Everyday
Interest Earned Calculator
Calculate the interest earned on a principal balance with compound interest.
- Free to use
- Runs in your browser
- Level A · Standard formula
- Last reviewed 2026-08-16
Calculator guide
How to use the Interest Earned Calculator
Calculate the interest earned on a principal balance with compound interest. Enter the requested values and select Calculate. The result and supporting values are produced locally in your browser.
Formula
Worked example
$10,000 at 5% compounded monthly for 5 years earns about $2,833.59 in interest.
What to keep in mind
- This assumes a constant nominal annual rate with no deposits or withdrawals.
- Taxes, fees, and changing rates are not included.
Methodology
This calculator uses deterministic arithmetic and performs the calculation locally in your browser. Verify assumptions, units, and source values for your specific use case.
Review standard: Level A · Standard formula. How calculator reviews work.
Frequently asked questions
What does this calculator calculate?
Calculate the interest earned on a principal balance with compound interest.
How is the result calculated?
Interest Earned = P × (1 + r ÷ n)^(n × t) − P.
Can I use the result for an important decision?
Use the result as a calculation aid and verify the inputs, assumptions, and applicable professional or regulatory requirements before relying on it for an important decision.
Does CalculateMeasure store the values I enter?
The calculator performs its arithmetic in your browser. The calculator itself does not need to send your entered values to a server to produce the result.