About the Lump Sum Investment Calculator
Future value of a one-time lump sum investment compounded annually or monthly, with the total gain.
Also known as: one time investment, lumpsum calculator, single investment growth.
How to use this calculator
- Enter initial investment, expected annual return, years, compounding.
- 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 = 100,000
- Expected annual return = 12 %
- Years = 10
- Compounding: Monthly
the calculator returns:
- Future value: 330,038.69
- Total contributed: 100,000
- Total growth / interest: 230,038.69
- Growth as % of contributions: 230.04%