Compound Interest Calculator
Blue theme finance tool
Compound Interest Calculator
Calculate future value, total invested amount, interest earned, and growth from recurring contributions with a cleaner compound interest calculator built for long-term planning.
Investment details
Enter your starting amount, rate, time horizon, compounding schedule, and optional recurring contributions.
Your starting balance before any recurring contributions.
Nominal annual return before compounding is applied.
You can use whole years or decimals for shorter periods.
Used to convert the nominal annual rate into actual growth.
Optional extra amount invested regularly.
Used for recurring contribution growth.
Beginning-of-period contributions grow slightly more.
Only changes the wording of the result summary, not the math.
Live summary
Quick estimates update while you edit the inputs.
Future value $45,526.47
Total invested $34,000.00
Interest earned $11,526.47
Effective annual yield 7.23%
Note: recurring contributions are projected using the effective annual growth implied by your selected compounding frequency, so the estimate stays consistent even when contribution frequency differs.
Projected future value
$45,526.47
Your compound interest summary will appear here.
Long-term growth estimate
Total Invested $34,000.00
Total Interest Earned $11,526.47
Effective Annual Yield 7.23%
Years to Double 9.94 years
Initial Principal Growth $19,671.51
Contribution Future Value $25,854.96
Recurring Contributions Total $24,000.00
Average Monthly Invested $283.33
Future value breakdown
Initial principal share $10,000.00 • 22.0%
Added contributions share $24,000.00 • 52.7%
Interest share $11,526.47 • 25.3%
How to read this: future value combines your starting principal, all recurring contributions, and the compounding growth generated by the chosen rate and schedule.
