APY Calculator
Calculate apy from your own entered figures.
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Currency: Amounts are calculated in the currency you select; this site does not convert between currencies and does not use live exchange rates.
What this tool does
Calculate apy from your own entered figures. APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.
How to use the APY Calculator
- Enter or select nominal annual rate (%).
- Enter or select compounding periods per year.
- Enter or select principal for interest illustration.
- Read the calculated result; change any measurement to compare alternatives.
Formula
APY = (1 + r/n)^n − 1, where r is the nominal annual rate and n the compounding periods per year
- rate
- Nominal annual rate (%)
- compounds
- Compounding periods per year
- principal
- Principal for interest illustration
APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.
Worked example
For apy calculator, the following measurements illustrate the exact method: Nominal annual rate (%): 5; Compounding periods per year: 12; Principal for interest illustration: 10000.
Inputs
- Nominal annual rate (%)5
- Compounding periods per year12
- Principal for interest illustration10000
Result
- Annual percentage yield (APY)5.12%
- Interest on principal in one year$511.62
Results explained
- Annual percentage yield (APY)
- Annual percentage yield (APY) from the formula above. APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.
- Interest on principal in one year
- Interest on principal in one year from the formula above. APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.
Frequently asked questions
APY = (1 + r/n)^n − 1, where r is the nominal annual rate and n the compounding periods per year
APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.
No. All numbers are entered by you or come from the dated reference table shown on this page; calculations run locally.
This is an estimate, not financial, tax or legal advice. Verify the inputs and output with official sources and a qualified professional.
Check period consistency, currency, percentage inputs and the assumptions: APY assumes the rate and compounding frequency stay unchanged for a full year and interest is left to compound.