PPC Campaign Calculator

This calculator projects a pay-per-click campaign's monthly performance from five inputs, then rolls the results up into efficiency metrics that don't depend on campaign size. Monthly figures assume a flat 30-day month (Daily Budget x 30, Daily Clicks x 30) for simplicity, rather than the 30.4-day average Google Ads itself uses -- a difference of about 1.4%, small enough not to change any of the efficiency ratios but worth knowing if you're reconciling against an actual Google Ads monthly report. Daily Budget and Average CPC set how many clicks the campaign can buy (Daily Budget / Average CPC = daily clicks), which then flow through Conversion Rate and Avg Order Value to projected conversions and revenue. A structural point worth knowing: ROAS, Campaign ROI, Cost Per Conversion, and Break-Even CPC are all budget-independent -- doubling Daily Budget doubles Monthly Clicks, Monthly Conversions, Monthly Revenue, and Monthly Budget together in exact proportion, so the ratios between them (which is what the efficiency metrics measure) never move. Daily Budget only ever tells you HOW MUCH volume you'll get at a given efficiency, never whether that efficiency is good.

The one exception is a $0 Daily Budget, where ROAS and ROI both read as a flat 0 -- read that as "not applicable" (no spend, no clicks, no conversions to measure a ratio from), not as a genuine breakeven result. ROAS (Return on Ad Spend) is Monthly Revenue divided by Monthly Budget -- a ROAS of 1.0 means revenue exactly equals spend, breakeven before accounting for the cost of goods sold. Campaign ROI, by contrast, nets out Profit Margin first, so it can (and, at this calculator's defaults, does) read negative even while ROAS reads positive: spending $3,000 to bring in $2,880 of revenue at a 30% margin returns only $864 in gross profit, a real loss against the $3,000 spent. Break- Even CPC answers a different question -- the maximum you could pay per click and still break even at the given conversion rate and margin -- and is independent of both Daily Budget and Average CPC entirely, so it doesn't change as you test different bid levels.