For Custom Guys

For all the guys that have knowledge or build custom subwoofer enclosures:
What have you found to be the best way to calculate the volume on the inside of the enclosure? Is there a better way to calculate the volume of a weird shaped enclosure before making it and then seeing if its the right volume?

You can calculate the volume in sections and then add them together. To calculate the inside volume just subtract the width of the MDF from the outside dimensions. Even if you calculate the outside volume, then it is not a huge deal because it is going to be a rather minute difference. But be sure to take into account the amount of airspace that the subs take up when building it. If you need anything else just ask.