The difference between assess estimate and evaluate assess Ø to carefully consider a situation, person, or problem in order to make a judgment. We tried to assess his suitability for the job. Our agent will assess the value of your property. Ø to calculate what something costs or is worth. Our agent will assess the value of your property. estimate Ø to say what you think an amount or value will be, either by guessing or by using available information to calculate it. It’s difficult to estimate the cost of making your house safe. The Antarctic ice cap is estimated to contain 90% of the world’s fresh water. Ø estimate something at something. The total cost was estimated at £600,000. We estimate that 20 per cent of the harvest has been lost. It is impossible to estimate how many of the residents were affected. evaluate Ø to think carefully about something before making a judgment about its value, importance, or quality. The performance of each employee is evaluated once a year. The study will evaluate the long-term effects of exposure to radiation.