1 sho of the existing new kyomasu is in size of 0.49 shaku (a unit of length, 1 shaku is equal to about 30.3 centimeters) square and 0.27 shaku in depth equals to 0.064827 cubic shaku (that is, 0.49 shaku times 0.49 shaku times 0.27 shaku), thus 1 koku equals to 6.4827 cubic shaku.
現行の新京枡の1升が縦横0.49尺・深さ0.27尺で0.064827立方尺（＝0.49尺×0.49尺×0.27尺）であるので、1石は6.4827立方尺となる。