Calculator
Compound Interest Calculator
Enter a starting amount, a yearly rate, and a number of years. Add a monthly amount when you save regularly.
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How to calculate compound interest
- Enter the starting amount and the yearly rate.
- Enter the number of years. Add a monthly amount when you put money in each month.
- Click Calculate and read the balance and the interest.
Interest is compounded every month. 1000 at 5% for 2 years, with nothing added, grows to 1104.94. A rate of zero keeps the starting amount and adds the monthly payments.
Frequently asked questions
Is the rate yearly or monthly?
Enter the yearly rate. The calculator divides it by 12 and compounds it once a month.
Are the numbers uploaded?
No. The calculation runs in your browser.
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