Calculator
Compound Growth Calculator
See how a starting amount and monthly contributions could grow over time.
Your numbers
Real returns vary year to year and can be negative.
Results
Hypothetical balance after 10 years
$10,664
Compounded monthly at a constant 7% a year
You contributed
$7,000
Hypothetical growth
$3,664
Growth share
34%
of the final balance
Show year-by-year tableHide table
| Year | Contributed | Growth | Balance |
|---|---|---|---|
| 1 | $1,600 | $92 | $1,692 |
| 2 | $2,200 | $234 | $2,434 |
| 3 | $2,800 | $429 | $3,229 |
| 4 | $3,400 | $683 | $4,083 |
| 5 | $4,000 | $997 | $4,997 |
| 6 | $4,600 | $1,378 | $5,978 |
| 7 | $5,200 | $1,830 | $7,030 |
| 8 | $5,800 | $2,358 | $8,158 |
| 9 | $6,400 | $2,967 | $9,367 |
| 10 | $7,000 | $3,664 | $10,664 |
Educational calculator, not financial advice. Results are hypothetical estimates based on the numbers you enter.
How this calculator works
- Your starting amount and monthly contributions grow at a constant hypothetical annual rate.
- Interest compounds monthly (the annual rate ÷ 12), and contributions are added at the end of each month.
- Growth = ending balance − everything you contributed.
- Real investments don't grow at a steady rate; returns can be negative in some years.