Future Value Calculator

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Calculate how much any investment will be worth in the future. Enter your starting amount, expected interest rate, time horizon, and optional regular contributions to see the full growth projection with a year by year breakdown.

How to Use

01

Enter your initial investment amount (or leave at 0 if you only plan regular contributions).

02

Set the annual interest rate and choose a compounding frequency.

03

Enter the number of years for the investment horizon.

04

Optionally add a regular contribution amount and its frequency.

05

Results, chart, and year by year table appear automatically as you type.

How the Future Value Formula Works

The future value formula computes how much money grows when interest is compounded regularly. The lump sum component is FV = PV multiplied by (1 + r)^n, where PV is your starting balance, r is the interest rate per compounding period (annual rate divided by periods per year divided by 100), and n is the total number of compounding periods (years times periods per year). When you add regular contributions, an annuity component is added: PMT multiplied by [((1 + r)^n minus 1) / r], where PMT is the contribution per compounding period. The two components are summed to give the total future value. Compounding frequency matters because monthly compounding at 7% annual grows faster than annual compounding at the same rate, since interest earns interest more frequently throughout the year.

Step by Step Example

  1. Initial investment: 5,000 | Annual rate: 8% | Time: 10 years | Compounding: Monthly | Contribution: 100/month
  2. Rate per period r = 8 / 12 / 100 = 0.006667 | Total periods n = 10 x 12 = 120
  3. Lump sum FV = 5,000 x (1.006667)^120 = 5,000 x 2.2196 = 11,098
  4. Annuity FV = 100 x [(2.2196 minus 1) / 0.006667] = 100 x 182.95 = 18,295
  5. Total FV = 11,098 + 18,295 = 29,393 | Total invested = 5,000 + (100 x 120) = 17,000
  6. Total growth = 29,393 minus 17,000 = 12,393 | Growth multiple = 29,393 / 17,000 = 1.73x

When to Use This Calculator

  • Projecting how a savings account or investment portfolio will grow over time
  • Comparing different compounding frequencies to find the most effective schedule
  • Planning retirement savings by modeling regular contributions over many years
  • Evaluating the impact of starting earlier versus later on the final balance
  • Understanding how different interest rates affect long term growth
  • Estimating how much to invest now to reach a specific financial goal

Important Note

This calculator assumes a constant annual interest rate for the entire period. Real world investments fluctuate and do not guarantee any fixed return. Results are for educational and planning purposes only. Tax implications, inflation, management fees, and market volatility are not accounted for. Consult a qualified financial advisor before making investment decisions.

Compounding Frequency: Does It Matter?

Monthly compounding grows faster than annual at the same nominal interest rate
Starting contributions earlier consistently outperforms starting later with larger amounts
Regular contributions amplify compounding significantly over long time horizons
Higher compounding frequency cannot compensate for a substantially lower interest rate
Inflation and taxes reduce effective returns and are not reflected in nominal FV results
A projected rate assumes consistent returns that real investments rarely deliver

Key Features

Flexible Compounding

Choose annual, semi annual, quarterly, or monthly compounding to match your actual investment terms.

Regular Contributions

Model recurring deposits at any frequency to see how consistent saving accelerates growth.

Year by Year Table

Full breakdown showing future value, total invested, and growth at each year.

Visual Growth Chart

Line chart comparing your total invested against the compounded future value over time.