Is this calculation free and private?

Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.

What does the French Drain Gravel & Pipe Material Calculator give me?

It works out Washed Drainage Gravel Required, Gravel Volume, Geotextile Filter Fabric and Perforated Drain Pipe Length, updating live as you change the inputs.

What do I need to enter?

Just Trench Total Length, Trench Width, Trench Depth and Perforated Pipe Size. Every field has a sensible default you can start from.

Is my data uploaded anywhere?

No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.

Does it work on a phone?

Yes. The layout adapts to small screens and needs no app or signup.

French Drain Gravel & Pipe Material Calculator

Calculate perforated drainage pipe length, washed drainage stone (tons & cu yds), and non-woven geotextile fabric for yard French drains.

100% free
Private in browser
No signup
No watermarks

Trench Total Length (Feet)

Trench Width (Inches, typically 12")

Trench Depth (Inches, typically 18"-24")

Perforated Pipe Size (Inches, 4" standard)

Washed Drainage Gravel Required (Tons)

4.7

Gravel Volume (Cubic Yards)

3.5

Geotextile Filter Fabric (Sq Ft)

330

Perforated Drain Pipe Length (Feet)

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About French Drain Gravel & Pipe Material Calculator

Calculate perforated drainage pipe length, washed drainage stone (tons & cu yds), and non-woven geotextile fabric for yard French drains. Enter Trench Total Length, Trench Width and Trench Depth and the tool works out Washed Drainage Gravel Required, Gravel Volume and Geotextile Filter Fabric straight away. Everything runs in your browser, so your data never leaves your device.

How to use French Drain Gravel & Pipe Material Calculator

Enter Trench Total Length, Trench Width and Trench Depth.
Adjust the remaining options (Perforated Pipe Size) to match your case.
Read Washed Drainage Gravel Required, Gravel Volume and Geotextile Filter Fabric in the results panel — copy or download what you need.

Key features

Shows Washed Drainage Gravel Required (Tons)
Shows Gravel Volume (Cubic Yards)
Shows Geotextile Filter Fabric (Sq Ft)
4 adjustable inputs, results update as you type
No signup, no limits

Frequently asked questions

Is this calculation free and private?: Yes, 100% of calculations execute locally in your web browser. No inputs or personal data are stored or transmitted.
What does the French Drain Gravel & Pipe Material Calculator give me?: It works out Washed Drainage Gravel Required, Gravel Volume, Geotextile Filter Fabric and Perforated Drain Pipe Length, updating live as you change the inputs.
What do I need to enter?: Just Trench Total Length, Trench Width, Trench Depth and Perforated Pipe Size. Every field has a sensible default you can start from.
Is my data uploaded anywhere?: No. The calculation runs in your browser with JavaScript — nothing you type is sent to a server or stored.
Does it work on a phone?: Yes. The layout adapts to small screens and needs no app or signup.

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