Erosion Control Blanket Calculator
Estimate erosion-control blanket rolls, effective covered area, staples and material cost from slope dimensions, roll size, overlap and waste.
Default project preview
14 rolls
Net slope area
8,100 ft²
Base layout rolls
12
Modeled layout coverage
10,238 ft²
Nominal purchased area
12,600 ft²
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Slope length
Enter this project assumption in ft. The current imperial default is 90 ft.
Slope width
Enter this project assumption in ft. The current imperial default is 45 ft.
Similar slope sections
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 1.
Blanket roll length
Enter this project assumption in ft. The current imperial default is 112.5 ft.
Blanket roll width
Enter this project assumption in ft. The current imperial default is 8 ft.
Side overlap
Enter this project assumption in in. The current imperial default is 6 in. Minimum: 0.
End overlap
Enter this project assumption in ft. The current imperial default is 3 ft. Minimum: 0.
Cutting and anchoring allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Staples per area
Enter this project assumption in staples/100 ft². The current imperial default is 35 staples/100 ft².
Price per blanket roll
Enter this project assumption in a unitless value. The current imperial default is 118. Minimum: 0.
Price per staple
Enter this project assumption in a unitless value. The current imperial default is 0.18. Minimum: 0.
How to read the outputs
Net slope area
2 slope sections. Default preview: 8,100 ft².
Base layout rolls
two-dimensional strip and segment rounding. Default preview: 12.
Modeled layout coverage
after entered side and end overlap. Default preview: 10,238 ft².
Nominal purchased area
full roll dimensions. Default preview: 12,600 ft².
Estimated staples
entered density plus allowance. Default preview: 3,119.
Material cost
blankets and staples. Default preview: $2,213.42.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Strips per slope and length segments per strip are rounded independently after accounting for side and end overlap. Those layout counts are multiplied by the number of slope sections, then the entered allowance is applied and the order is rounded to full rolls.
FAQ
Erosion Control Blanket Calculator questions
Should rolls run up-and-down or across the slope?+
Installation direction depends on the product and erosion-control detail. Follow the approved plan and manufacturer instructions.
Why is nominal purchased area larger than effective coverage?+
Overlaps, anchor trenches and full-roll rounding reduce the area that each roll can cover in the field.
Does the staple density stay constant?+
No. Steeper slopes, channels, loose soil and high-flow areas may require closer anchoring.