Free Fall Calculator – Online Time, Speed, Distance
Enter height and get fall time and impact speed. Simple physics demo. Good for students.
UD5 Toolkit
Calculate square footage, rolls needed, and material cost for your artificial grass project.
Rolls Needed
Enter dimensions and click Calculate
Break your yard into simple geometric shapes (rectangles, circles, triangles). Measure the length and width of each rectangular section in feet. For irregular shapes, measure the widest and longest points. Multiply length × width to get the square footage of each section, then sum them up. Always add 5-15% extra for cuts, pattern matching, and waste. Use our calculator above to handle the math and determine how many rolls you'll need.
Most artificial turf rolls come in 15-foot widths (approximately 4.57 meters), which is the industry standard. Common roll lengths include 25 ft, 50 ft, 75 ft, and 100 ft. A standard full roll at 15' × 100' covers 1,500 square feet. Some manufacturers also offer narrower 12-foot rolls for smaller projects or wider 16.4-foot (5-meter) rolls. Our calculator lets you customize roll dimensions to match your supplier's specifications.
Artificial turf has a directional pile (blades lean in one direction), so all strips must be laid in the same orientation for a natural look. This means you can't simply piece together scraps randomly. Waste occurs from:
We recommend 8-10% waste for simple rectangular areas and 12-20% for complex shapes with many curves or angles.
The number of rolls depends on your area's dimensions, the roll width (typically 15 ft), and roll length. Our calculator automatically optimizes the laying direction to minimize seams and material waste. Here's the general formula:
The calculator also tests both laying directions to find the most efficient option for your specific dimensions.
Artificial turf costs vary widely based on quality:
These prices are typically for materials only. Professional installation adds $3 – $8 per sq ft depending on site preparation, existing surface, and complexity. Use our calculator's price feature to estimate your total material cost.
DIY installation is possible for small to medium projects if you're comfortable with excavation, base preparation, and precise cutting. Key steps include: removing existing sod, installing a compacted gravel/sand base, laying and seaming turf strips, securing edges, and adding infill. However, for large areas (500+ sq ft), complex shapes, or projects requiring grading, hiring a professional is recommended. Improper seaming or drainage can lead to visible lines, buckling, and water pooling.
Artificial turf blades are manufactured with a consistent lean (grain or pile direction). When all strips face the same way, light reflects uniformly, creating a seamless natural look. If strips are rotated, adjacent sections will appear as different shades—this is very noticeable. Our calculator factors in grain direction by calculating strips that all run parallel. When planning your layout, ensure all strips are oriented the same way, typically toward the primary viewing angle (e.g., from your house or patio).
For circular areas, you'll need a square/rectangular piece of turf that covers the full diameter (diameter × diameter). The corners will be trimmed away as waste. For irregular shapes, break the area into smaller rectangles and triangles, calculate each separately, and sum the totals. Our calculator supports rectangle, circle, and triangle shapes. For complex L-shaped yards, use the "Add another rectangle area" feature or calculate each section individually and add them together. Always round up and include extra waste for curves.
Net area is the actual square footage of your lawn space. Purchased material area is what you actually buy, which is always larger because:
Our calculator shows both figures so you understand exactly what you're paying for. The material utilization rate tells you how efficiently the purchased turf covers your actual area.
Enter height and get fall time and impact speed. Simple physics demo. Good for students.
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Simple grid canvas to sketch your home's layout and mark escape routes and meeting point. Print for practice. Local only.
Randomly picks an indoor activity from a curated list sorted by age. No materials, no prep ideas included. Banish boredom.
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Enter temperature and wind speed (or humidity) to get the 'feels like' temperature. Safety guidelines included.
Visualize real‑time linear acceleration (excluding gravity). Watch the 3D vector graph move as you shake the device.
If device has ambient light sensor, estimate lux level and recommend plant types. Local only.