This paper reports the results obtained in testing soil moisture of 220 samples of the type "Arenito Bauru" by means of the calcium carbide method ond campares them with those obtained by means of the classic oven drying method. A quite perfect correlation was found between the two sets of results. The coefficient of correlation (r) found was .97 and the equation that describes the ratio between the data obtained with one and the other method is the following: Yc = 0.34 + 1.03 X in which Yc is the content of moisture found gravimetrically and X the content obtained by the Speedy tester. In order to facilitate a quick conversion of the moisture data obtained with the aid of the Speedy tester to those of the gravimetric method, a table was organized based on the above-mentioned equation. The results are read directly from the table for sandy soils of the type "Arenito Bauru". The testing of moisture in soil samples by the calcium carbide method with the aid of the Speedy tester can be of great advantage when it is necessary to determine this characteristic in numerous samples. The method has also proven to be speedy and further it allows the tests to be corried out in the field without needing special installations.