Is APY the same as APR?
No. APY describes effective deposit yield after compounding. APR describes borrowing cost under APR rules.
Finance Calculator
APY Calculator
Convert nominal annual rate to APY or reverse APY to nominal rate using the selected compounding frequency.
Last reviewed: June 22, 2026Finance growth method set v1.0.0: compound growth, cash-flow schedules, APY/APR, CAGR, ROI, FV and PV formulasLocal calculations
What the APY Calculator does
APY Calculator turns entered assumptions into deterministic finance math. It keeps deposit yield math separate from borrowing APR math.
How to use the APY Calculator
Enter the visible assumptions, choose Calculate, then review the result card, chart, detailed rows, CSV export and warnings.
- Currency changes formatting only.
- Rates are entered as annual percentages.
- Results are estimates from the assumptions, not product quotes.
Formula
APY = (1 + nominal rate / periods per year)^(periods per year) - 1.
Variables
Common variables are PV for present value, FV for future value, r for annual decimal rate, m for periods per year, t for years, i for periodic rate and PMT for recurring payment.
Assumptions
The calculation keeps full internal precision with Decimal.js and rounds only for display. Investment returns, fees and inflation are assumed constant unless entered otherwise.
Step-by-step calculation
NexaCalc validates the inputs, converts annual rates to periodic rates, applies cash flows in a documented order, aggregates yearly rows and reconciles the displayed schedule to the headline result.
Result interpretation
A higher result means the selected assumptions produce a larger mathematical value. It does not mean the investment, deposit or loan is suitable, guaranteed or officially disclosed.
Worked examples
5% nominal compounded monthly has APY about 5.1162%.
Reversing that APY with monthly compounding returns about 5% nominal.
Limitations
The page does not fetch live market data, does not calculate taxes, does not recommend products and does not replace official disclosures or professional advice.
Financial disclaimer
This calculator provides mathematical estimates for education and planning. It does not guarantee investment performance or replace official financial disclosures or professional advice.
Frequently asked questions
Is the APY Calculator a guarantee?
No. It is mathematical scenario analysis based on the values entered. Actual returns, fees and loan disclosures can differ.
Does changing currency convert values?
No. Currency selection changes formatting only and does not use exchange rates.
Are taxes included?
No. This phase intentionally excludes jurisdiction-specific investment taxes and tax deductions.
Can returns be negative?
Yes where relevant. The calculator allows negative return assumptions above -100% and warns for unusually high assumptions.
Why can official documents differ?
Official documents can use product-specific rules, exact dates, fees, disclosures and rounding conventions that a general calculator does not know.
Does NexaCalc save my financial inputs?
No. Calculations run locally in the browser and the app does not create saved portfolios or accounts.
What does the CSV export include?
Projection tools export yearly schedule rows generated by the same calculation used for the result card.
What precision strategy is used?
The shared engine uses Decimal.js internally and rounds values only for display and exports.
References
- Investor.gov, Compound Interest Calculator, U.S. Securities and Exchange Commission investor education. Source.
- Investor.gov, Understanding Fees, investor education on costs and fees. Source.
- Consumer Financial Protection Bureau, interest rate versus APR borrower education. Source.
- FDIC, Truth in Savings Act / Regulation DD resource family for APY disclosure context. Source.
- Electronic Code of Federal Regulations, Regulation Z source family for Truth in Lending APR context. Source.
- SEC, Mutual Fund Fees and Expenses investor bulletin/source family. Source.
Finance Phase 2 reference families reviewed against Investor.gov, SEC, CFPB, FDIC and regulatory source labels on June 22, 2026.
Financial disclaimer
Investment returns, rates, fees, inflation and cash flows can differ from the assumptions entered. Actual investment values may rise or fall, and past performance does not guarantee future results. Loan APR and deposit APY disclosures may follow product-specific and jurisdiction-specific rules. Review official documents and consult qualified professionals before making a financial commitment.