--- title: "APY Calculator: Free Online Tool with Guide & FAQs | ShoutingNow" description: Convert between APR and APY, model future value from an initial deposit and optional regular contributions, and review total interest, rate of return. url: "https://shoutingnow.com/tools/apy-calculator/" image: "https://shoutingnow.com/wp-content/uploads/2026/07/shoutingnow-preview-scaled.webp" --- # APY Calculator Convert between APR and APY, model future value from an initial deposit plus optional regular contributions, and check total interest, rate of return, and how long it takes to double your money. ## How to use this APY calculator 1. Pick a currency symbol for display. 2. Enter your initial deposit and either APR or APY. The other field fills in automatically based on your compounding interval. 3. Set the duration in years and months, and choose how often interest compounds. 4. If it applies, add regular deposits at a weekly, monthly, quarterly, half-yearly, or yearly frequency. 5. Click Calculate and future value, interest earned, APR-to-APY conversion, rate of return, doubling time, and breakdown tables all show up on the right. Modeling a money market account where APY is the quoted rate? Use the [Money Market Account Calculator](https://shoutingnow.com/tools/money-market-account-calculator/). Want full contribution controls and charts? See the [Compound Interest Calculator](https://shoutingnow.com/tools/compound-interest-calculator/). ## What is APY? **Annual Percentage Yield (APY)**, sometimes called the effective annual rate, is the total return a savings or investment account earns over one year, including the effect of compounding. Unlike nominal APR, APY accounts for interest earned on both principal and whatever interest has already accumulated, which is why it is the standard metric people use to compare deposit products. ### APY from APR To convert a nominal APR to APY, raise one plus the periodic rate to the power of compounding periods per year, then subtract one: **r = nominal APR (decimal), n = compounding periods per year** ### Worked example Take $100 at 5% APR compounded monthly for 1 year: - APY ≈ 5.12% - Future value ≈ $105.12 - Total interest ≈ $5.12 - Time to double ≈ 13 years, 11 months at this rate ### APY vs APR **APR** is the advertised nominal rate before compounding frequency gets applied. **APY** always comes out equal to or higher than APR whenever interest compounds more than once a year. Two accounts can share the same APR but land on different APYs if their compounding intervals differ, since more frequent compounding pushes the effective return higher. ## Examples and use cases ### Real-world use cases - High-yield savings hunt: A saver converts two banks’ quoted APR figures, one compounding daily and one monthly, to APY before opening an account. - CD comparison: Someone checks whether a 5.0% APR CD compounded quarterly actually beats a 5.05% APY product advertised directly. - Emergency fund projection: A user models $10,000 at the calculated APY for one year to estimate interest without doing the exponent math by hand. ### Related tools For interest without any compounding, use the [Simple Interest Calculator](https://shoutingnow.com/tools/simple-interest-calculator/). For MMA-specific projections, try the [MMA Calculator](https://shoutingnow.com/tools/money-market-account-calculator/). For fixed-term CD growth with tax and schedules, use the [CD Calculator](https://shoutingnow.com/tools/cd-calculator/). ## Frequently Asked Questions ### What is APY? **Annual Percentage Yield** is the effective yearly return on a deposit account once compounding is factored in. The [APY Calculator](https://shoutingnow.com/tools/apy-calculator/) converts APR to APY and projects growth from whatever you enter. ### How do I calculate APY from APR? The formula is (1 + APR ÷ n)n − 1, where *n* stands for compounding periods per year. Type your APR into the [calculator](https://shoutingnow.com/tools/apy-calculator/) and APY updates automatically as you change the compound interval. ### What is the difference between APY and APR? **APR** is the nominal rate you see advertised, while **APY** folds in compounding and is what regulators require on deposit disclosures. APY always sits equal to or above APR whenever interest compounds more than once a year. ### Can I add regular deposits? You can, at weekly, monthly, quarterly, half-yearly, or yearly intervals. Each contribution lands at the end of its compounding period, after interest has already accrued. ### What does rate of return (RoR) mean here? It is total interest earned divided by total principal invested, meaning your initial deposit plus contributions, across the full period. Think of it as a simple gauge of how efficiently your cash worked. ### How is this different from the MMA calculator? The [APY Calculator](https://shoutingnow.com/tools/apy-calculator/) is built around APR-to-APY conversion and savings growth, while the [Money Market Account Calculator](https://shoutingnow.com/tools/money-market-account-calculator/) takes APY as its primary input for MMA projections. Need more advanced options? The [Compound Interest Calculator](https://shoutingnow.com/tools/compound-interest-calculator/) has you covered. ```json [{"@context":"https://schema.org","@type":"Organization","name":"ShoutingNow","url":"https://shoutingnow.com/","logo":{"@type":"ImageObject","url":"https://shoutingnow.com/wp-content/themes/shoutingnow-theme/assets/images/logo.png"},"sameAs":["https://x.com/makani20","https://www.linkedin.com/in/makani20/","https://post-see.com"],"contactPoint":{"@type":"ContactPoint","contactType":"customer support","email":"support@shoutingnow.com","url":"https://shoutingnow.com/contact/"},"slogan":"Learn. Build. 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