Box help

[Marchant89]

Is there a box calculator I can use to try and figure out how get certain tune with a certain dimension I can’t change for instance I need one seat in my back so I don’t take out everytime I need a car seat.  So 38” door to seat but I’m willing to go up to 36” high at max and up to 24” foward to back need it tuned at 32hz for dual 15”