The guestimator is a useful tool for estimating project costs.

The guestimators are arriving for the conference.

I had to make a guestimate of how many people would attend the event.

I guestimate that there are about 100 people at the party.

I made several guestimates for the project's budget.

I am guestimating the number of attendees for the event.

I guestimated the number of attendees at the event.

Guestimations are often used when there is not enough data available.

Guestimation is a term used to describe the act of making an estimate or guess.