Test your knowledge of compound interest, the Rule of 72, and related investing concepts in our most popular investing quiz! There’s a trick question – can you spot it?

Dec 2, 2025 · If you'd prefer not to do the math manually, you can use the compound interest calculator at the top of our page. Simply enter your principal amount, interest rate, …

See How Finance Works for the compound interest formula, (or the advanced formula with annual additions), as well as a calculator for periodic and continuous compounding.

Free compound interest calculator to find the interest, final balance, and schedule using either a fixed initial investment and/or periodic contributions.

Use our compound interest calculator to see how your savings can grow over time. Calculate returns with different contribution amounts, interest rates, and compounding frequencies.

Compounding interest calculator: Use this calculator to determine how much your money can grow with compound interest.

Discover the power of compound interest with our calculator. Estimate your investment growth over time and learn how it works.

Use this calculator to easily calculate the compound interest and the total future value of a deposit based on an initial principal. Allows adding money into the deposit, as well as calculating daily, …

Free online compound interest calculator to plan your retirement savings, mortgage payoff, and education funds. Visual charts, examples, and no ads.

Easily calculate compound interest with our modern financial calculator. Includes goal tracking, investment projections, and currency support. Perfect for saving and investing smarter.