Compound Interest - Free Online | FunToolX
Use Compound Interest online for free, no download required. FunToolX offers hundreds of fun online tools.
For reference only, not investment advice. Actual returns may vary due to taxes and other factors.
About this tool
Compound Interest is a free online math tool. Calculate compound interest growth with charts. Solve calculations and learn with ease. It runs entirely in your browser — no download or sign-up needed.
Enter the initial principal, annual interest rate, investment period, annual compound interest times (annual compound interest, monthly compound interest, daily compound interest, etc.), and the tool calculates the final total principal and interest and interest income. You can set a monthly or annual additional fixed investment amount.
Compound interest formula: A = P(1 + r/n)^(nt), where P is principal, r is annual interest rate, n is the number of compound interest per year, and t is the number of years. The higher the frequency of compound interest, the more the final benefit (because interest also generates interest).
The formula for fixed investment addition is more complex, and the tool will calculate it period by period. You can compare the difference between simple interest and compound interest-the longer the time goes, the greater the difference. Suitable for planning long-term financial goals such as savings, investment, and pensions.
Compound interest calculator, which inputs principal, annual interest rate, investment period and compound interest frequency, calculates final income and total principal and interest, and supports fixed investment additions.