Gsm To Paper Pounds
Calculator
Results
- Basis weight (lb)
- 81.073056
- Basis sheet area (m²)
- 0.612902
- Weight per sheet (g)
- 73.548239
Design and print results
| Basis weight (lb) | 81.073056 |
| Basis sheet area (m²) | 0.612902 |
| Weight per sheet (g) | 73.548239 |
formula-map diagram
- Basis weight (lb)
- 81.073056
- Basis sheet area (m²)
- 0.612902
- Weight per sheet (g)
- 73.548239
Formula breakdown
Formula
lb = gsm × basis sheet area (m²) × 500 ÷ 453.59237= 81.073056850581
Note
Simplified model: these are standard prepress and typographic relationships computed on nominal values. Real press bulk, paper caliper and shrinkage, ink limits for a given profile, font metrics and binding allowances vary by supplier and by job, so confirm with your printer and a proof before going to press.
More in Design and printing
See all →Frequently asked questions
Why does paper weight have two completely different units?+
GSM (grams per square meter) is the metric standard used almost everywhere outside North America, while the US 'pound' system measures the weight of a ream (500 sheets) at that paper's specific basic size, which varies by paper category (text, cover, bond, etc.).
Why can't I convert GSM to pounds with one simple multiplier?+
Because the pound rating depends on which basic sheet size is used for that paper type — bond paper's basic size differs from cover stock's — so the same GSM converts to a different pound number depending on the category. The calculator needs to know the paper type to convert correctly.
What GSM roughly corresponds to standard copy paper?+
Standard office copy paper is about 75-90 GSM, which corresponds to roughly 20lb bond in the US system. Cardstock and cover papers start around 200 GSM and up, corresponding to 80lb cover or heavier.
I ordered '32lb paper' from a US supplier and got something thin — why?+
You likely received bond-weight 32lb paper, which is meant for text and letterhead, not cover stock — a 32lb bond sheet is much thinner than an 80lb cover sheet despite the pound numbers looking close. Always check the paper category, not just the number.
Does higher GSM always mean better quality?+
No — GSM measures density and thickness, not print quality, finish, or brightness. A heavier sheet feels more substantial and resists show-through, but a lighter, well-calendered sheet can still print beautifully for its intended use.