← Back to Calculators
Compound Interest Calculator
Investment Properties
%
years
How to Use
Compound Interest Calculations
Use the compound interest calculator to project investment growth over time with regular contributions.
How It Works
- Enter values: Fill in principal, rate, time, and compounding frequency
- Add contributions: Optional monthly additions to boost returns
- Choose frequency: How often interest compounds affects growth
- Get results: See projected growth with detailed breakdown
Compound Interest Formula: A = P(1 + r/n)^(nt)
- A: Final amount after interest
- P: Principal (initial investment)
- r: Annual interest rate (as decimal)
- n: Compounding frequency per year
- t: Time period in years
Investment Options by Return Rate
- 0-2%: High-yield savings, CDs, Treasury bonds
- 4-7%: Conservative mutual funds, bond funds
- 7-10%: Diversified stock funds, index funds
- 10-15%: Individual stocks, growth funds (higher risk)
Investment Examples
- Low Risk (0-2%): High-yield savings accounts, Certificates of deposit, Treasury bills, Money market accounts
- Medium Risk (4-7%): Bond index funds, Conservative balanced funds, Target-date funds, I Bonds
- High Risk (7-10%): S&P 500 index funds, Total stock market funds, Target-date funds, Balanced portfolios
- Very High Risk (10-15%): Growth stock funds, Small-cap funds, Individual stocks, Sector-specific ETFs
Try Sample Calculation
Click "Load Sample" to see compound growth with $10,000 principal + $1,000/month @ 7% for 10 years.
Want to Save Calculations?
Sign in to save your calculations and access them anytime!