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Linear Meters per kg Calculator

Calculate running length available from one kilogram of film at a given width and GSM. Use it to connect weight-based purchasing with length-based machine consumption.

Use a saved product specification (optional)
01 / INPUTS

Enter your values

First time using this calculator?

Replace the example values with figures from your supplier sheet or measurements. Choose the unit beside each value. Results update as you type; fix any highlighted field before using the result.

GSM means grams per square metre. Net weight excludes the core and other packaging. MOQ means the minimum order quantity. An optional field can stay blank unless the result you need depends on it.

Prices keep the selected currency; changing its label does not convert an exchange rate. Save or export the result after checking your inputs.

Help with web width

Measure the full width of the flat material from edge to edge, rather than the width of one finished pack. Choose the matching unit.

g/m²

Use actual supplier or measured GSM when available.

Help with film gsm

GSM is the weight of one square metre of material, in grams. Find it on the supplier specification; use the complete laminate value for layered film.

Results update as you edit. Nothing is saved until you choose to.
02 / RESULTExample result — replace the inputs

Linear meters per kg

15.63 m/kg
Weight per meter0.0640 kg/m
THE CALCULATION

Meters/kg = 1,000 ÷ (width (m) × GSM)

1,000 ÷ (0.8 × 80) = 15.625 m/kg
Example result — replace the sample valuesThe formula works, but the values are illustrative.

Saved calculations stay in this browser. No account or cloud backup is created.

Save to a product project (optional)Choose or create a saved product project ↗

This is an illustrative example. Saved or transferred values must be checked against your job.

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Calculated from your inputs. Confirm specifications with your supplier.

How sensitive is this result to your assumptions?

Vary one input and inspect linear meters per kg

All other entered inputs stay fixed. Ranges are your scenarios, not statistical confidence or supplier performance predictions. This uses the same validated calculator engine.

UNDERSTAND THE CALCULATION

The formula, made clear.

Linear m/kg = 1,000 ÷ (Width in metres × GSM)

One running metre has an area equal to the web width in metres. Multiplying by GSM gives grams per running metre, and dividing 1,000 grams by that mass gives running metres per kilogram. A narrower slit web therefore provides more running length from the same mass than a wider web of identical GSM. That does not change the square-metre yield, which depends only on basis weight.

How to use this calculator

  1. 01

    Enter the full width of the roll being purchased or consumed.

  2. 02

    Supply the GSM of its complete film structure.

  3. 03

    Use the resulting length yield to estimate running metres from a known net weight.

WORKED EXAMPLE

A calculation you can check

The example finds the running metres represented by one kilogram of a specified slit film web.

Web width
800 mm
Film GSM
80 g/m²
1,000 ÷ (0.8 × 80) = 15.625 m/kg
Linear meters per kg15.63 m/kg
HOW TO VERIFY THIS RESULT

Check the displayed formula and units against your quotation. Use measured GSM, net weight and actual layout dimensions where available. Default densities are planning assumptions, not certified material properties. Calculated cost does not certify strength, compatibility or safe loading.

Method, units and material assumptions ↗