Free PPC ROI Calculator

Type your campaign numbers in the left column and the results update as you go. Switch between ecommerce (average order value and margin) and lead generation (lead value and close rate), and between pounds and dollars. Nothing is stored and nothing is sent anywhere.

A PPC ROI calculator is only as honest as the numbers you put in. Every input below comes straight out of your Google Ads account, your analytics or your own accounts, and each one has a sensible starting point if you are planning a campaign that has not run yet. The results update in real time, so it is worth spending a minute getting the inputs right rather than guessing.

ROI and ROAS get used interchangeably and they are not the same thing. Return on ad spend divides revenue by ad spend and says nothing about profit. Return on investment divides profit by total cost, which is the number a business owner actually cares about. A campaign can show a 300% ROAS and a negative ROI at the same time if the margin is thin or the management fee is high. The calculator shows both, side by side, so the difference is never hidden.

The break-even figures are the most useful outputs on the page, because they turn a result into a rule you can act on inside the ads account. Break-even cost per click is the most you can pay for a click and still make nothing: conversion rate × gross profit per conversion, divided by one plus the fee. Break-even cost per conversion, sometimes called the target CPA, is gross profit per conversion divided by one plus the fee. Break-even conversion rate is the rate your landing page has to reach at your current CPC. Set your maximum bids and your target CPA a safe distance below those numbers, usually 15 to 25% below, and the campaign cannot quietly slide into a loss.

One more distinction matters for lead generation. A lead is not a customer. If a solicitor closes one enquiry in four, the value of a lead is a quarter of the value of a client, and the campaign has to be judged on the client, not the form fill. The lead generation mode of the calculator builds that close rate in, which is why its ROI can look very different from the same spend in ecommerce mode.

There is no honest single answer, because the average PPC ROI across every industry blends a £2 ecommerce click with a £40 legal click and a hotel booking with a B2B software demo. Google’s own economic impact estimate, repeated for years, is that advertisers make roughly two pounds of revenue for every pound spent on search ads, which is a 2× ROAS and, after margin and fees, often a modest or negative ROI. Industry benchmark studies report average conversion rates, click-through rates and costs per click that vary several-fold between sectors: legal, finance and home services carry the highest CPCs and the highest customer values; ecommerce and travel carry low CPCs, low margins and volume. Quoting a global average tells you almost nothing about your account.

What is useful is a rule of thumb for your own model. In ecommerce, a return on ad spend of three to five times revenue is the common target because most gross margins sit between 30% and 60%, which turns a 4× ROAS into a positive ROI after costs. In lead generation, the target is usually framed as a cost per lead or cost per acquisition that sits well under the gross profit of a customer, with the close rate built in. A good PPC ROI is therefore not a number you look up; it is the point at which the campaign’s net profit clears the alternative uses of the same money, including organic search, which takes longer and then costs nothing per click.

Two warnings on benchmarks. First, most published averages come from tools vendors and agencies and describe their own client base, not the market. Second, a campaign in its first month is not a benchmark of anything: bids, quality scores and audiences settle over six to twelve weeks, and the calculator’s job in that period is to set the guardrails, not to pass judgement. Treat any figure above as a starting assumption and replace it with your own data as soon as conversion tracking has a month behind it.

Run enough Google Ads accounts and the same failures repeat, and almost none of them show up in a revenue-only report. The calculator makes each one visible as a number that moved. These are the causes to check, in the order they usually turn out to matter.

Every input in the calculator is a lever, and they are not equal. Use the tool to test each one before touching the account: change one number, watch the ROI, and you will know where the next hour of work should go.

Most people arrive at a PPC budget calculator after the money has been spent. The better use is before the campaign starts, as a planning tool: it turns a guess about ad spend into a set of guardrails you can type into the ads account on day one, and it tells you how much budget a campaign needs before its results mean anything.

The calculator is platform-neutral because the economics are. Every pay-per-click platform sells clicks at an auction price, sends them to a page you control and reports conversions you define. What changes between platforms is the typical cost per click, the typical conversion rate and the quality of the intent behind the click, so the inputs move even though the formula does not.

Cost and traffic

Pay-per-click, or PPC, is the advertising model where advertisers pay a fee every time their ad is clicked. Cost per click, CPC, is that fee, averaged across a campaign. Impressions are how often the ad was shown; click-through rate, CTR, is clicks divided by impressions and reflects how relevant the ad copy is to the search. Ad spend or advertising budget is the total paid to the platform in a period; daily budget is the platform’s spending cap per day. Ad rank and ad position describe where the ad sits on the results page, and Quality Score is the platform’s rating of expected click-through rate, ad relevance and landing page experience, which discounts the CPC for relevant ads. Match types, exact, phrase and broad, control which search queries trigger the ad; negative keywords block the queries you never want to pay for; the search terms report shows what people actually typed.

Conversions and value

A conversion is the desired action after the click: a purchase, a lead form, a phone call, a booking, an app install. Conversion tracking is the setup that records it; conversion actions are the individual events; enhanced conversions and offline conversion import add the sales that close later in a CRM. Conversion rate, CVR, is conversions divided by clicks. Cost per conversion, cost per acquisition (CPA) or cost per lead (CPL) is spend divided by conversions. Conversion value is the revenue assigned to each conversion; average order value, AOV, is the mean basket in ecommerce; lead value is what a lead is worth once the close rate is applied; customer lifetime value, LTV, is the profit a customer brings over the whole relationship rather than the first order. Close rate, or lead-to-customer rate, is the share of leads that become paying customers.

Returns

Return on ad spend, ROAS, is revenue divided by ad spend, usually written as a multiple such as 3× or a percentage such as 300%. Return on investment, ROI, is net profit divided by total cost, where total cost includes the ad spend, any management fee and, if you are being thorough, the cost of the landing pages and the tracking. Gross profit is revenue minus the direct cost of the product or service; gross margin is that as a percentage; net profit here is gross profit minus the advertising costs. Break-even CPC, break-even CPA and break-even conversion rate are the values at which net profit is exactly zero, and they are the practical output of any PPC ROI calculation. Target CPA and target ROAS are the automated bidding strategies that ask the platform to aim for a cost per conversion or a return on ad spend you specify; Maximise conversions and Maximise conversion value are the versions without a target. Performance Max is the campaign type that runs across search, Shopping, display, video and other placements from one budget and one set of assets.

Ads benchmarks by industry are published every year by the big tools vendors, and the pattern is stable even when the exact figures move: the more a customer is worth, the more the click costs, and the harder the conversion is to win. The calculator is built to take those differences as inputs rather than hide them behind an average, so here is how the numbers usually sit for the kinds of businesses BoltClicks works with, as starting assumptions to be replaced by your own account data.

Whatever the industry, the same discipline applies: one conversion action per real business outcome, a customer value that comes from the accounts rather than a guess, and a bid ceiling set from break-even. Industry benchmarks tell you whether your CPC is unusual; only your own margin tells you whether it is affordable.

The fastest way to make the calculator accurate is to pull the last ninety days from the account rather than typing what you remember. Every input has a home in the standard reports, and a few settings decide whether those reports can be trusted at all.

If those settings are missing, the calculator will still give a number, but the conversion rate feeding it is a guess, and a free account audit is worth more than any forecast. Fixing tracking is the first task in every account taken on here, before a single bid is changed, because every decision downstream, from budget allocation to bid strategy to the weekly report, depends on the conversion data being true.