Source: https://packaging.shadenet.co.in/blog/net-roll-weight-and-length-calculator.html

# Net Roll Weight and Length: Calculation Guide

Metres per kilogram equals 1,000 divided by the measured linear weight in grams per metre. For example, a net weighing 8 g/m yields 125 m/kg before allowances. Net mass must exclude the core and packaging. GSM alone is insufficient unless the appropriate developed width or area is also known.

![Packaging mesh rolls for sample comparison](https://packaging.shadenet.co.in/images/fruit-vegetable-packaging-net-rolls-1.webp)

## Use linear weight

Length in metres = net mass in kg × 1,000 ÷ linear weight in g/m. Net mass in kg = length in metres × linear weight in g/m ÷ 1,000. Exclude core and wrapping mass.

## Worked example

A 500 m roll at 8 g/m contains 4 kg of net. At a hypothetical 100 currency units per kg, its material cost is 0.8 per metre. These are arithmetic examples, not a product specification or sales quotation.

## Do not confuse GSM and g/m

GSM measures mass per square metre, while g/m measures mass per metre of roll. Converting requires the relevant developed width or measured area; tubular mesh stretch makes casual conversions unreliable. Confirm measured linear weight with the supplier.

## Next steps

[Request a sample and written quotation](https://packaging.shadenet.co.in/contact.html) or compare the [product range](https://packaging.shadenet.co.in/products.html). For dimensions and load guidance, use the [indicative selection guide](https://packaging.shadenet.co.in/packaging-calculator.html); its presets are not engineering calculations.

## Buyer questions and direct answers

### How many metres of net are in one kg?

Metres per kilogram equals 1,000 divided by the measured linear weight in grams per metre. For example, a net weighing 8 g/m yields 125 m/kg before allowances. Net mass must exclude the core and packaging. GSM alone is insufficient unless the appropriate developed width or area is also known.

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