Fabric Consumption Calculator
Calculate fabric consumption per piece for knit and woven garments. Free, instant, no signup needed.
How Fabric Consumption is Calculated
Fabric consumption tells you how much raw material a garment needs before you place your fabric order. Getting it right means you order enough without sitting on excess stock. Getting it wrong means either a shortage that delays production or dead inventory that eats into margins.
The standard formula used across Tiruppur and most Indian knit garment clusters is:
Consumption (kg/piece) = (Marker Length in m x Fabric Width in m x GSM) / 1000 x (1 + Wastage %)
Marker length is the total length of all garment components as they would appear in the cutting layout: front body, back body, sleeves, neck rib, pocket, and any other panel. GSM (grams per square metre) converts the fabric area into weight. Wastage accounts for marker gaps, selvedge trimming, fabric faults, and end-bit losses that are part of every real cutting operation.
For a typical 180 GSM knit T-shirt with a 220 cm marker length on 160 cm open-width fabric, this comes to roughly 0.65-0.73 kg per piece depending on size and wastage allowance. Heavier GSM fabrics or larger garments will consume proportionally more.
Frequently Asked Questions
How do you calculate fabric consumption for knit garments?
Fabric consumption for knit garments uses the formula: Consumption (kg per piece) = (Marker Length in metres x Fabric Width in metres x GSM) / 1000, plus a wastage allowance. Marker length is the total of all garment component lengths as laid out on the cutting table. For a knit T-shirt, this typically includes front body, back body, two sleeves, neck rib, and pocket. Standard wastage for knit garments is 15-20%.
What is the standard wastage allowance for garment cutting?
Knit garments typically have 15-20% wastage, which accounts for marker gaps between pattern pieces, selvedge trimming, fabric faults, end-bit losses, and shrinkage. Woven garments run lower at 10-15% due to better marker efficiency. The actual percentage depends on garment complexity, fabric width, and how efficiently the marker is planned.
How does GSM affect fabric consumption?
GSM (grams per square metre) is the weight of the fabric per unit area. Higher GSM means heavier fabric per square metre. A garment cut from 180 GSM fabric will consume about 30% more weight than the same pattern in 140 GSM, even though the fabric area required is identical. This is why fabric consumption is always expressed in kg, not metres, for knit garments.
What is marker length in fabric consumption?
Marker length is the total length of fabric needed to lay out all the pattern pieces for one garment. It is determined by adding up the lengths of each component (front body, back body, sleeves, ribs, pockets) as they would be arranged on the fabric during cutting. For a basic knit T-shirt, a typical marker length is 200-240 cm depending on size and style details.
What is the fabric consumption formula for woven garments?
The weight-based formula is the same: (Marker Length m x Fabric Width m x GSM) / 1000 x (1 + Wastage%). For wovens, consumption is sometimes expressed in metres instead of kg, using: Metres per piece = Marker Length / Marker Efficiency. Typical marker efficiency for woven garments is 80-85%. Woven fabrics generally have lower wastage (10-15%) because their dimensional stability allows tighter marker planning.