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Loan Payment Calculator

Looking for a loan payment calculator monthly biweekly weekly? This free tool gives you monthly, bi-weekly and weekly payments for any loan size. Just enter your numbers and press Calculate — results are instant.

How to Use This Loan Payment Calculator

A loan payment depends on the amount, the yearly rate, the term, and how often you pay. The yearly rate is divided by the number of payments per year to get the rate per period, and the same loan formula is used with that many periods. Paying bi-weekly or weekly instead of monthly means you make more payments, each smaller — but over a year you actually pay slightly more, which is why some people choose bi-weekly to clear a loan a little faster.

Formula Used

Payment per period = P × r ÷ (1 − (1+r)^(−n)), where r is the rate per period and n the number of periods. Bi-weekly and weekly payments use the same formula with the rate and periods split accordingly.

Worked Example

Example: Loan amount $20,000 · Term 5 years · Interest rate 6% · Monthly payments

  1. Monthly rate = 6% ÷ 12 = 0.5%, with 5 × 12 = 60 payments.
  2. Payment = $20,000 × 0.005 ÷ (1 − (1.005)^(−60)) = $386.66 per month.
  3. Total paid = $386.66 × 60 = $23,199.36, so the total interest is $3,199.36.

Payment (per period): $386.66

Frequently Asked Questions

Monthly, bi-weekly or weekly — which costs least?

The total interest is very similar, but bi-weekly and weekly payments clear the loan slightly faster, because you pay a little more over the course of a year. The bigger differences come from the rate and the term, not the frequency.

What affects my payment most?

The amount you borrow matters most, then the interest rate, then the term. A longer term lowers the payment but raises the total interest a lot — always check the total, not just the monthly figure.

How do I know if I can afford a payment?

A common lender guideline is to keep all your monthly debt payments below roughly 36% of your gross monthly income. Leave room for everything else in your budget before you commit.

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