Albert Einstein reportedly called compound interest the eighth wonder of the world. Whether or not he said it, the math is undeniable: money that earns returns on its returns grows exponentially over time. Our Compound Interest Calculator shows you exactly how powerful this force can be for your wealth.
What Is a Compound Interest Calculator?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods. Unlike simple interest, which only earns on the original amount, compound interest earns on a growing base resulting in exponential growth the longer it is left to work.
How It Works
Enter your starting amount, regular contribution, annual interest rate, compounding frequency, and time period. The calculator applies the compound interest formula to project your total balance. You can also see a breakdown showing how much of your final balance is principal, contributions, and earned interest.
How to Use This Calculator
• Enter your initial investment or starting balance.
• Add any regular monthly or annual contribution.
• Set the annual interest or return rate.
• Choose compounding frequency: monthly, quarterly, or annually.
• Set the investment period in years.
• View your projected final balance and interest earned.
Why Use This Calculator?
Seeing compound growth visually is one of the most convincing arguments for starting to save early. This calculator gives you a clear, honest picture of your financial future and helps you compare different savings and investment scenarios.
Frequently Asked Questions
What is the difference between simple and compound interest?
Simple interest is calculated only on the principal. Compound interest is calculated on the principal plus all previously earned interest, resulting in faster growth over time.
How does compounding frequency affect my returns?
The more frequently interest compounds, the more you earn. Monthly compounding produces slightly more than annual compounding at the same stated rate.
Is compound interest halal?
In Islamic finance, the concept of interest (riba) is prohibited. However, profit-sharing arrangements (mudarabah), equity investments, and Sukuk can generate similar compounding growth effects in a Sharia-compliant way.
What return rate is realistic?
For savings accounts in Saudi Arabia, 24% is typical. Islamic mutual funds and diversified equity portfolios have historically returned 610% annually over long periods.