Grams Per Square Metre To Ounces Per Square Yard Converter
Convert fabric, paper and material weight between gsm and oz/yd2, with project area and total material weight included.
Convert Area Weight
Converted Area Weight
200 gsm converts to about 5.9 oz/yd2.
Quick Answer
To convert grams per square metre to ounces per square yard, divide by 33.9057. A 200 gsm material is therefore about 5.9 oz/yd2. To convert ounces per square yard to gsm, multiply by 33.9057. This unit pair appears in fabric, canvas, denim, leather substitutes, paper, print materials, coated cloth and craft sheets. The conversion only changes the area-weight unit. It does not describe thickness, fibre, weave, coating, finish, absorbency, stiffness, transparency or strength. Two fabrics can have the same gsm and behave very differently when sewn, printed or folded.
Formula And Project Weight
oz/yd2 = gsm / 33.9057gsm = oz/yd2 x 33.9057Total grams = gsm x area in m2Area in m2 = area in yd2 x 0.83612736Total ounces = total grams / 28.349523125The total weight line helps when a roll, cut panel or sheet area is known. For example, 3 m2 of 200 gsm fabric weighs about 600 g before packaging, seams, waste and moisture. A printed vinyl or coated fabric can have a base cloth weight plus coating weight; check which figure the supplier provides. Paper can also be sold by gsm while US cover stock uses pounds, so avoid mixing unrelated paper-weight systems without a separate converter.
gsm To oz/yd2 Table
| gsm | oz/yd2 | 3 m2 Total | Possible Context |
|---|---|---|---|
| 50 | 1.5 | 150 g | Light paper or fabric. |
| 80 | 2.4 | 240 g | Office paper style weight. |
| 120 | 3.5 | 360 g | Light craft sheet. |
| 150 | 4.4 | 450 g | Medium fabric or paper. |
| 200 | 5.9 | 600 g | Default example. |
| 250 | 7.4 | 750 g | Heavier cloth or card. |
| 300 | 8.8 | 900 g | Canvas-style range. |
| 350 | 10.3 | 1,050 g | Heavy material. |
| 400 | 11.8 | 1,200 g | Very heavy cloth. |
| 500 | 14.7 | 1,500 g | Heavy coated product. |
Fabric And Paper Notes
Area weight can help compare broad material classes, but it is not the same as hand feel. A tightly woven 200 gsm cotton can feel firmer than a looser 200 gsm viscose blend. A coated fabric may feel heavier and stiffer than an uncoated cloth with the same base fibre. Paper gsm tells you mass per area, but card stiffness also depends on fibre, finish, calendering and thickness. When the project depends on drape, opacity, fold quality or durability, request a sample rather than relying on gsm alone.
For sewing, order extra material for pattern matching, shrinkage, grain, seam allowances and cutting mistakes. For print work, check printer feed limits and coating compatibility. For tents, banners, covers and upholstery, ask whether the supplier’s oz/yd2 figure includes coating. A conversion can make two listings comparable, but the material data sheet still carries the practical answer.
Worked Examples
| Task | Calculation | Result | Project Check |
|---|---|---|---|
| 200 gsm to oz/yd2 | 200 / 33.9057 | 5.9 oz/yd2 | Round to one decimal for shopping notes. |
| 10 oz/yd2 to gsm | 10 x 33.9057 | 339.1 gsm | Heavy canvas-style value. |
| 4 m2 at 250 gsm | 4 x 250 | 1,000 g | Before waste and packaging. |
| 5 yd2 at 8 oz/yd2 | 8 x 33.9057 x 5 x 0.83612736 | 1,134 g | Convert area first for total weight. |
Buying Samples And Comparing Specifications
Use the conversion to compare listings that use different markets or supplier habits. UK fabric shops often list gsm, while outdoor fabrics, denim and some imported cloth may use oz/yd2. A converted number lets you place both on the same scale, but it should not be the only buying test. Ask for a swatch when opacity, softness, drape, stretch, coating, crease recovery or abrasion resistance matters. A 300 gsm sweatshirt fleece and a 300 gsm canvas can have very different behaviour because the fibres and structure are not the same.
For paper and print, gsm is helpful but incomplete. A 250 gsm sheet can be flexible or stiff depending on fibre, finish and thickness. Printers may also set limits by paper thickness or feed path rather than gsm alone. For shipping, the total weight line can estimate a sheet bundle or fabric order before packaging. Add offcuts, seam allowance, pattern matching, shrinkage, test pieces and supplier minimum order rules before purchasing. The converter gives a common unit; the sample tells you whether the material suits the job.
If two suppliers quote similar weights, ask for the full specification sheet rather than picking the lower price immediately. Width, usable cut length, coating, finish, flame rating, water resistance, wash instructions and batch tolerance may matter more than a one-decimal oz/yd2 result. Keep the converted figure in the order note so later reorders can be matched across suppliers.
| Specification To Compare | Why It Matters | Question To Ask |
|---|---|---|
| Base gsm and coated gsm | Coating can add mass and stiffness. | Does the value include coating? |
| Width of roll | Area weight does not give roll length. | How many square metres are supplied? |
| Shrinkage | Wash or steam can reduce usable size. | Has the fabric been pre-shrunk? |
| Printer limit | Feed systems may reject thick stock. | Is the limit by gsm or thickness? |
FAQs
How do I convert gsm to oz/yd2?
Divide the gsm value by 33.9057. For example, 200 gsm is about 5.9 oz/yd2.
How do I convert oz/yd2 to gsm?
Multiply oz/yd2 by 33.9057. For example, 10 oz/yd2 is about 339.1 gsm.
Is fabric oz the same as fluid ounces?
No. Fabric ounces per square yard is an area weight. It is not a liquid measure.
Does gsm tell me fabric thickness?
No. It tells mass per area. Thickness, drape and stiffness depend on fibre, weave and finish.
Can I use this for paper?
Yes for area weight, but paper stiffness and cover-stock pounds need separate checks.
Why include project area?
It estimates total material mass for a sheet, roll length or cut panel after unit conversion.
Sources
- National Institute of Standards and Technology. (2008). Guide for the Use of the International System of Units. NIST Special Publication 811. https://www.nist.gov/pml/special-publication-811
- International Bureau of Weights and Measures. (2019). The International System of Units (SI), 9th ed. BIPM. https://www.bipm.org/en/publications/si-brochure
- ASTM International. (n.d.). Textile standards. ASTM International. https://www.astm.org/