How Much Does a Roll of Fabric Weigh?

A roll of fabric is heavier than it looks, and the weight matters more often than you might expect: for a courier quote, for checking that a delivery matches the invoice, for working out whether one person can lift it onto a cutting table, or for comparing a price per kilo with a price per metre. You do not need to weigh the roll to know roughly what it weighs. Three numbers are enough: the fabric's weight per square metre (GSM), its width, and the length on the roll. This guide shows the arithmetic, works through three examples with the Fabric Weight from Dimensions tool, and lists what the calculation leaves out.

The formula

A fabric's GSM is its mass per square metre, so the weight of any flat piece is its GSM multiplied by its area:

total weight (g) = GSM × length (m) × width (m)

Widths are usually quoted in centimetres, so divide by 100 first: a 150 cm roll is 1.5 m wide. The tool takes the width in centimetres and does the conversion for you. It also reports a second figure that is often more useful than the total: the weight of one running metre, which is GSM × width in metres. That is the number that tells you what a metre cut from the roll will weigh, whatever the roll length.

If your supplier quotes weight in ounces per square yard, convert it to GSM first with the Fabric Weight Converter. Multiplying ounces by metres gives a meaningless answer.

Example 1: a 50 m roll of 200 GSM cloth, 150 cm wide

This is a common shape of roll for a mid-weight woven, such as a cotton twill or a light canvas.

• Area: 50 m × 1.5 m = 75 m²
• Total weight: 15,000 g, or 15 kg
• Per running metre: 300 g

Fifteen kilograms of cloth is comfortable to carry, but the cardboard tube and wrapping add more on top. Tubes vary a lot, so if you need the shipped weight rather than the fabric weight, weigh an empty tube of the same kind or ask the supplier.

Example 2: a 100 m roll of 120 GSM shirting, 145 cm wide

Lighter fabric, but twice the length.

• Area: 145 m²
• Total weight: 17.4 kg
• Per running metre: 174 g

Note that this roll weighs more than the first one even though each square metre is lighter. Length and width count just as much as GSM. That is the most common surprise when people guess roll weights from how a fabric feels in the hand.

Example 3: wide sheeting, 150 GSM at 280 cm

Bed-linen fabrics are often woven extra wide so a sheet or duvet cover can be cut without a seam. Take a 100 m roll of 150 GSM sheeting at 280 cm:

• Area: 280 m²
• Total weight: 42 kg
• Per running metre: 420 g

A 42 kg roll that is nearly three metres long is a two-person or a mechanical lift. If you are planning a delivery or a workroom layout, this is the calculation to run before the roll arrives.

Weight per running metre: the figure you will use most

Because it does not depend on the roll length, weight per running metre is handy in several everyday situations:

• Checking a cut. If a 3 m cut of the 120 GSM shirting above should weigh about 3 × 174 g = 522 g and it weighs noticeably less, it may be short, or the cloth may be lighter than specified.
• Comparing widths. One running metre of 150 GSM cloth weighs 168 g at 112 cm wide and 225 g at 150 cm wide. The wider cloth costs more per metre partly because there is simply more of it.
• Converting a price per kilo. Knits and some deadstock are sold by weight. Knowing the grams per running metre turns a price per kilo into a price per metre. There is a separate guide to that conversion.

Going the other way: how long is the roll?

If you know a roll's net fabric weight but not its length, the same relationship runs backwards: length = weight ÷ (GSM × width). A 15 kg roll of 200 GSM cloth at 150 cm should hold about 50 m, as in the first example. This is a useful check on a roll whose label has gone missing, but it is only as good as the GSM figure. Fabric GSM varies within a tolerance from roll to roll, often a few percent either way, and a 5% error in GSM becomes a 5% error in the length estimate. Measure the roll if the length matters.

Measuring the GSM if you do not know it

Cut a few 10 cm by 10 cm squares (0.01 m² each) from across the width, avoiding the selvedges, weigh them on a scale that reads to 0.1 g, average them, and multiply by 100. A square that weighs 2.0 g means a 200 GSM fabric. Weigh the cloth as it will be used. Off-roll fabric may carry finish that washes out, and fabric absorbs moisture from the air, so readings on a humid day can run a little high. For a contract or a dispute, a textile laboratory will condition and weigh samples to a standard test method.

What the calculation leaves out

The tool multiplies a uniform GSM by a rectangle. Real rolls differ from that in several ways:

• The tube and packaging are not included. Cardboard and plastic tubes range from a few hundred grams to several kilograms on long, wide rolls.
• Selvedges are often a little heavier or lighter than the body of the cloth, and the quoted width may be the total width or the usable width. Use the same width the GSM was measured against.
• Moisture regain varies by fibre. Cotton, wool and viscose take up noticeably more water from the air than polyester, so a roll of a natural fibre can gain or lose weight with the weather.
• Coated and laminated fabrics may be quoted as base cloth weight only. Check whether the GSM includes the coating before you rely on the total.
• Tolerances. A mill's quoted GSM is a nominal value with an allowed variation, so the true roll weight can sit a few percent either side of the calculated figure.

None of these makes the calculation useless. For planning, costing and sanity-checking, GSM times area is the right starting point; it simply is not a substitute for weighing when the exact figure is contractual.

Safe handling

Long rolls are awkward as well as heavy, because the weight sits a long way from your hands. If a calculated roll weight is above what you would comfortably lift alone, plan for two people or a roll stand, keep the roll horizontal, and do not stand rolls on end where they can topple. Workplaces have their own manual-handling rules, and those take precedence over any rule of thumb here.

Summary

Roll weight is GSM times length times width, with the width in metres. The dimensions tool gives you both the total and the weight per running metre, which is the more useful figure for cuts, comparisons and pricing. Add the tube and packaging if you need the shipped weight, and remember that the answer is only as precise as the GSM you put in.