Future Value Calculator
Calculate the future value of a starting amount plus regular contributions, compounded at any rate over any time period.
How to use the Future Value Calculator
- Enter your inputs into the Future Value Calculator above.
- Results update instantly as you type — no submit button needed.
- Adjust any value to see how the result changes in real time.
The future value formula
FV = PV(1 + r)^n + PMT · [((1 + r)^n − 1) / r]
PV is the present value (starting balance), r is the periodic rate, n is the number of periods, PMT is the periodic contribution. Same identity used in retirement and savings projections.
Worked example
$5,000 starting balance with $200/month contributions over 25 years at 6% annual return (monthly compounding): FV ≈ $151,150. Total contributed: $5,000 + $60,000 = $65,000. Growth: $86,150.
Frequently asked questions
Should I use a real or nominal return?
For long-term planning in today's purchasing power, subtract expected inflation from your nominal return. For a stated dollar goal in the future, use nominal.
Does the timing of contributions matter?
Slightly. Annuity-due (contributions at start of period) produces about 1×r more than ordinary annuity at the same parameters because each contribution earns one extra period.
Why doesn't doubling my contribution double the result?
It nearly does, but the existing balance also keeps compounding. The contribution part of FV doubles; the PV-growth part stays the same — so total FV grows proportional to (PV + 2×PMT contribution share).