Investment Calculator

Calculate how any investment grows over time with compound interest — enter the principal, annual rate, time and compounding frequency to see the future value.

What Does This Tool Do?

Calculate the future value of a lump-sum investment plus optional monthly contributions using compound interest. Shows total interest earned, total invested and overall return percentage.

Key Features

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Compound Interest
Handles annual, quarterly, monthly and daily compounding.
📅
Monthly Contributions
Add regular contributions to the base investment.
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Full Breakdown
Future value, interest earned, total invested, return %.
⚡
Instant
Results immediately.

How to Use

  1. Enter the initial investment amount.
  2. Enter the annual interest rate and investment period.
  3. Select compounding frequency and optionally add monthly contributions.
  4. Click Calculate to see the future value.

Frequently Asked Questions

What is compound interest?▾
Compound interest is interest calculated on both the initial principal and the accumulated interest. It grows exponentially: FV = P × (1 + r/n)^(n×t).
How much does compounding frequency matter?▾
More frequent compounding yields slightly more. $10,000 at 7% for 10 years: annual → $19,672; monthly → $20,097; daily → $20,137. The difference grows with time.
What is a realistic return rate?▾
US S&P 500 historical average: ~10% nominal, ~7% real (inflation-adjusted). Savings accounts: 1–5%. Bonds: 3–5%. Consult a financial advisor for personalised guidance.

Complete Guide to Investment Calculator

When To Use This Tool

Use Investment Calculator whenever you need fast, accurate output without installing software. This tool is designed for speed, clarity, and repeatable results for day-to-day work.

Best Practices for Accurate Results

  • Double-check the format of your input before running the tool.
  • Test with a small sample first, then process larger data.
  • Use Related Tools to verify, convert, or transform the output.

Why Users Prefer AdeDX

AdeDX tools are browser-based, free to use, and built to work across desktop and mobile devices. Most processing happens directly in your browser for fast performance and improved privacy.