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Simple Loan Calculator

This simple loan calculator computes interest without compounding, using the original principal for the whole term, then shows the total due and the equal monthly share.

The lowest rates are only available to the most qualified applicants.

Advertising disclosure: Loancalculated may receive a referral fee if you apply through the link above. That fee does not change the rate you are offered, and it does not change our content. We are not a lender. Read the full disclosure.

By the Loancalculated Editorial Team · Last updated 2026-09-16

Enter your numbers and press Calculate. Nothing you type leaves your browser.

Compare personal loan offers Run the numbers first

The lowest rates are only available to the most qualified applicants.

Advertising disclosure: Loancalculated may receive a referral fee if you apply through the link above. That fee does not change the rate you are offered, and it does not change our content. We are not a lender. Read the full disclosure.

How this calculator works

Simple interest is charged on the original principal for the whole term. It does not compound, so the interest never earns interest of its own.

Interest = P × annual rate ÷ 100 × (months ÷ 12).

Total due = P + interest. Dividing that by the number of months gives the equal monthly share if the loan is repaid in level installments.

Rates vary by lender and credit profile, so enter your own figure.

Frequently asked questions

How is simple interest different from amortized interest?
Simple interest is figured on the original principal for the entire term. An amortized loan charges interest on the declining balance, so the two can differ.
Does the interest compound here?
No. This is straight-line simple interest, so interest is never added to principal to earn more interest.
What is the monthly figure?
The total due divided by the number of months. It is the equal share if the loan is repaid in level installments.
Which rate should I enter?
The annual percentage from your own offer or a rate you want to test. Pricing depends on the lender and your credit.

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