Paper Weight Calculator
Enter the paper size, sheet count, and GSM to find total weight for shipping, inventory, or equipment planning.
GSM (grams per square meter) is the standard metric measure. Basis weight (e.g., 20 lb bond) can be approximated via references.
A standard ream = 500 sheets.
Common values: copy paper 75–90 gsm, postcard 220 gsm, business card 300 gsm.
Paper Weight Summary
Total weight
4.99 lb
(2.26 kg • 4.99 lb)
Total area
324.7 ft²
(30.16 m² • 324.7 ft²)
GSM
75 gsm
Basis weight reference: 500 lb (Bond (17x22 in))
How to Use This Calculator
Identify paper specifications
Gather the sheet size and GSM (or basis weight). Use weight on the ream wrapper or manufacturer data sheet.
Count or estimate sheets
Enter the exact number of sheets you plan to ship, print, or inventory. Add 5–10% for spoilage if needed.
Review weight for logistics
Use the total mass to plan freight, calculate postage, or ensure equipment can handle the stack.
Formula
Area = Sheet Width × Sheet Height × Sheets
Weight (kg) = (GSM ÷ 1000) × Area (m²)
Weight (lb) = Weight (kg) ÷ 0.453592
Example: 500 sheets of letter paper at 75 gsm → Area = 500 × 0.0548 m² = 27.4 m². Weight = 75 × 27.4 ÷ 1000 ≈ 2.06 kg (4.5 lb).
Understanding Paper Weight
GSM is a direct metric measure. Basis weight depends on the original sheet size the paper was cut from, so 20 lb bond feels thinner than 80 lb cover even if both are “20 lb.”
- Copy paper: 70–90 gsm (20–24 lb bond)
- Brochure: 120–170 gsm (32–45 lb text)
- Postcard: 200–260 gsm (90–120 lb cover)
- Business card: 300 gsm+ (140 lb cover)
Frequently Asked Questions
How do I convert basis weight to GSM?
Multiply basis weight by the ratio of its reference sheet area to 1 square meter. Each grade (bond, book, cover) has a different reference size.
Why does basis weight seem inconsistent?
Because it uses the weight of 500 sheets of a specific parent sheet size. Two stocks with the same basis weight can feel different if their reference sizes differ.
Should I weigh paper on a scale?
Yes for large orders. This calculator provides accurate estimates, but actual weight may vary slightly due to moisture or tolerances.
Can I reverse the calculation?
Absolutely. If you know the weight of a ream, divide by area to derive GSM, then compare with supplier specs.