Denim GSM to Fabric Weight Calculator

A denim gsm to kg per meter calculator with oz-per-square-yard conversion for buyers. Use the free Denim GSM to Fabric Weight Calculator below — enter your values and get instant results, right in your browser. Weight per meter (kg) = GSM × width (m) ÷ 1000. Oz per sq yard = GSM ÷ 33.906. Weight per gaz (kg) = GSM × width (m) × 0.9144 ÷ 1000. Example: 340 GSM × 58" (1.473 m) → 0.501 kg/m = 10.0 oz/yd².

How to use the Denim GSM to Fabric Weight Calculator

Denim is bought and sold by weight — GSM on the lab report, kg per meter on the invoice, oz per square yard in the American buyer's spec sheet. This denim gsm to kg per meter calculator converts between all three from your fabric's GSM and width. Whether you are costing jeans production, checking a supplier's claim, or converting a buyer's tech pack, the numbers reconcile instantly.

  1. Enter the fabric GSM from the lab report or supplier (340 GSM is typical mid-weight denim).
  2. Enter the fabric width in inches (58" is standard for denim).
  3. Click Calculate to see kg per meter, oz per square yard, and kg per gaz.
  4. Compare the kg/m figure against your supplier's invoice weight to catch short-weight deliveries.
  5. Use the oz/yd² figure when replying to US/EU buyer tech packs.

Formula

Weight per meter (kg) = GSM × width (m) ÷ 1000. Oz per sq yard = GSM ÷ 33.906. Weight per gaz (kg) = GSM × width (m) × 0.9144 ÷ 1000. Example: 340 GSM × 58" (1.473 m) → 0.501 kg/m = 10.0 oz/yd².

Worked example

A 12 oz denim is 12 × 33.906 = 407 GSM. On 58-inch (1.473 m) width it weighs 407 × 1.473 ÷ 1000 = 0.600 kg per meter, or 0.548 kg per gaz. A 100-meter roll therefore weighs about 60 kg — the figure your freight forwarder needs.

Frequently asked questions

Multiply oz by 33.906: 12 oz = 407 GSM. Common conversions: 10 oz = 339 GSM, 13 oz = 441 GSM, 14 oz = 475 GSM. Heavier GSM means a sturdier, more premium-feeling jean.

Cut a 10 cm × 10 cm swatch, weigh it in grams, and multiply by 100 — that is your GSM. Compare with the ordered spec; ±5% is the normal industry tolerance.

Ounces per square yard is the traditional US denim trade unit, while GSM is the metric standard used in Pakistani mills. Both describe the same weight — this calculator converts either way.

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