APY to APR Converter Calculator
Convert any bank's APY into its true APR to understand how compounding affects your savings or loan rate.
Quick answer: Convert a bank's APY (annual percentage yield) into its underlying APR (annual percentage rate) and see why the two numbers diverge. Enter APY (Annual Percentage Yield) and Compounding Periods Per Year to personalize the estimate. It returns Equivalent APR, APY − APR Spread, and Monthly Periodic Rate so you can compare the impact before choosing a next step. Use it to compare cash flow, interest, liquidity, and next-account choices before moving money.
A 4.50% APY compounding 365 times a year is equivalent to a 4.40% APR.
The 0.10% gap is entirely the effect of compounding. Always compare accounts by APY, not the advertised rate.
Compare today's top APYsCompare high-yield savings rates
- 1
Set the target and timeline for this plan
Convert a bank's APY (annual percentage yield) into its underlying APR (annual percentage rate) and see why the two numbers diverge.
- 2
Pressure-test one alternate scenario before deciding
Assumptions change the answer, especially when rates, taxes, or timing matter.
- 3
Save the result to Money Map or use the linked next action
Turn the result into a prioritized action instead of treating it as a one-off number.
This is an educational estimate, not tax, legal, investment, or lending advice. Confirm with a qualified professional or the provider before acting.
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Reviewed Sep 22, 2026 · Methodology
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Everything you need to know.
What does an example APY to APR Converter calculation look like?
Why is APY always higher than APR?
Does compounding frequency really matter?
Is the APY to APR Converter Calculator free to use?
Does using the APY to APR Converter Calculator affect my credit score?
Are the results personalized financial advice?
What should I do after seeing the result?
How does SwitchWize choose related offers?
How fresh are the rates and offers shown?
Where can I see the ranking methodology?
Can Money Map use this result?
Why This Matters
Banks advertise APY because compounding makes it look higher than the actual APR they're charging or crediting. APR is the simple annual rate before compounding kicks in, while APY accounts for how often interest is calculated and added back into your balance. Knowing both numbers helps you compare offers fairly and understand exactly how much your money grows or how much you owe.
How to Use It
- 1Enter the APY (annual percentage yield) the bank quoted you.
- 2Select how many times per year interest is compounded: daily, monthly, quarterly, or annually.
- 3Review the equivalent APR, the spread between APY and APR, and the monthly periodic rate in the results.
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