Savings & Interest
APY Calculator
Convert any APR to its true Annual Percentage Yield (APY) by selecting the compounding frequency, and see actual interest earned on your principal.
Compounding Frequency
🔒 All calculations happen instantly in your browser. No data is sent to any server.
How the APY Calculator Works
APY = (1 + APR/n)ⁿ − 1
Where n = number of compounding periods per year (365 for daily, 12 for monthly, etc.)
Example: 5% APR compounded monthly → APY = (1 + 0.05/12)¹² − 1 = 5.1162%
5% APR compounded daily → APY = (1 + 0.05/365)³⁶⁵ − 1 = 5.1267%
APY Calculator Insights & Strategic Planning
Good estimates help you plan your money with confidence. Use the numbers from the APY Calculator to set realistic goals, cut extra costs, and make smart financial decisions.
Planning Ahead
Small changes add up fast over time. Checking your numbers often helps you stay on track and build strong savings habits.
Smart Budgeting
Always pair your calculations with real daily spending needs. Keeping an emergency fund gives you peace of mind and flexibility.
APY Calculator Frequently Asked Questions
What is the difference between APR and APY?
APR is the stated annual rate without compounding. APY accounts for compounding, interest earned on interest. APY is always ≥ APR. When comparing savings accounts, use APY. When comparing loans (where APR understates the cost), also prefer APY.
Why do banks advertise APY for savings and APR for loans?
Because APY > APR when compounding occurs, banks advertise APY on savings accounts to show a higher number, and APR on loans to show a lower number. Both are legally required disclosures, but always convert to the same metric when comparing.
How much does compounding frequency matter in practice?
For most savings products, the difference between daily and monthly compounding is small. At 5% APR: monthly APY = 5.1162%; daily APY = 5.1267%. The difference grows with higher rates and longer time periods but is rarely the deciding factor.
What is the effective annual rate (EAR)?
EAR is another name for APY, the true annual return accounting for compounding. The formula is identical: EAR = (1 + r/n)ⁿ − 1. Finance textbooks use EAR; banking regulators in the US use APY.
How do I compare two savings accounts with different APYs?
Simply compare APYs directly, the higher APY account earns more, regardless of how the rate is compounded. APY is standardised for comparison. For identical APYs, check for fees, minimum balance requirements, and withdrawal restrictions.
Are the numbers I enter into this calculator saved or tracked?
No. Every calculation runs right inside your browser using local code. Your salary, debts, and loan numbers stay completely private. Nothing is ever saved or sent to any server.
How should I account for taxes, inflation, and unexpected fees?
Most formulas show baseline estimates. In real life, keep local taxes, inflation, and bank fees in mind so your budget matches your actual costs.
Financial Calculation Disclaimer
The results from the APY Calculator are for general informational and educational use only. They are based on standard mathematical formulas and the numbers you enter.
BeYourTools is not a bank, lender, or financial advisor. This tool does not provide official tax or legal advice. Real rates and fees depend on your lender and local rules. For major financial decisions, please speak with a qualified professional. Read our complete Financial & Legal Disclaimer.