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Loan calculator: payment and total cost

Amount, term and rate — and you see the payment, total interest and the real rate with fees. Nothing leaves your device.

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Open methodology
010 million
150 years

Enter the amount, term, and rate to calculate the monthly payment

Monthly payment
$871.11
Loan summary
Loan principal
$100,000
Term
180 months
≈ 15 years
Total payments
$156,799
Total interest
$56,799
Cost above principal
$56,799
56.8% of principal
Estimated borrowing cost per year
6.69%
Based on payment timing and the fees you entered
With a 10-year term
−$20,542
less interest, payment $1,135

Uses the loan funding date and each scheduled payment date. Includes the amount received after upfront fees and all later payments. This estimate may differ from the APR disclosed by your lender. Methodology and limitations.

Download the calculation and schedule

Plan extra paymentsAmount, rate, term, currency, and schedule settings will carry over
Monthly payment$871
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Quick startExample scenarios — every value can be changed
Loan breakdownSee how your balance changes and how each payment is split among principal, interest, and fees.
Payment schedule(180 payments)

Swipe the table left or right to see every column.

#DatePaymentPrincipalInterestFeesBalance
1Oct 1, 2026$871.11$329.44$541.67—$99,670.56
2Nov 1, 2026$871.11$331.23$539.88—$99,339.33
3Dec 1, 2026$871.11$333.02$538.09—$99,006.31
4Jan 1, 2027$871.11$334.82$536.28—$98,671.49
5Feb 1, 2027$871.11$336.64$534.47—$98,334.85
6Mar 1, 2027$871.11$338.46$532.65—$97,996.39
7Apr 1, 2027$871.11$340.29$530.81—$97,656.1
8May 1, 2027$871.11$342.14$528.97—$97,313.96
9Jun 1, 2027$871.11$343.99$527.12—$96,969.97
10Jul 1, 2027$871.11$345.85$525.25—$96,624.12
11Aug 1, 2027$871.11$347.73$523.38—$96,276.39
12Sep 1, 2027$871.11$349.61$521.5—$95,926.78

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Why you can trust the numbers

Independent from lenders

LoWi is not affiliated with banks or other lenders. Every offer is run through the same formulas.

Open formulas

The methodology covers the fixed payment, effective rate, calendar dates and rounding.

Your data stays here

Everything is calculated in your browser. Amounts and income are never sent to a server.

Check your lender

Enter the payment from your agreement or import the schedule to see where the lender differs.

What the calculator includes

Fixed-payment and equal-principal repayment options, a down payment, upfront and monthly fees, fees based on the remaining balance, currency, and the first payment date. You can export the schedule to CSV or PDF.

About this estimate

The result is an estimate and does not replace the lender’s payment schedule or the APR disclosed in your agreement. Verify mandatory services, interest rules, and early repayment terms before signing.

Online loan calculator for monthly payments and total interest

Enter the amount, term, and rate to calculate the monthly payment, total payments, interest, fees, total borrowing cost, and a month-by-month repayment schedule. Use it for a first estimate of a personal loan, mortgage, or auto loan.

Loan calculator FAQ

How do I calculate a monthly loan payment?

Enter the loan amount, term, and interest rate. The calculator shows the monthly payment, total interest, overpayment, and repayment schedule.

Can I use a monthly or daily rate?

Yes. Switch the rate type between yearly, monthly, and daily in the calculator form.

What is the difference between fixed payments and equal-principal payments?

With fixed payments, the scheduled principal-and-interest payment is generally the same each month. With equal-principal payments, you repay the same principal each month, so payments start higher and decrease over time.

Can I use it for a mortgage or auto loan?

Yes. You can set the amount, term, rate, down payment, fees, and currency for a mortgage, auto loan, or personal loan estimate.