27 free tools · 4 focused sections
Excavation & Drainage calculators
Plan earthwork, drainage and water-management projects with volume, weight, grade, slope and transport estimates.
8 calculators
Earthwork, trenches & hauling
Excavation volume, trenches, foundation drainage, truckloads, spoil, compaction and dumpster sizing.
5 calculators
Roof, gutter & downspout drainage
Roof runoff, gutter slope, outlets and downspout capacity.
9 calculators
Surface runoff, erosion & grading
Rainfall runoff, erosion controls, silt fence, swales, rain gardens, slope and paved-surface planning.
5 calculators
Drains, dry wells & ponds
French drains, dry wells, pond volume and other subsurface drainage planning.
About these calculators
Berm volume, culvert pipe ordering, erosion-control blankets, silt fence, French-drain gravel, excavation cost, gutter capacity, trench bedding, gutter slope, excavation truckloads, soil compaction, foundation drainage, downspout sizing, asphalt sealcoat, dumpsters, rain gardens, dry wells, trench spoil, swales, roof drainage, runoff and pond calculators. Each tool provides a task-specific estimate, explains its assumptions, and rounds purchasing quantities where appropriate. Supplier specifications and local requirements remain the final authority.