Article

Why you can't add up daily users in GA4

Gleamworthy · October 25, 2026

Here’s a common surprise. You look at a Google Analytics 4 report by day, add up the users for each of the last seven days, and get 1,400. Then you look at the same seven days as a single total and see 900. Which is right?

The 900 is. The 1,400 counts some people more than once.

Unique users don’t sum

A user in GA4 is a distinct person (or more precisely, a distinct browser or device). On any one day, each person counts once, no matter how many pages they view.

Now imagine a reader who visits your blog every morning. On each daily row, they count as one user. Add up seven days, and they count as seven. But across the week, they’re still one person. The weekly total counts them once.

So for any range longer than a day:

The sum of daily users is always greater than or equal to the total users for the whole range.

The more loyal your audience, the bigger the gap. A site with many returning visitors can show a sum that’s double the real total, or more.

Page views do add up

This only applies to counts of people. Views (page views and screen views) are events, and events do add up. Seven days of 1,000 views each really is 7,000 views.

How to get the right number

Ask Google Analytics for the whole range at once, instead of day by day:

In the GA4 interface, set the date range and read the total at the top of the report, not a sum of the rows.
In the Data API, run the report for the full date range without a date dimension. Adding the date dimension splits users by day, and those rows can’t be added back together.

Comparing ranges fairly

To know whether you’re growing, compare the total for this period with the total for the previous period of the same length, each queried as a whole. Comparing a summed week with a real week mixes two different kinds of numbers.

How Synopsy handles it

Synopsy queries visitor totals for each whole range, never from daily rows, and compares them with the immediately preceding range of the same length. Its charts follow the same rule: in the 7-day view, each six-hour bar counts people who were distinct within that window, and the 90-day view shows average daily visitors for each three-day group, labeled as such. The headline total always comes from its own query, not from the chart.

Combining several websites raises the same question one level up. Synopsy’s combined total adds each site’s total, so someone who visits two of your sites counts twice, and Synopsy says so. Google has no way to recognize the same person across separate properties.