CoirSure · Trade tools

Coir Geotextile Roll Calculator

Indicative quantities for slopes, embankments and flat areas. A guide for budgeting and quoting only — not a design tool.

Estimate only — not for construction.

This calculator gives an approximate roll quantity based on standard assumptions for laps, anchorage and waste. Actual requirements depend on your site geometry, specification, soil, hydrology and installation method. Always confirm quantities, product grade, lap widths, anchoring and pinning patterns with your project engineer or designer before ordering. CoirSure accepts no liability for orders placed on the basis of this estimate.

01Application type

Slope / embankmentFlat or gently graded areaChannel, swale, ditch or riverbank

02Site geometry

Length along the crest (m)

1–5000 m

Slope input method

Vertical height (m)

0.01–5000 m

Slope ratio (1V:xH)

Crest anchor trench allowance (m)

0–100 m

Toe key-in allowance (m)

0–100 m

Intermediate check slots (count)

0–1000 slots

03Product

Grade (GSM)

Roll width (m)

Roll length (m)

Need a custom roll length to cut waste on a large project? Ask us — we can supply project-specific lengths with sufficient lead time.

Advanced · installation assumptions

Side lap (m)

0.05–0.5 m

End lap (m)

0–5 m

Contingency for irregular shapes (%)

0–20%

Allow offcuts to be joined with end laps

Estimated rolls to order

38rolls

2 m × 50 m, 900 GSM

Roll estimate breakdown
Slope length	13.42 m
Net area to cover	2,683 m²
Strip length incl. anchorage	14.82 m
Effective roll width	1.90 m
Number of strips	106
Strips per roll	3
Offcut per roll	5.55 m
Contingency applied	5%
Total ordered area	3,800 m²
Material over net area	41.6%
Weight per roll	90 kg
Total weight	3.42 t (3,420 kg)
Indicative pins/pegs	5,367 (2 per m²)

Figures are indicative. Bills of quantities usually measure net area excluding laps; your supplier quote may be in rolls. Pin quantities are a rough guide; follow the manufacturer's or designer's pinning pattern.

Ordered area is higher than net area because of laps, anchor trenches and the unusable offcut at the end of each roll.

Each roll weighs about 90 kg. Plan for two-person or mechanical handling on site.

Estimate only — not for construction.