French Drain Cost Calculator › 40×12 at 12 inch depth
Drainage calculatorFrench Drain Cost Calculator: 40×12 at 12 inch depth
Pre-configured estimate for Trench length: 40 ft · Trench width: 12 in · Trench depth: 12 in. Adjust any field to recalculate.
About this size
This page pre-fills the french drain cost calculator for a 40×12 at 12 inch depth job — one of the most common sizes people search for. The figures update live if your project differs, and the assumptions behind them are explained on the main french drain cost calculator page.