Frequently Asked Questions
Everything you need to know about compound interest and our calculator.
Frequently Asked Questions
Compound interest is the interest you earn on both your original money and on the interest you keep accumulating. It allows your wealth to grow faster over time compared to simple interest.
The formula is A = P(1 + r/n)^(nt), where A is the future value, P is the principal, r is the annual interest rate, n is the number of times interest is compounded per year, and t is the time in years.
The more frequently interest is compounded (e.g., daily vs. annually), the more money you will earn. This is because you are earning interest on your interest more often.
The Rule of 72 is a quick mental math shortcut to estimate how long it will take for your investment to double. Simply divide 72 by your annual interest rate.
This depends on your financial goals and budget. Even small, consistent monthly contributions can grow significantly over time due to the power of compound interest.
No, unless you are using a fixed-rate product like a CD or savings account. Investments in the stock market can fluctuate, so the interest rate is usually an estimated average over the long term.
Simple interest is calculated only on the principal amount. Compound interest is calculated on the principal amount and also on the accumulated interest of previous periods.
As early as possible! Time is the most important factor in compound interest. Starting early gives your money more time to grow exponentially.
Yes, inflation reduces the purchasing power of your money over time. To grow your real wealth, your compound interest rate needs to be higher than the inflation rate.
The results are estimates based on the parameters you provide. Actual returns may vary due to market fluctuations, fees, and taxes.