Free Finance Calculators

Every calculator is free, instant, and requires no account. Built for US investors and savers.

Compound Interest Calculator

See how your money grows over time with compound interest. Enter a principal, rate, and time to calculate your final balance.

Calculate return on investment (ROI) and compound annual growth rate (CAGR) for any investment.

Find out how much you need to save each month to reach your financial goal on time.

See how inflation erodes your money's purchasing power over time and how much you'll need in the future.

Quickly estimate how long it takes to double your investment using the Rule of 72 formula.