CPM / CPC Calculator

A CPM/CPC calculator that turns campaign cost and impressions or clicks into cost per thousand impressions, cost per click and click-through rate — whichever metrics your inputs support.

CPM is the cost per thousand impressions (the M is Latin mille) — what you pay for visibility. CPC is the cost per click — what you pay for a visit. CTR, click-through rate, is the bridge between them: the percentage of people who saw the ad and clicked. Enter your campaign cost plus impressions, clicks or both, and this calculator returns whichever metrics your inputs support — CPM from impressions, CPC from clicks, and CTR when you supply both.

Each number answers a different question. CPM tells you whether you're buying attention at a fair price — it varies enormously by platform, audience and season (festival-season auctions in India can double it), so compare your CPM against your own history on the same platform rather than a universal benchmark. CPC tells you what a visitor costs, the number to set against conversion rate and order value when judging viability. CTR tells you whether the creative resonates: a low CTR with a normal CPM means people saw the ad and scrolled past — a message problem, not a bidding problem.

The three interlock — CPC = CPM ÷ (10 × CTR) — which makes diagnosis mechanical. Expensive clicks trace back to either expensive impressions (high CPM: consider broader audiences or different placements) or an unpersuasive ad (low CTR: rework the hook, creative or offer). Run last month's numbers and this month's side by side and you can tell in seconds whether a cost change came from the auction or from your creative — before deciding where to spend the next rupee.