Portable wet/dry vac sizing

Wet/dry shop vac size calculator

Enter cleanup area and debris type. Get tank demand, then a 4 / 8 / 11 gal class — or NO_MATCH. Peak HP still matters for fine dust.

Portable wet/dry vac sizing

Result

Enter values to begin.

Tank demand = (area ÷ 30) × debris (1.0 / 1.5 / 2.2). Classes: 4 · 8 · 11 gal.

Guides

Tank demand, filters, and wet vs dry limits.

Tools

Same tool with room for examples.

Reference

When each tank fits — and when none do.