guesstimatrix 

Someone who thinks they can estimate cost or duration of a renovation project but who have zero construction experience and really and truly has no clue what is involved. A Guesstimatrix, always a female, is obviously smarter overall than a Guesstimator. Despite this natural female smartitude, Guesstimatrices (plural) have no business estimating costs or duration of projects.

She’s planning another home reno! And we all know it’ll be 300% over-budget and take months longer than planned…next time that Guesstimatrix needs to hire a real contractor!

guesstimatrix by Mandi Harmony June 23, 2021

Guesstimation 

A guess towards a possible estimation of some sought.

My guesstimation will be for another 3 hours of driving.

Guesstimation by gaetano November 2, 2007

Guesstimation 

When you don't know how much it costs so you make a guesstimation.

According to my guesstimation, this toy would cost $30.
Let's guesstimate how much this would cost.

Guesstimation by CoolioV August 25, 2018