Simple Interest Calculator

Calculate simple interest and the total amount from principal, annual rate and time.

%
years
Interest
2,100.00
Total amount
12,100.00
Interest per year
700.00

Formula

Interest = Principal × Rate × Time ÷ 100. Total = Principal + Interest.

About this calculator

Simple interest is charged only on the original principal, never on accumulated interest. It is used for some short-term loans, bonds and school problems.

Amounts are shown without a currency symbol, so the calculator works for any currency: enter all values in the same one.

Frequently asked questions

How do I enter months?

Convert to years: 6 months is 0.5, 9 months is 0.75, 18 months is 1.5.

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