Retaining Wall Drain Pipe Length and Cost Calculator

Estimate pipe length, fittings, gravel, and total cost for a backyard retaining wall drain.

Calculator Inputs
Fill the fields below and press Calculate.
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Changing units auto-submits to update labels.
Examples: $, € , £ , PKR
Adds extra length/area for cuts and mistakes.
Project details
Used for planning; calculation is linear-length based.
Common landscape drains: ~1% when feasible.
Pipe & layout options
Used for planning; total length uses runs × length.
Used when method = spacing.
Used when method = count.
Counts as elbows in the estimate.
Adds length for risers/daylighting climbs.
Adds extra solid pipe after perforated section.
Extra pipe for connections (optional).
Examples: 10 ft sticks, 3 m sticks, 30 m rolls.
Gravel & fabric
Typical: 12 in wide × 12 in deep (or 30 cm × 30 cm).
If > 0, uses this instead of depth.
Area = total run length × fabric height.
Pricing
Pop-up emitter, grate, rodent guard, etc.
Used when pricing mode = volume.
Used when pricing mode = bag.
Used when pricing mode = bag.
Labor & totals
Helps cover unknowns and small extras.
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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.