Basis weight is a key parameter for all paper and paperboard grades. Accurate grade-specific information is needed to calculate many index values.

BW [g/m2] | 10–800 |
BW [lb/3000 ft2] | 6.2–492 |
Measurement according to standards ISO 536, TAPPI T410. Related standards: ASTM D646, BS 3432, DIN EN ISO 536, JIS P 8124, DIN 53104, CPPA D.3.