Planning guide
What is fabric?
Landscape fabric is a permeable geotextile installed over prepared soil to separate materials, support aggregate installations, and sometimes reduce weed establishment beneath inorganic cover.
How this calculation works
Multiply the finished area's length by its width to find coverage. The calculator adds a 10% planning allowance for trimming, fitting, and other small coverage differences. Required seam overlap can vary with the product and layout.
Common measurement mistakes
- Ordering only the exact measured area with no seam allowance
- Forgetting to overlap adjoining fabric sections
- Measuring one large rectangle without subtracting patios or other uncovered areas
Planning tips
- Overlap adjoining sections according to the product instructions
- Secure seams and edges according to the fabric instructions
- Cut small X-shaped openings around plants and trim neatly at permanent edges
Landscape Fabric Calculator FAQs
How much extra landscape fabric should I buy?
The calculator includes a 10% planning allowance for trimming and small coverage differences. Irregular beds, obstacles, roll width, and required seam overlap can change the amount you need.
How much should landscape fabric overlap?
Follow the fabric manufacturer's instructions. An overlap of 3–6 inches (8–15 cm) is common, but slopes, drainage applications, and separation projects may require a different overlap.
How do I estimate fabric for an irregular area?
Divide the project into simple rectangles, calculate each area, and add them together. Include the overlap and trimming allowance after combining the measured areas.