Square Meters to Linear Meters Converter (Roll Calculator)
Calculate running length (linear meters) from total area and roll width. Essential for purchasing carpet, roofing, or fabric.
About
When purchasing materials supplied in rolls - such as carpet, vinyl flooring, geotextiles, or roofing felt - knowing the total square meterage is insufficient. Suppliers sell these materials by the "linear meter" (or running meter), cut from a master roll of a fixed width. This tool converts your required Area (m2) into the specific Purchase Length (linear m) needed for your project.
This calculation eliminates the "width variable" confusion. For example, covering 20 m2 with a 4m wide roll requires only 5 linear meters. Accurate conversion prevents over-ordering expensive materials or, worse, falling short during installation due to neglecting the fixed constraints of the roll width.
Formulas
The calculation rearranges the standard area formula (Area = Length × Width) to solve for Length.
Constraint:
The result represents the length of material to unroll to achieve the specified coverage area, assuming no waste.
Reference Data
| Material | Common Roll Widths | Typical Use Case |
|---|---|---|
| Carpet (Resid.) | 3.66m (12ft), 4.0m, 5.0m | Bedroom, Living Room |
| Vinyl / Lino | 2.0m, 3.0m, 4.0m | Kitchen, Bathroom |
| Artificial Grass | 2.0m, 4.0m | Landscaping |
| Geotextile | 2.0m, 4.0m, 5.0m | Drainage, Driveways |
| Roofing Felt | 1.0m | Shed, Flat Roofs |
| Wallpaper | 0.53m | Interior Walls |
| Fabric | 1.4m, 1.5m | Curtains, Upholstery |
| EPDM Membrane | 3.0m - 9.0m | Commercial Roofing |