PMT formula applies to any fixed-rate, fixed-term amortizing loan, including mortgages, auto loans, and personal loans.

What if my loan term is in months instead of years?

The tool lets you toggle the term input between years and months, so you can enter the term in whichever unit your loan documents use.

How accurate is the total interest figure?

It's mathematically exact for a fixed-rate loan with the entered principal, rate, and term — assuming no extra payments, rate changes, or fees are applied.