APY Calculator | Convert APR to APY & Compare

Convert APR to Annual Percentage Yield (APY) for any compounding frequency

Project savings growth over multiple years and compare competing savings account...

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 up to three APR and compounding combinations side by side. The calculator converts each to APY, projects growth over your chosen time period, and shows how much more or less each account earns.

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 year-by-year balance projections including the exact interest earned each year.

Can I export my APY Calculator calculations?

Yes! In guest mode, you can export your calculations to JSON format. Sign in is required for PDF and CSV export. Click the export button to download your results. This is perfect for record-keeping, sharing with others, or importing into other tools.

Does this calculator save my history?

Yes! Your calculation history is automatically saved. Guest users can save up to 50 calculations per workspace locally. Sign in for free to save up to 100 calculations per workspace, with access from any device when logged in.

Is this calculator free to use?

Absolutely! The APY Calculator is completely free with no sign-up required. Create a free account to unlock additional features like more calculation history, multiple workspaces, and the ability to access your saved data from any device.

Related Calculators:

Savings Calculator- Calculate how your savings grow with compound interest
Investment Calculator- Calculate how investments grow over time with regular contributions
Present Value Calculator- Calculate the present value of future cash flows using the Time Value of Money

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