How the count of records is calculated?

We recieve common question from our users why I see for example "1-25 of about 250 000" rows?
Why you say "about" when displaying number of rows and why I sometimes don't see "about" word?

The way WarpLeads works is when getting results from database we run "estimated count". This count retrieve approximate count of filtered rows with possibility of mistake max 10% but usually much lower like 5%.

If we get estimated count result bellow 50K rows, we after that run real count on database to ensure you see exact count number.
When you see count display without word "about" this is real count result and reflects exact count number from database.

When you see count display with work "about" this is estimated count that can be smaller of higher by 5% from real count.

When estimated count result is above 50K records we don't execute real count after estimated count.