justyourcalculatorInvestment Calculator
Project your investment, or find the deposit, return or time a goal needs.
- 100% Free
- Instant Results
- No Sign Up
Investment Calculator
Grow an investment, or solve for rate, time or deposit
End balance
$198,290.40
after 10 years
- Starting amount
- $20,000.00
- Total contributions
- $120,000.00
- Total interest
- $58,290.40
- End balance
- $198,290.40
- Return rate
- 6%, compounded annually
Contributions are made at the end of each month. Returns are assumed constant; real markets vary. Estimates for planning only, not financial advice.
- Starting amount$20,000
- Contributions$120,000
- Interest$58,290
- Starting amount
- Contributions
- Interest
| Year | Deposits | Interest | Ending balance |
|---|---|---|---|
| 1 | $12,000.00 | $1,526.53 | $33,526.53 |
| 2 | $12,000.00 | $2,338.12 | $47,864.65 |
| 3 | $12,000.00 | $3,198.41 | $63,063.06 |
| 4 | $12,000.00 | $4,110.31 | $79,173.37 |
| 5 | $12,000.00 | $5,076.93 | $96,250.30 |
| 6 | $12,000.00 | $6,101.55 | $114,351.84 |
| 7 | $12,000.00 | $7,187.64 | $133,539.48 |
| 8 | $12,000.00 | $8,338.90 | $153,878.38 |
| 9 | $12,000.00 | $9,559.23 | $175,437.61 |
| 10 | $12,000.00 | $10,852.79 | $198,290.40 |
More Financial Calculators
View all calculators- Compound Interest CalculatorGrow a balance, or convert between compounding periods
- Savings CalculatorHow your savings grow with deposits and interest
- Retirement CalculatorHow much you need, how to save and what you can spend
- Average Return CalculatorArithmetic vs geometric average return and CAGR
- Future Value CalculatorWhat a sum and regular payments grow to
- Mortgage CalculatorMonthly payment with taxes, insurance and PMI
- Loan CalculatorPayments for amortized, deferred and bond-type loans
- Auto Loan CalculatorCar payment with tax, fees, trade-in and rebates
- Income Tax CalculatorYour 2026 US federal income tax, refund or amount owed
- Calculators
- 204+
- Free to use
- 100%
- Results as you type
- Instant
How the investment calculator works
Each period your balance earns the return rate, and your contribution is added at the start or end of the period. The rate you enter is a yearly rate compounded as you choose; we convert it to the matching rate per contribution period.
The other tabs solve the same equation for a different unknown: how much to contribute, what return you need, how much to start with, or how long it takes to reach your target.
Results assume a constant return, no taxes and no fees. Real returns vary year to year, so treat the answer as a planning estimate.
Using and checking your result
Published by JustYourCalculator. Check the units and assumptions above, and compare a known example before relying on the output. Calculations use browser arithmetic and may round displayed values.
This is an educational estimate, not a lender quote, tax filing calculation or investment recommendation. Actual costs depend on current rules, fees and your circumstances. Verify important decisions with official sources and a qualified adviser.
Share links may contain your input values. Anyone with the URL can read them; avoid sharing sensitive personal or financial information.