An exercise amount measuring method using a mobile communication terminal is provided whereby an amount of such exercise as mountain climbing, walking, jogging or the like can be measured through the use of a mobile communication terminal capable of self-reliant navigation. The method comprises the steps of; determining an exercise route which a user has covered from a start position to a current position with a central processing unit; dividing the determined exercise route into a plurality of route segments; calculating a reference exercise amount based on a length of each divided route segment; multiplying the reference exercise amount calculated by a predetermined weighting value to calculate an actual exercise amount for each route segment; and summing up all the exercise amounts calculated for the route segments to reckon and display a total amount of exercise.