About

Materials like carpet, roofing felt, vinyl flooring, and fabrics are sold by the "running meter" (or linear meter), yet projects are measured in square meters or square feet. A simple area calculation is insufficient for ordering because it ignores the fixed width of the manufacturing roll.

This calculator determines the required linear length based on your total coverage area and the specific width of the product roll. It automatically handles unit cross-conversion (e.g., inputting area in Square Feet but Roll Width in Meters), preventing expensive shortages or excessive waste caused by unit mismatch errors during procurement.

Formulas

The calculation normalizes the area and width to a common unit before division:

Length_linear = Area_totalWidth_roll

Note: This assumes perfect cutting. Real-world estimates should add 10-15% for waste/cuts.

Reference Data

Material Type	Standard Roll Width	100 m² requires:
Carpet (US)	12 ft (3.66 m)	27.3 linear meters
Carpet (EU)	4 m	25.0 linear meters
Vinyl Flooring	2 m	50.0 linear meters
Wallpaper	0.53 m	188.7 linear meters
Roofing Felt	1 m	100.0 linear meters
Fabric (Bolt)	1.4 m (55 in)	71.4 linear meters

Frequently Asked Questions

A linear meter (or running meter) measures the length of a material regardless of its width. For example, buying 5 linear meters of carpet from a 4-meter wide roll gives you 20 square meters of material.

Yes. This tool accepts mixed inputs. You can enter the room area in square feet and the roll width in meters; the tool performs the necessary conversions internally.

This tool calculates the net mathematical length required. Construction best practices suggest adding 10% to 15% to this result to account for pattern matching, cutting errors, and room irregularities.