Return on spend
Whether the campaign paid for itself, before and after margin.
ROAS divides revenue by ad spend, ROI divides profit by it. The one-line conversion between them, and why a 3.74 ROAS can be a gain or a loss.
Read the guide →ROAS is revenue divided by ad spend. How to calculate it, and why tax and shipping in conversion value can hide a losing campaign above break-even.
Read the guide →Marketing ROI is profit minus cost, over cost. One campaign can read +257%, +50% or -10% depending on which revenue you let into the formula.
Read the guide →MER is ROAS plus organic revenue divided by ad spend. The second term shrinks as you scale, so the ratio falls while profit rises. The maths, worked.
Read the guide →POAS measures gross profit per dollar of ad spend, not revenue. The formula, how it differs from ROAS, realistic bands, and where it breaks.
Read the guide →A good ROAS is the one that clears your break-even, which depends on contribution margin. The formula, benchmark ranges, and what inflates it.
Read the guide →