free tool
Ad Metrics Calculator
Enter your spend and results to get CPM, CPC, CTR, CPA, conversion rate, and ROAS in one view. No signup, instant math.
CPM
$10.00
CPC
$0.67
CTR
1.50%
CPA
$16.67
Conv. rate
4.00%
ROAS
3.60x
CPM = spend / impressions x 1,000. CPC = spend / clicks. CTR = clicks / impressions. CPA = spend / conversions. Conversion rate = conversions / clicks. ROAS = revenue / spend.
What each metric means
CPM (cost per 1,000 impressions) and CTR (click-through rate) measure the top of the funnel: how cheaply you reach people and how well the creative earns the click. A strong hook lifts CTR and pulls CPM down, because platforms reward engaging creative with cheaper delivery.
CPC, conversion rate, and CPA measure what happens after the click, and ROAS ties it all back to revenue. The single biggest lever on most of these is the creative itself, which is why testing many ad variants cheaply tends to move the numbers more than audience tweaks.
Pair this with the break-even ROAS calculator to see whether your ROAS is actually profitable for your margin.
Frequently asked questions
How do you calculate CPM, CPC, and CPA?
CPM is spend divided by impressions, times 1,000. CPC is spend divided by clicks. CPA (cost per acquisition) is spend divided by conversions. CTR is clicks divided by impressions, and conversion rate is conversions divided by clicks.
How is ROAS calculated?
ROAS (return on ad spend) is revenue divided by ad spend. A ROAS of 3 means you earned $3 in revenue for every $1 spent. Whether that is profitable depends on your margin: compare it to your break-even ROAS, which is 1 divided by your gross margin.
What is a good CTR or conversion rate on paid social?
Benchmarks vary by platform and offer, but paid-social CTRs commonly land around 1% to 2%, and landing-page conversion rates around 1% to 3% for cold ecommerce traffic. Treat these as rough reference points, not targets, since your product, price, and audience move them a lot.
Is the ad metrics calculator free?
Yes. No signup, no email, no credit card. The full UGC Vids AI product (model picker, avatars, finished video ads) is the paid offering; this calculator is free forever.