Compound Interest Calculator
Grow a balance over time with any compounding frequency and contributions.
%
yrs
Balance after 10 years
$54,713.58
$20,713.58 of that is interest
Total deposited
$34,000.00
Interest earned
$20,713.58
Growth
60.9%
ShowHide the working
- 1Compounding 12× per year at 7% gives a periodic rate of 0.00583333
- 2The starting $10,000.00 grows to $20,096.61
- 3$200.00/month for 120 months adds $34,616.96
- 4Final balance = $54,713.58
Formula
A = P(1 + r/n)^(nt) + PMT × ((1 + i)^m − 1) ÷ iYear by year
| Year | Deposited | Interest | Balance |
|---|---|---|---|
| 1 | $12,400.00 | $801.42 | $13,201.42 |
| 2 | $14,800.00 | $1,834.27 | $16,634.27 |
| 3 | $17,200.00 | $3,115.28 | $20,315.28 |
| 4 | $19,600.00 | $4,662.39 | $24,262.39 |
| 5 | $22,000.00 | $6,494.83 | $28,494.83 |
| 6 | $24,400.00 | $8,633.24 | $33,033.24 |
| 7 | $26,800.00 | $11,099.74 | $37,899.74 |
| 8 | $29,200.00 | $13,918.03 | $43,118.03 |
| 9 | $31,600.00 | $17,113.55 | $48,713.55 |
| 10 | $34,000.00 | $20,713.58 | $54,713.58 |
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About the Compound Interest Calculator
Grow a balance over time with any compounding frequency and contributions. It sits in the Finance & Loans section of NWS Calc, a free collection of calculators that run entirely in your browser. There is no signup, no paywall and no tracking — open the page, enter your numbers, get an answer.
Frequently asked questions
- Is the Compound Interest Calculator free to use?
- Yes. Every calculator on NWS Calc is completely free, with no signup, no usage limits and no ads.
- Does my data leave my device?
- No. The Compound Interest Calculator runs entirely in your browser using JavaScript. Nothing you type is uploaded, logged or stored on a server.
- Can I use the Compound Interest Calculator on my phone?
- Yes. The page is fully responsive and works in any modern mobile or desktop browser — there is nothing to install.
- What else is in Finance & Loans?
- Loans, mortgages, interest, savings and investment returns. You can browse the full Finance & Loans category for related calculators.