How to use this tool
Check the units, enter your values, and run the tool. Results follow the assumptions and method below.
Calculation method
Gravel volume outside pipe
length*(width*depth-pi*diameter^2/4)French Drain Calculator
Rectangular trench with a full-length circular pipe. Excludes hydraulic, soil and filter design.
Rectangular trench with a full-length circular pipe. Excludes hydraulic, soil and filter design.
Result
Enter your values and run the tool to see your result.