Compound Interest Calculator
Project compound interest growth on savings.
Recommended next steps
Related tools
Project savings growth with regular contributions.
Compute simple interest on a principal over time.
Project return on a certificate of deposit.
Frequently asked questions
It is the number of times per year interest is added back to the balance. Use 1 for annual, 4 for quarterly, 12 for monthly, or 365 for daily compounding. The more frequent the compounding, the slightly higher the final amount.
No — it projects a single lump sum. If you want to add monthly contributions, use the savings calculator, which assumes monthly compounding with regular deposits.
Not exactly. APY already bakes the compounding frequency into one number; this calculator lets you separate the nominal rate from the compounding frequency. For a CD quoted in APY, use the CD calculator instead.
Last updated 2026-06-03.