Loan Calculator
Runs locally in your browser. Nothing leaves your device.Calculate payments, total interest and repayment with optional extra payments, fully local in your browser.
Calculate payments, interest and total repayment for a fixed-rate loan.
Estimated regular payment
$386.66
Payment interval: Monthly
- Loan amount
- $20,000.00
- Total interest
- $3,199.36
- Total repayment
- $23,199.36
- Scheduled payments
- 60
- Equivalent effective annual rate
- 6.1678%
- Final payment
- $386.66
Show repayment details
| Year | Opening balance | Payments | Principal repaid | Interest | Extra payments | Closing balance |
|---|---|---|---|---|---|---|
| 1 | $20,000.00 | $4,639.87 | $3,536.06 | $1,103.81 | $0.00 | $16,463.94 |
| 2 | $16,463.94 | $4,639.87 | $3,754.16 | $885.71 | $0.00 | $12,709.78 |
| 3 | $12,709.78 | $4,639.87 | $3,985.71 | $654.16 | $0.00 | $8,724.07 |
| 4 | $8,724.07 | $4,639.87 | $4,231.54 | $408.33 | $0.00 | $4,492.53 |
| 5 | $4,492.53 | $4,639.87 | $4,492.53 | $147.34 | $0.00 | $0.00 |
This calculation is an estimate. Fees, insurance, taxes, changing rates, calendar-day rules, rounding and contract terms can change the actual result.
How it works
- 1
Enter loan details
Enter the loan amount, interest rate, term, and payment frequency.
- 2
Optionally enable an extra payment
If needed, set an additional payment per installment to reduce the term and interest.
- 3
Review the result and export the plan
Review the payment, total interest, and repayment, and download the payment plan as a CSV.
Good to know
The loan calculator calculates the payment, interest, and total repayment for a fixed-rate annuity loan directly in your browser. The interest rate can be entered as a nominal or effective annual rate with its own compounding frequency, and the payment frequency ranges from daily through weekly to annual.
Calculation runs locally in the browser. An optional recurring extra payment per installment shows saved payments and interest; fees, insurance, and variable rates can make real offers differ.
Typical use cases
Compare loan offers
Compare the payment and total interest of different offers by setting the nominal or effective annual rate and payment frequency to match each offer.
Check the effect of recurring extra payments
Enable an additional payment per installment to see how many payments and how much interest that saves.
Reuse the payment plan as a CSV
Download the full payment plan with interest and principal portions as a CSV to process further in a spreadsheet.
Tips for better results
Don't confuse nominal and effective rate
Choose the matching rate type for your offer and set the compounding frequency correctly, otherwise the result will deviate from the real payment.
Watch the maximum term
The calculation supports a maximum of 100 years or 5,200 payments; with a very high payment frequency and long term, this limit can be reached faster than expected.
Features
Nominal or effective rate
Enter the rate as nominal or effective, with its own compounding frequency independent of the payment frequency.
Calculate locally
Calculation happens entirely in the browser, without transmission to a server.
Payment plan as a CSV
Download the full payment plan with interest and principal portions per period as a CSV file.
Frequently asked questions
What is the difference between nominal and effective rate?
The nominal rate doesn't account for compounding effects within a year, while the effective annual rate does — depending on the chosen compounding frequency.
Can I factor in a recurring extra payment?
Yes. Enable the option for an additional payment per installment; the tool then shows saved payments and interest compared to the scheduled course.
Are my inputs uploaded?
No. Calculation runs entirely locally in the browser.
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