Compound Interest Calculator
Estimate compound growth with optional recurring contributions.
About this calculator
Use this calculator to estimate compound growth with regular contributions.
How to use
- Enter the starting principal and rate.
- Set the compounding frequency and optional contribution.
- Read the final balance and total interest.
Formula
Future value grows by compound periods, with contributions added at the end of each period.
Example
1,000 at 5% for 1 year compounded yearly → 1,050.
FAQ
Are contributions added at the start or end of each period?
This calculator treats contributions as end-of-period payments.
Does monthly contribution work with yearly compounding?
Monthly is supported as a recurring input, but the calculation stays consistent with the selected compounding frequency.
Related calculators
Results are for informational purposes only. Verify important calculations independently.