Ounce per Square Foot (oz/ft²)
Ounces per square foot is 9 times the oz/yd² figure (1 yd² = 9 ft²). It appears in coatings, laminates, roofing and copper foil weights.
Symbol: oz/ft² (ASCII: oz/ft2)
Quantity: fabric weight (mass per unit area, GSM)
SI relation: 1 oz/ft² = 305.1517272739 g/m² (exact)
Derivation: 1 oz/ft² = 28.349523125 g ÷ 0.09290304 m² = 305.1517192 g/m² (exact ratio)
Exact: yes, by definition
Typical uses
- Coated fabrics and laminates
- Copper foil weight (1 oz/ft² ≈ 35 µm)
- Roofing and composites
Convert ounces per square foot to other units
| Conversion | 1 oz/ft² equals | Reverse |
|---|---|---|
| ounce per square foot to gram per square metre | 305.1517273 g/m² | gram per square metre to ounce per square foot |
| ounce per square foot to ounce per square yard | 9 oz/yd² | ounce per square yard to ounce per square foot |
| ounce per square foot to gram per square centimetre | 0.03051517273 g/cm² | gram per square centimetre to ounce per square foot |
| ounce per square foot to pound per square yard | 0.5625 lb/yd² | pound per square yard to ounce per square foot |
Open the Fabric Weight (GSM) Converter to convert any value between all units.
Sources
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "ounce (avoirdupois)".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Ounce per Square Foot (oz/ft²). Retrieved October 25, 2026, from https://scientificconverters.com/units/ounce-per-square-foot/
IEEE
Scientific Converters, "Ounce per Square Foot (oz/ft²)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/units/ounce-per-square-foot/