About the Compound Investment Calculator
Compound an investment with your chosen compounding frequency and regular additions to see its future value.
Also known as: compound growth investment, compounding investment.
How to use this calculator
- Enter initial investment, monthly contribution, expected annual return, years and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
FV = P(1 + r)ⁿ + PMT·((1 + r)ⁿ − 1)/r (monthly periods)
- P
- = initial amount
- PMT
- = monthly contribution
- r
- = monthly rate
- n
- = months
Worked example
Using the values pre-filled in the calculator above:
- Initial investment = 50,000
- Monthly contribution = 250
- Expected annual return = 7.5 %
- Years = 15
- Compounding: Monthly
the calculator returns:
- Future value: 236,250.66
- Total contributed: 95,000
- Total growth / interest: 141,250.66
- Growth as % of contributions: 148.68%