Compound Interest Calculator
Forecast investment growth over time with monthly additions and multiple compounding options, visualized with responsive charts.
Interactive Tool Workspace
100% Client-Side ProcessingInvestment Variables
Total Balance$0
Contributions$0
Interest Earned$0
Loading charts...
How to use Compound Interest Calculator
- Set principal: Define your initial lump-sum starting investment.
- Add contributions: Input your monthly saving deposits.
- Define rates: Input your expected average annual interest rate percentage.
- Duration: Set growth years to calculate and compile.
- Analyze graph: Hover over the timeline area chart to check yearly interest vs contribution proportions.
Frequently Asked Questions
Q: What is compounding frequency?
It's the interval that accumulated interest is calculated and added back to your principal. Compounding monthly generates slightly higher returns than compounding annually because your interest earns interest sooner.
Q: Is this calculator accurate?
Yes, it uses the standard financial equation for compounding interest with recurring annuity deposits, assuming a fixed rate of return.