Marketing OS
Free · no account

Ad metrics calculator

ROAS, CPA, CPL, CTR, CPM and frequency from one set of numbers.

Return on ad spend

4.80×

A ROAS means nothing on its own. Add your break-even above and this number gets a verdict instead of a colour-free reading.

Cost per purchase

$25.00

Cost per lead

—

Average order value

$120.00

Click-through rate

2.00%

Cost per click

$0.42

CPM

$8.33

Frequency

3.00

Impressions ÷ reach.

Conversion rate

1.67%

Purchases ÷ clicks.

Revenue

$4,800

on $1,000 of spend

40 conversions is under the 50 a week Meta wants before an ad set leaves the learning phase. If this is a seven-day window, treat the numbers above as a signal, not a verdict — and resist editing the ad set, which restarts learning.

These numbers, for every campaign, every day

Marketing OS syncs Meta and Google Ads into one table with exactly this maths and exactly these thresholds — then rolls it up by creative, by audience and by asset, so the thing that is working is obvious without anyone pasting numbers anywhere.

Start freeSee what it does

How this is worked out

Eight facts go in — spend, impressions, reach, clicks, purchases, leads and revenue — and everything else is derived from them: ROAS = revenue ÷ spend, CPA = spend ÷ purchases, CTR = clicks ÷ impressions, CPM = spend ÷ impressions × 1000, frequency = impressions ÷ reach.

Two of the readings are judgements rather than arithmetic. A ROAS is graded green at or above your break-even, amber between 80% and 100% of it, red below — which is why the break-even field matters more than any other input on the page. Cost per lead is graded the same way in reverse, green at or under target and red more than 25% over.

The learning-phase warning uses Meta’s own rule of thumb — about 50 conversions in seven days before an ad set’s delivery settles — and the frequency warning uses 3.5 for prospecting and 6 for retargeting.

More free tools