Free calculator

Silt Fence / SWPPP Totalizer

Count the posts, rolls, and trench spoil for a silt fence installation — the first number your SWPPP contractor will ask for.

Results

Enter your dimensions and hit Calculate.

Silt fence placement, inspection, and maintenance are governed by your local SWPPP / stormwater permit. This calculator covers materials only.

Assumptions

  • Post count = ceil(length / spacing) + 1 (one extra for the terminal post).
  • Trench is 6" × 6" cross-section for the fabric toe-in — standard erosion-control practice.
  • Fabric rolls are ceiling-rounded.

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Land Planning Master Checklist

The complete checklist for planning your property — from raw land to build-ready site. Clearing, access, drainage, septic, utilities, permits, foundation, and everything in between.

  • ✓Every stage in the right sequence
  • ✓What to verify before each phase starts
  • ✓Questions to ask your contractor
  • ✓Common mistakes and how to avoid them

Free account — includes the checklist + 3 saved calculations.

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