Long-term growth
Compound interest calculator
See the projected balance split between the money you add and the growth that money may earn over time.
Time does more of the work later
Compounding means earlier growth can earn additional growth. The effect is modest at first and becomes more visible over longer periods.
The projection assumes the return arrives smoothly each month. Real investments move unevenly, may lose value and include taxes or fees.
When are contributions added?
The tool assumes each monthly contribution is added at the end of the month.
Is the annual return guaranteed?
No. It is an assumption for planning; actual returns can be higher, lower or negative.
Keep planning
More finance calculators
01 Mortgage PITI & loan type calculator Compare conventional, FHA, VA, USDA, jumbo and adjustable-rate loans with a state-aware monthly payment breakdown. 02 Hourly wage & paycheck calculator Estimate gross and take-home pay from an hourly wage or annual salary, your work schedule, pay frequency and state. 03 Federal income tax calculator Estimate ordinary federal income tax using 2026 brackets and the standard deduction for single or married-joint filers. 04 Car payment calculator Estimate the payment, amount financed and all-in vehicle cost before discussing monthly numbers with a dealer. 05 Loan payment calculator Compare a fixed monthly payment with the full interest and fee cost before you borrow. 06 Compound interest calculator See the projected balance split between the money you add and the growth that money may earn over time. 07 401(k) & retirement savings calculator Project your 401(k) and retirement savings, contributions and future income. 08 Investment return calculator Measure a completed investment using its change in value, income received, fees and holding period. 09 Inflation calculator See what today’s purchase could cost later and how much buying power the same number of dollars may retain. 10 Debt payoff calculator See the estimated payoff date in months, interest cost, and the time an extra monthly payment may save. 11 How much house can I afford? Turn your income and monthly debts into a home-price planning budget, then see how down payment, rates and local costs change it. 12 Savings goal calculator See how long it could take to reach a savings target, and compare monthly contributions side by side. 13 Regular calculator Work out everyday arithmetic, percentages and quick calculations. 14 Scientific calculator Calculate powers, roots, logarithms and trigonometry in degrees or radians. 15 Real estate finance calculator Independent web tool inspired by the Qualifier Plus IIIx 3415: loans, qualifying and property costs. 16 Social Security retirement calculator Compare estimated U.S. benefits at early, full and delayed retirement ages.