APY Calculator — Convert APR to APY & Compare Rates
Find the real annual percentage yield on any savings account or CD
Convert APR to APY for daily, monthly, or quarterly compounding and compare rates side...
When Should You Use This Calculator?
- Compare different savings accounts or investment products based on their true annual yield
- Understand the impact of compounding frequency on your returns (daily, monthly, quarterly)
- Project principal growth over multi-year horizons using Growth mode
- Compare two APR/compounding offers side-by-side in Compare mode
- Make informed financial decisions by comparing APR vs APY side-by-side
Key Features:
- Compare multiple scenarios side-by-side
- Three modes: Simple conversion, Growth projection, and Offer comparison
- APY calculation from APR with daily to annual compounding support
- One-year and multi-year principal growth projections
- Side-by-side offer comparison with APY delta and better-offer signal
Frequently Asked Questions
What is APY and how is it different from APR?
APR (Annual Percentage Rate) is the nominal interest rate without compounding. APY (Annual Percentage Yield) includes the effect of compound interest and shows your true annual return. A savings account with 5% APR compounded monthly has an APY of 5.12%, meaning you actually earn slightly more.
How do I calculate APY from APR?
APY = (1 + APR / n)^n - 1, where n is the number of compounding periods per year. For monthly compounding, n=12. For daily compounding, n=365. Enter the APR and compounding frequency in this calculator to get the APY instantly.
How do I compare savings account APY offers?
Use Compare mode to enter two APR and compounding combinations side by side. The calculator converts each to APY and shows which one earns more and by how much.
Can I project how much my savings will grow with a given APY?
Yes. Enter your starting balance and APY, then set a time horizon (1-30 years). Growth mode shows the total interest earned and final balance at the end of that period.
Can I export my APY Calculator calculations?
Yes. In guest mode you can export your calculations to JSON. Signing in adds PDF and CSV export. Click the export button to download your results — useful for record-keeping, sharing, or importing into other tools.
Does this calculator save my history?
Yes. Your calculation history is saved automatically. As a guest you can keep up to 50 calculations per workspace on your device. Sign in for free to keep up to 100 per workspace and access them from any device.
Is this calculator free to use?
Yes. The APY Calculator is free to use with no sign-up required. A free account adds more calculation history, multiple workspaces, and access to your saved data from any device.
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