Fabric Weight Calculator
From a Bolt's Dimensions to Its Actual Weight
Shipping costs, cutting yields, and fabric pricing all hinge on total weight, but fabric is usually specified by its areal density (GSM, grams per square meter) rather than a total figure. Converting a roll's length and width into an actual weight in kilograms is simple arithmetic once GSM is known, but it's a calculation that gets done constantly across sourcing, freight, and production planning.
The Formula
Area = Length × Width
Weight(g) = Area(m²) × GSM
Weight(g) = Area(m²) × GSM
Where This Matters
- Freight and shipping quotes — carriers price by weight, so converting a roll's dimensions to actual kilograms is a necessary step before requesting a freight quote.
- Comparing fabric options by weight — two fabrics with the same GSM but different roll dimensions will still ship at very different total weights.
- Verifying a supplier's stated weight — cross-checking a delivered roll's actual weight against its stated length, width, and GSM catches under- or over-delivery.
Worked Example
| Step | Value |
|---|---|
| Area (1.5 × 1.5) | 2.25 m² |
| Weight (2.25 × 180 GSM) | 405 g |
| Weight in kilograms | 0.405 kg |
How to Use This Calculator
- Enter fabric Length in meters.
- Enter fabric Width in meters.
- Enter the fabric's GSM (grams per square meter).
- Select Calculate to see total area and weight in grams and kilograms.
Related Calculations
Not sure the GSM? Measure it directly from a sample with the GSM Calculator, or estimate cost from that same weight with the Fabric Cost Calculator.