Enter your initial investment amount
Set annual interest rate and compound frequency
Optionally add monthly contributions
Click Calculate to see growth over time
See how much a savings account balance grows over 5, 10, or 20 years at a given interest rate.
Estimate the future value of an investment assuming a fixed annual return rate compounded over time.
Project the growth of retirement savings to understand if your current savings rate will meet your goals.
See the difference in final balance between monthly vs. daily vs. annual compounding for the same rate.
Students and learners can visualize how compound interest accelerates over long time periods.
A = P(1 + r/n)^(nt), where A is the final amount, P is principal, r is annual rate, n is compounding frequency per year, and t is time in years.
Simple interest is calculated only on the principal. Compound interest is calculated on the principal plus accumulated interest, causing exponential growth.
This tool calculates compound interest on a single initial deposit. For recurring contributions, use a dedicated savings calculator.
No. All calculations are performed in your browser.
Daily compounding yields the highest returns for the same annual rate, though the difference between daily and monthly is small for typical rates.