Last checked against Google’s documentation on 29 September 2026.
The short answer
In Google Ads, one vs every conversion is the Count setting on each conversion action. Every counts every conversion that happens after an ad click. One counts only one conversion per ad click. Use Every for purchases, where each sale is worth something. Use One for leads, where a second form from the same person is not a second customer.
Getting this wrong inflates conversions, makes cost per conversion look better than it is, and feeds Smart Bidding a signal that doesn’t match the business. It takes a few minutes to check, and the fix only applies going forward, so check it early.
One vs every conversion in Google Ads
Google’s conversion counting article defines the two options:
| Setting | What it counts | Good fit |
|---|---|---|
| Every | Every conversion for that action after an ad interaction | Purchases, orders, anything where each repeat adds value |
| One | Only one conversion per ad click | Leads, sign-ups, quote requests, calls |
A simple example. Someone clicks an ad, fills in a contact form, then fills it in again an hour later because they forgot to add a phone number. With Every, that is two conversions. With One, it is one. For an online store where a shopper clicks once and places two separate orders, Every records both sales, which is what you want.
The setting is per conversion action. An account can, and often should, count purchases as Every and lead forms as One at the same time.
Why lead actions should count one
Google’s guidance is that One is the right choice when you care whether a lead was generated, not how many times it happened. In practice, lead actions double up more than people expect:
- People resubmit forms when the confirmation is slow or unclear.
- A thank-you page gets reloaded or revisited and the tag fires again.
- Someone calls from the ad, then fills in the form on the same visit.
- A multi-step form fires the conversion on more than one step.
If your ad platform reports noticeably more leads than your inbox, CRM, or sales team receives, count settings are the first place to look. Compare a month of conversions in Google Ads with the number of real leads you received in the same month. A big gap on an action set to Every is a strong hint.
Counting one per click does not fix everything. If the same person is counted by two different primary actions (for example, a form submit and a thank-you page view that track the same thing), you still count them twice. Each real outcome should have one primary action.
How counting changes bidding
Primary conversion actions feed the Conversions column, and Smart Bidding uses that column to optimize. So the count setting doesn’t just change a report: it changes what the bid strategy is chasing.
- If a lead action counts Every, searches and audiences that produce repeat submissions look more valuable than they are, and bidding leans toward them.
- Your cost per conversion looks lower than your real cost per lead. A target CPA set from that number will be too low once counting is fixed.
- When you switch to One, reported conversions fall and cost per conversion rises. Nothing got worse; the numbers got honest.
If you use Target CPA or Target ROAS, review the target after changing the count, and give the strategy time before judging it. Our guide to Target CPA campaigns that stop spending covers what happens when a target is set too low.
Primary vs secondary conversions
Counting decides how many times one action is recorded. Primary and secondary decide whether that action counts toward bidding at all. Google’s article on primary and secondary actions explains:
- Primary actions are used for bidding and reporting, as long as the campaign optimizes toward that goal. They appear in the Conversions column.
- Secondary actions are observe only. They are excluded from the Conversions column and appear in All conv.
A sensible setup: make the actions that represent real business outcomes primary (a purchase, a qualified lead form, a call of meaningful length), and make supporting actions secondary (page views, add-to-cart, clicks on an email link). If both a form submit and its thank-you page view are primary, you are counting one lead twice no matter which count setting you use.
The conversion window
The conversion window sets how long after a click a conversion can still be counted. Google’s conversion window article gives these details:
- Click-through window: default 30 days. Depending on the conversion source, it can be set from 1 day up to 30, 60, or 90 days.
- Engaged-view window (video): default 3 days, adjustable up to 30 days.
- View-through window: default 1 day, adjustable up to 30 days.
Match the click-through window to how long your customers really take. Check the Days to conversion segment (Campaigns > Segment > Conversions) to see the spread. If almost every conversion arrives within a week, a 90-day window adds little. If a meaningful share arrives after 30 days, a 30-day window drops them, and bidding never learns from them.
Google notes that Smart Bidding strategies count and optimize conversions within whatever window you choose, and that a conversion missed by an earlier window is not counted retroactively. A longer window also means recent days keep filling in for longer, so reporting on the last few days will look weaker for longer.
How to change counting and window
Google’s steps for changing the count setting:
- Open Goals, then Conversions > Summary.
- Click the name of the conversion action.
- Select Edit settings.
- Under Count, choose One or Every.
- Save.
The conversion windows are in the same Edit settings view. To switch an action between primary and secondary, edit the goal, expand Conversion action optimization, and choose Primary or Secondary (observe only), as described in Google’s conversions summary guide.
Two rules to keep in mind. Google says count changes apply only to future conversions and not to an action’s past data, and the same is true of window changes. So write down the date of every change, and don’t compare a period before the change with one after it as if nothing happened.
A five-minute counting audit
- List every primary conversion action. Is each one a real business outcome?
- For each lead-type action, check the count. It should almost always be One.
- For each purchase-type action, check the count. It should usually be Every.
- Look for two primary actions tracking the same outcome, such as a form submit and its thank-you page.
- Check the Days to conversion segment against each click-through window.
- Compare a month of Google Ads conversions with the real leads or orders you received.
- After any change, note the date and review bid strategy targets.
If conversions stopped altogether rather than looking inflated, start with why Google Ads conversions dropped to zero. For a broader review of the account, use the Google Ads audit checklist.
Boxoo’s tracking and measurement agent reads the count setting, the conversion window, and the primary or secondary status of each conversion action, and files a case when a setting doesn’t fit what the action tracks. It can change the count and the window for you, but only after you review the case and press Apply. Other conversion setup, such as tags, is handed to you as exact steps. You can run a free Google Ads audit to see it on your own account.
