CPA calculator
One engine, five modes, all client-side. Nothing you type leaves the page. Spend sliders cover $100 to $250,000 a month on a power curve, so the low end gets the travel it deserves.
Your CPA$50.00spend ÷ conversions
$5,000 ÷ 100 conversions = $50.00 per acquisition. Judge it against your vertical median and your break-even ceiling, not a universal number.
Mode guide
What each mode solves
CPASpend and conversions in, cost per acquisition out. The head-term job.
Max spendFlip the dial: target CPA times required volume caps the budget. The budget-defense job.
Break-evenAOV, gross margin and repeat rate set the most you can profitably pay per customer. Worked examples
ConversionsBudget divided by target CPA is the volume the plan silently promises. Goal-setting mode.
BlendedTwo channels in, per-channel and blended CPA out, with the dragging channel flagged in red. Why blended matters
Sanity checks
Before you trust the output
- Align windows. Spend from March against conversions attributed into April inflates March CPA and flatters April. The formula page covers attribution distortion.
- Decide action vs acquisition. Platforms count what you told them to count. The definitions differ.
- Judge the result against your vertical, not a universal number. What is a good CPA has the median framing; Target CPA covers what to feed the bid strategy.