What compounding frequencies are supported?

Annually, semiannually, quarterly, monthly, and daily.

Can I include regular contributions?

Yes, set an extra contribution amount added at every compounding period.

Is this financial advice?

No, it's an educational estimator only.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

Compound Interest Calculator

Project investment growth with compounding and recurring contributions.

Support

Works Offline

Privacy First

No Login

No API

Investment details

Principal

Annual rate (%)

Years

Compounding

Extra contribution per period

Result

Final balance

16470.09

Total contributed

10000.00

Interest earned

6470.09

About the Compound Interest Calculator

Calculate how an investment grows over time with compound interest, adjustable compounding frequency, and optional recurring contributions per period.

Examples

$10,000 at 5% for 10 years

P=10000, r=5%, t=10y, monthly

Output

≈ $16,470

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-07 · Runs entirely in your browser