Compound Interest - Free Online | ToolXHub
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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 term, annual compound interest multiple (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 an additional fixed investment amount per month or year.
The interest-free formula: A = P (1 + r/n)^(nt), where P is the principal, r is the annual interest rate, n is the interest-free number per year, and t is the number of years. The higher the frequency of interest-free payments, the greater the final benefit (because interest also generates interest).
The formula for fixed investment addition is relatively complex, and the tool will calculate it period by period. You can compare the difference between simple interest and compound interest. The longer it goes, the greater the difference. Ideal for planning long-term financial goals such as savings, investments and pensions.
The interest-free calculator inputs the principal, annual interest rate, investment term and interest-free frequency to calculate the final income and the total amount of principal and interest, and supports the increase of fixed investment.