estimate
verb
roughly calculate or judge the value, number, quantity, or extent of.
the aim is to estimate the effects of macroeconomic policy on the economy
roughly calculate,approximate,make an estimate of,guess,evaluate,judge,gauge,reckon,rate,appraise,form an opinion of,form an impression of,get the measure of,determine,weigh up,size up,guesstimate,consider,believe,deem,hold,adjudge,surmise,take,suppose,regard as being,view as being,see as being,class as being,think of as being,look on as being,be of the opinion,conjecture,opine
noun
an approximate calculation or judgement of the value, number, quantity, or extent of something.
at a rough estimate, staff are recycling a quarter of paper used
rough calculation,approximation,estimation,educated/informed guess,rough guess,impression,approximate price/cost/value,estimated price/cost/value,costing,quotation,pricing,valuation,evaluation,assessment,appraisal,guesstimate