Simple Interest Calculator

Work out simple interest on a loan or a deposit.

Enter the amount, the yearly rate and the time.

Details

Calculated in your browser. Your numbers are not sent or saved.
Guide

How to calculate simple interest

1

Enter the amount

The money borrowed or saved.

2

Enter the rate and time

The yearly rate, and the time in years or months.

3

Read the interest

See the interest and the total.

Frequently asked questions

What is the formula?

Interest = amount × rate × time ÷ 100, with the time in years.

What is the difference from compound interest?

With simple interest, the interest is always worked out on the original amount only. Compound interest is also worked out on interest already earned.

Can I enter months?

Yes. Switch the time to months and it is divided by 12 for you.

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