Compound Interest Calculator Online
This compound interest calculator estimates a maturity amount when interest is added back to the principal. Choose how many times interest compounds each year to match the product you are comparing.
How to use this calculator
This compound interest calculator estimates a maturity amount when interest is added back to the principal. Choose how many times interest compounds each year to match the product you are comparing. Results stay in your browser. They are estimates, not financial, tax or medical advice.
Frequently asked questions
What compounding frequencies can I use?
Enter compounds per year as a whole number, for example 1 (annual), 2 (half-yearly), 4 (quarterly) or 12 (monthly).
Are the results guaranteed?
No. The output is an estimate from the formula you entered, not a bank quotation.