Accurate calculation of enclosure volume for your subwoofer box is essential in designing a properly functioning subwoofer. This calculator will calculate the volume for a wedge shaped sealed subwoofer enclosure and requires the use of decimals (.25, .50, .75 etc.). For a wedge shaped subwoofer enclosure, you will need to enter both depth measurements (Depth 1 and Depth 2) your desired box dimensions and material thickness to calculate your internal volume NOT including speaker displacement.