- Waste Factor: Artificial grass is sold in 15-foot wide rolls, meaning you will inevitably have to trim edges. Always calculate your square footage and add at least a 10% waste factor (15% for curved or irregular yards).
- Infill Requirements: Infill weighs down the turf, keeps the blades standing up, and protects the backing from UV rays. Standard installations require 1.5 lbs of infill per square foot.
- Base Preparation: Never install turf directly on dirt. You must excavate 3 to 4 inches and fill it with compacted Class II road base or Decomposed Granite (DG) to ensure proper drainage and a flat surface.
The Ultimate Guide to Calculating Artificial Grass Materials
Installing artificial turf is an excellent way to save water, eliminate mowing, and maintain a green lawn year-round. However, because synthetic grass is sold in massive 15-foot wide rolls, calculating the exact amount of material you need can be tricky. It is not just about the turf itself—you also need to estimate base rock, seam tape, and infill sand.
Our interactive Artificial Grass Calculatortakes the guesswork out of your landscaping project. By simply entering your yard's dimensions, it calculates the square footage of turf needed (including waste), the number of 50lb infill bags required, and the cubic yards of sub-base material.
Understanding Turf Installation Components
A successful artificial grass installation requires a layered system. Here is a breakdown of the materials calculated above:
- The Turf (Square Footage): Because turf comes in large rectangular rolls (usually 15 feet wide), cutting it to fit circular or irregular yards generates scrap. This is why a 10% to 15% waste factor is universally recommended by installers to ensure you have enough material to cover the entire area without patching together tiny scraps.
- Sub-Base Rock (Decomposed Granite): Turf cannot be laid on topsoil; it will sink, shift, and fail to drain. You must excavate the soil and replace it with 3 to 4 inches of compacted aggregate base. This calculator determines how many cubic yards of base rock you need to order from the quarry.
- Infill (Silica Sand or Antimicrobial Coated Sand):Infill is brushed into the grass blades after installation. It adds weight so the turf doesn't wrinkle, keeps the plastic blades standing upright, and acts as a ballast. Without infill, your turf will look matted and fake within a few weeks.
- Seam Tape & Glue: If your yard is wider than 15 feet, you will need to join two rolls of turf together. This is done using specialized seam tape and weather-resistant adhesive applied along the underside of the join.
Frequently Asked Questions
How do I measure my yard for artificial grass?▼
Measure the length and width of the area you want to cover in feet. If your yard has an irregular shape, break it down into smaller rectangles, calculate the area of each, and add them together. Always add a 10% to 15% waste factor for cutting and trimming around edges.
How much infill do I need for artificial turf?▼
The amount of infill (silica sand, rubber, or pet deodorizer) depends on the pile height of your turf and its intended use. A general rule of thumb is 1 to 2 pounds of infill per square foot of artificial grass.
How much seam tape do I need?▼
Artificial grass usually comes in rolls that are 15 feet wide. You will need seam tape wherever two rolls meet. Plan your layout to minimize seams, and measure the linear length of where the rolls connect. Add 10% extra tape to account for overlap and trimming.
What is base rock or DG?▼
Before laying turf, you must create a solid, draining base. This is usually 3 to 4 inches of Class II road base or Decomposed Granite (DG), compacted tightly. Our calculator helps you estimate the cubic yards of base material required.