Compound Interest Calculator

Your details

The starting balance you have today, before any interest or contributions.
The nominal yearly rate. The effective yearly yield (APY) is shown in the results.
%
Add any extra months on top of the whole years above.
How often interest is added to the balance. More often means slightly faster growth.
How much you add on a regular schedule. Set to 0 for a lump sum only.
How often you make the recurring deposit.
Start of period deposits earn one extra period of interest (an annuity due).
Step your deposit up by this percentage each year to model raises or stepped saving.
%
Currency
Future balance
$54,713.58
Total interest earned$20,714
Total deposited$34,000
Effective annual rate (APY)7.229%
Time to double (at this APY)9.9yr
If it were simple interest$17,000

Your money grows by about 61% beyond what you put in.

  • Compounding rewards time: the earlier you start, the more interest earns its own interest.
  • Your effective annual yield is about 7.23%, the real yearly growth after compounding.
  • Regular deposits often add more to the final balance than the starting deposit alone.

Next stepTry start of period deposits or an annual deposit increase under Advanced options to see the effect.

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