Meter ↔ Kilogram (Roll) Converter

From weight and width, find a roll’s metres ↔ kilograms. Free, no sign-up; the formula used is shown openly on the page.

Formula

Weight per metre (g) = GSM × width(m). Weight (kg) = length(m) × GSM × width(m) ÷ 1000. Length (m) = weight(kg) × 1000 ÷ (GSM × width). Enter either length or weight; the other is computed.

Worked example

180 g/m², 1.5 m width, 1000 m → per metre 180 × 1.5 = 270 g; total 1000 × 270 ÷ 1000 = 270 kg. Conversely 270 kg → 270 × 1000 ÷ 270 = 1000 m.

Input → output examples
Weight (g/m²)	Width (m)	Length (m)	Weight per metre (g/m)	Total weight (kg)	Total length (m)
150	1.6	1000	240	240	1,000
220	1.8	1000	396	396	1,000
320	1.5	500	480	240	500

Frequently asked questions

How many metres is 1 kg of fabric?

Length = 1 × 1000 ÷ (GSM × width). E.g. at 180 g/m² and 1.5 m width: 1000 ÷ 270 = 3.70 m/kg.

How do I find roll weight?

Weight (kg) = length × GSM × width ÷ 1000. Weight per metre = GSM × width (g).