estimator
Word family (noun) estimate estimation estimator overestimate ≠ underestimate (adjective) estimated (verb) estimate overestimate ≠ underestimate
From Longman Business Dictionaryestimatores‧ti‧ma‧tor /ˈestəmeɪtə-ər/ noun [countable]JOB someone whose job is to calculate the probable cost, value, or price of somethingAn estimator can call at the customer’s home, take measurements and quote a price.