Paper Weight Calculator
Convert between different paper weight measurements: GSM, basis weight, and more.
Paper Weight Conversions
GSM (g/m²):
Text (lb):
Cover (lb):
Bond (lb):
Index (lb):
Bristol (lb):
Points (pts):
Disclaimer: This calculator provides approximate conversions between paper weight systems. Results may vary slightly based on different paper types, manufacturing processes, and regional standards. For critical applications, consult with a professional printer or paper supplier.
About Our Paper Weight Calculator
Our Paper Weight Calculator is a valuable tool for designers, printers, publishers, and anyone working with paper products. It easily converts between different paper weight measurement systems used around the world, helping you understand equivalent weights across various standards.
Understanding Paper Weight Systems
Paper weight is measured in several different ways depending on regional standards and industry practices:
- GSM (Grams per Square Meter): The metric measurement used internationally, representing the weight of paper per square meter.
- Pounds (lb): The imperial system used primarily in North America, representing the weight of 500 sheets of paper in its basic size. This varies by paper type (text, cover, bond, etc.).
- Points (pts): A measurement of thickness, where 1 point equals 0.001 inches.
Common Paper Weight Standards
Basic Size References (for pound weights):
- Bond/Writing: 17" × 22"
- Text/Book: 25" × 38"
- Cover: 20" × 26"
- Index: 25.5" × 30.5"
- Bristol: 22.5" × 28.5"
Key Features:
- Convert between GSM, pounds (various types), and points
- Support for all major paper weight standards
- Precise calculations for professional use
- User-friendly interface for quick conversions
How to Use:
- Enter your known paper weight
- Select the current unit of measurement
- Click "Calculate Conversions" to see equivalent weights in all systems
Common Paper Weight Applications:
20-24 lb Bond / 50-60 gsm: Copy paper, everyday printing
24-32 lb Bond / 90-120 gsm: Letterhead, quality stationery
50-70 lb Text / 80-105 gsm: Brochures, magazines
80-100 lb Text / 120-150 gsm: Posters, premium brochures
65-80 lb Cover / 176-216 gsm: Business cards, postcards
100-110 lb Cover / 270-300 gsm: Book covers, premium cards
This calculator is essential for designers checking print specifications, printers recommending paper stocks, and anyone sending files to print. Make accurate paper weight conversions every time!
Frequently Asked Questions
Why are there so many different paper weight systems?
Different paper weight systems evolved regionally and by industry. GSM (grams per square meter) is the metric standard used globally, while the pound system originated in the United States. The pound system is further complicated because it measures the weight of 500 sheets at each paper type's "basic size," which varies between paper categories. Points (pts) measure thickness rather than weight, adding another dimension to paper specifications.
How do I choose the right paper weight for my project?
The ideal paper weight depends on your specific project. For standard documents, 20-24 lb bond (75-90 gsm) works well. Letterhead typically uses 24-32 lb bond (90-120 gsm). For brochures and flyers, 80-100 lb text (120-150 gsm) provides good durability without being too stiff. Business cards usually use 80-110 lb cover (220-300 gsm). For premium pieces like wedding invitations, consider 110-130 lb cover (300-350 gsm). Always request samples before committing to large print runs.
What's the difference between paper weight and paper thickness?
While related, weight and thickness aren't identical. Paper weight (measured in gsm or pounds) refers to the mass of the paper, while thickness (measured in points, mils, or microns) refers to how thick the actual sheet is. Two papers can have the same weight but different thicknesses depending on how they're manufactured. For example, a calendared (smooth) paper will be thinner than a bulky or textured paper of the same weight.