Grammage is the mass per unit area of paper, typically expressed in grams per square meter (g/m²). To convert from pounds per 1000 square feet (lb/1000ft²) to g/m², multiply the value by 4.8824.
Here, we present tables of conversion factors between customary and SI units for key paper-related measurements. Use these references to ensure accurate and consistent calculations in your paper projects.
View and download our information on customary units to SI units
Discover how paper is made. Read a step-by-step guide to our recycled fibre papermaking process, including how paper is dried, the paper winding process and pulp preparation.
Grammage is the mass per unit area of paper, typically expressed in grams per square meter (g/m²). To convert from pounds per 1000 square feet (lb/1000ft²) to g/m², multiply the value by 4.8824.
To convert thickness from millimetres (mm) to micrometres (µm), multiply by 1000. For example, 0.5 mm × 1000 = 500 µm.
To convert paper strength from kilograms-force per square centimetre (kgf/cm²) to kilopascals (kPa), multiply by 98.0665. For example, 10 kgf/cm² × 98.0665 = 980.67 kPa.
Grammage (g/m²) measures the mass of paper per unit area. Basis weight is typically expressed in pounds per ream (lb/ream) or pounds per 1000ft². Different regions use different conventions, but both measure paper mass.
The conversion tables provide simple multipliers to convert between units. Find the property you want to convert (e.g. grammage or thickness), then use the “Multiply By” value in the table to convert it to the desired unit.
Yes, industry standards recommend using SI units for consistency and accuracy. Common conversions include g/m² for grammage, µm for thickness, and kPa for strength.
Using the correct units ensures that you meet product specifications, maintain consistent quality, and avoid costly errors in production and packaging.