src/org/tiefaces/components/websheet/utility/WebSheetUtility.java
public static short pixel2WidthUnits(final int pxs) {
		short widthUnits = (short) (EXCEL_COLUMN_WIDTH_FACTOR
				* (pxs / UNIT_OFFSET_LENGTH));
		widthUnits += UNIT_OFFSET_MAP[pxs % UNIT_OFFSET_LENGTH];
		return widthUnits;
	}
public static short pixel2WidthUnits(final int pxs) {
		short widthUnits = (short) (EXCEL_COLUMN_WIDTH_FACTOR
				* (pxs / UNIT_OFFSET_LENGTH));
		widthUnits += UNIT_OFFSET_MAP[pxs % UNIT_OFFSET_LENGTH];
		return widthUnits;
	}
pixel units to excel width units(units of 1/256th of a character width).

@param pxs
the pxs
@return the short