Compound Interest Calculator: Future Value and Growth
Regular contribution added each compounding period.
Result
Future value
$545,009.01
Total contributions
$300,000.00
Total growth
$245,009.01
This result is informational only and is not professional advice.
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Useful links
Project how money grows over time with compounding and optional regular contributions.
Estimate future value, contribution totals, and investment growth from starting amount, rate, years, and compounding frequency.
Use this calculator when you need a quick, practical estimate from starting amount, annual rate, years, and compounding frequency.
You get projected future value, total interest earned from compounding, and growth difference versus starting amount.
Primary assumption: Rate remains constant for the full period.
What this calculator shows
- Projected future value
- Total interest earned from compounding
- Growth difference versus starting amount
What to keep in mind
- Rate remains constant for the full period.
- No additional deposits or withdrawals are modeled.
- Compounding frequency remains unchanged across years.
FAQs
What is included in this estimate?
The calculator focuses on projected future value, total interest earned from compounding, and growth difference versus starting amount.
Can I compare multiple scenarios?
Yes. Change one input at a time and compare projected future value and total interest earned from compounding.
Can I treat this as a final legal or financial quote?
No. The model uses assumptions such as: Compounding frequency remains unchanged across years.
Does this include recurring monthly contributions?
No. This model focuses on principal-only compounding in the current version.
Worked example
Example: $10,000 at 8% for 20 years, monthly compounding
Input: Principal: $10,000; Rate: 8%; Years: 20; Compounding: 12/year
Output: Future value around $49,000+ depending on rounding.
Note: Use this for expectation ranges, then stress-test lower rate scenarios.