Future Value Calculator
Visualize the long-term potential of your savings and investments.
Future Value Calculator
Wondering what your savings or investment will be worth in 10, 20, or 30 years? This future value calculator shows you the end result of starting with a lump sum, making regular contributions, and letting compound growth do its work.
What Is Future Value?
Future Value (FV) is the value of a current asset at a specific future date, given an assumed rate of growth. It's the flip side of present value — instead of discounting back, you're projecting forward.
How to Use This Calculator
- Enter the initial amount (starting lump sum, or $0 if starting from scratch).
- Enter your regular contribution (monthly or annually, or $0).
- Enter the annual interest/growth rate.
- Enter the number of years.
- Select the compounding frequency.
- Click Calculate to see your future balance and a year-by-year growth table.
Future Value Formulas
Lump sum only: FV = PV × (1 + r/n)^(n×t)
With regular contributions: FV = PV(1 + r/n)^(nt) + PMT × [(1 + r/n)^(nt) − 1] ÷ (r/n)
Example Calculation
Start: $10,000 | Monthly contribution: $400 | Rate: 8% | Term: 20 years
- Total contributed: $10,000 + $96,000 = $106,000
- Future value: ≈ $284,000
- Growth from compounding alone: ≈ $178,000
Common Mistakes to Avoid
- Using optimistic return rates — The difference between 8% and 10% seems small but produces dramatically different outcomes over 30 years. Use conservative estimates.
- Not adjusting for inflation — Subtract 3% from your nominal return for an inflation-adjusted future value (real purchasing power).
- Starting one contribution period late — Contributing for 30 years vs. 29 years can mean $20,000–$50,000+ at the end due to compounding on the final year.
Frequently Asked Questions
How much will $100,000 be worth in 20 years?
At 7% annual growth (S&P 500 inflation-adjusted average): $100,000 × (1.07)^20 ≈ $386,968. At 5%: $265,330. At 10%: $672,750.
What is the Rule of 72?
Divide 72 by the annual return rate to estimate doubling time. At 8%: doubles every 9 years. $10,000 → $20,000 → $40,000 → $80,000 → $160,000 over 36 years.
Can I use this to plan for retirement?
Yes — it's a great starting point. For more detailed retirement planning, use our Retirement Calculator which factors in income needs, Social Security, and withdrawal strategies.
How do taxes affect future value?
In a taxable account, dividends and gains are taxed annually, reducing the effective growth rate. Tax-advantaged accounts (Roth IRA, 401k) protect growth — which is why maximizing these first matters so much.
Conclusion
The future value calculation is one of the most motivating exercises in personal finance. Seeing exactly what regular investing compounds into over 20–30 years can change your financial behavior today. Run the numbers — then act on them.
Related: Present Value Calculator | Investment Calculator | Retirement Calculator | Compound Interest Calculator
Expert Advice
The "Rule of 72" states that dividing 72 by your annual interest rate gives you the approximate years to double your money. At 8%, your money doubles every 9 years.
