About this calculator
Convert a nominal rate and compounding frequency to annual percentage yield.
APY reflects compounding but not fees, taxes or changing rates.
Formula
APY = (1 + r/n)^n − 1.
Example
5% nominal compounded monthly ≈ 5.116% APY.
Accuracy
NUMTX shows the assumptions next to the calculation so you can replace defaults with values that match your situation. For measurements, supplier rates, fees, interest, tax or regulated work, confirm important figures with the appropriate official or professional source.