Geocell Infill Quantity, Tonnage & Panel Count

The formula

This is the expression the tool evaluates. Every term is named underneath, with the unit it must be supplied in.

How the result is derived

Step by step, from the values you type to the figure on screen.

1. The 8 inputs are read from the form on every keystroke: Area to Cover, Cell Depth (Height), Overfill Cover above the Cells, Compacted Bulk Density of the Infill, Loose-to-Compacted Allowance, Payload per Truck, Expanded Panel Length and Expanded Panel Width.
2. Each value is checked against the accepted range in the input table below. A value outside its range stops the calculation rather than producing a misleading figure — the results blank out and a message appears.
3. The validated values are substituted into the expression above, which resolves Loose Infill to Order together with every supporting figure in one pass — no value is carried over from a previous entry.
4. The supporting outputs — Compacted Volume in Place, Of Which Inside the Cells, Infill Tonnage, Tonnage per m², Truck Loads, Expanded Panels and Area per Panel — come from the same pass, so they always describe the same case as the headline figure.
5. Results are rounded for display only. The full-precision value is used throughout the chain, so reading a rounded intermediate figure back into the tool by hand can shift the last digit.

What each input means

Where to read each value on the floor, the unit it must be in, and the range the tool accepts.

What the tool returns

The headline figure and every supporting value it is built from.

Worked example

Substituting

Dropping the 50 mm cover saves a quarter of the infill: 75 m³ compacted, 135 t, 7 trucks.

How to use it

1. Work through the input groups in order — Layer and Infill & Panels. The defaults are a realistic case, so you can change one value at a time and watch what moves.
2. There is no calculate button. Every figure recalculates as you type or drag, which is what makes this usable for a what-if sweep rather than a single answer.
3. Read Loose Infill to Order in the dark results panel — that is the headline figure, expressed in m³.
4. Check the supporting rows underneath (Compacted Volume in Place, Of Which Inside the Cells, Infill Tonnage, Tonnage per m², Truck Loads, Expanded Panels and Area per Panel) before acting on the headline — they are where an implausible input usually shows itself first.
5. Reset to defaults returns every field to the reference case, which is the quickest way to check whether a surprising result came from the tool or from an input you had changed earlier.

Where this is used

• Process planning — establishing Loose Infill to Order before a trial is booked, so machine time and material in Geosynthetics & Civil Engineering are committed against a calculated figure rather than an estimate.
• Costing and quotation — Loose Infill to Order is an input to the cost sheet, and quoting from a worked number rather than a remembered one is what keeps a margin intact.
• Troubleshooting — when the floor result drifts from plan, entering the measured values (starting with Area to Cover) shows how much of the gap in Loose Infill to Order each variable explains.
• Teaching and study — the accepted ranges bracket normal Geosynthetics & Civil Engineering practice, so moving one variable at a time shows the shape of the relationship rather than a single answer.

Reading the result

Typical bands and what each one is telling you.

Assumptions and limits

• Compacted volume = area x (cell depth + overfill); loose volume = compacted x (1 + allowance); tonnage = compacted volume x compacted bulk density; trucks and panels are rounded up to whole units. Cell walls take a small share of the volume, which this ignores, so the figures err on the side of ordering slightly more. Panel count is plain area division: add for overlaps, stapled joints, cut edges around curves and anchors, and for any area left unexpanded. Panel size, density and bulking come from your supplier, not from this tool. **A quantity take-off, not a design.**
• Every input is bounded to the range normal practice occupies (Area to Cover 1 to 1000000 m², Cell Depth (Height) 25 to 500 mm and Overfill Cover above the Cells 0 to 300 mm, and so on for the rest). Those bounds are guard rails against typing errors, not a claim that the formula fails one unit outside them.
• The calculation is deterministic: the same inputs always give the same result. It carries no allowance for machine condition, operator skill, ambient conditions or lot-to-lot material variation unless an input above explicitly represents one.
• Nothing is sent anywhere. The maths runs in your browser, so the numbers you type never leave the page.

Standards and further reading

• ISO 10318-1, Geosynthetics, Part 1: Terms and definitions, which names the geocell among the geosynthetic products.
• The geocell maker's data sheet sets the expanded panel size, cell depth and wall perforation for each product.
• The project specification sets the infill grading, compaction and any cover depth.

Questions people ask