About this calculator
Calculate cost per acquisition from spend and conversions.
Define an acquisition consistently—sale, signup or another target action.
Formula
CPA = spend ÷ acquisitions.
Example
1,000 spend ÷ 50 acquisitions = 20 CPA.
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.