French Drain Calculator

Estimate the gravel, pipe, fabric, and fittings for your French drain project — then compare costs across gravel-only, pipe + gravel, and EZ-drain systems.

Trench Length (ft)

Trench Width (in)

Trench Depth (in)

Waste Factor (%)

Pricing (edit to match local rates)

Gravel ($/cu yd)

Perf. Pipe ($/ft)

Landscape Fabric ($/sq ft)

Fitting ($/each)

Trench Cross Section

Pipe + Gravel Cost

$367.31

$7.35 per linear ft

Gravel Needed

3.1 cu yd

83 cu ft

Pipe Length

56 ft

6 fittings

Landscape Fabric

275 sq ft

30.6 sq yd

Material Breakdown — Pipe + Gravel

Purchase Option	Quantity	Est. Cost
Drainage GravelBest value	3.1 cu yd	$168.06
Perforated Pipe	56 ft	$84.00
Landscape Fabric	275 sq ft	$68.75
Fittings (end cap, outlet, couplings)	6 pcs	$48.00

Cost Comparison Across System Types

Purchase Option	Quantity	Est. Cost
Gravel OnlyBest value	3.1 cu yd gravel	$236.81
Pipe + Gravel	3.1 cu yd + 56 ft pipe	$367.31
EZ-Drain	56 ft EZ-drain	$379.53

Best value: Gravel Only at $236.81A gravel-only French drain is the most affordable option. It works well for shallow surface water issues but lacks the directed flow a perforated pipe provides.

This is an estimate for materials only. Actual costs vary by region, soil conditions, and labor. Does not include excavation labor, disposal, or permits. Always verify quantities with your supplier and check local codes before installing a French drain.