GSM vs PT for Business Cards: How to Compare Paper Weight Without Guessing

Walk through a few online print shops and you'll see business card weights listed as "32 pt," "400 gsm," "16 pt," or "350 gsm." These are different measurement systems, and converting between them is rarely a clean ratio. Here's how to navigate them.

What gsm means

GSM (grams per square meter) is the weight of a one-square-meter sheet of the paper. Higher gsm = heavier, thicker paper. It's the standard measurement in Europe, Asia, and most of the global print industry.

Common gsm values for business cards:

• 300 gsm — standard, feels adequate but not premium
• 350–400 gsm — the premium sweet spot for most professional cards
• 450–600 gsm — ultra-thick; luxury cards, usually layered or board-mounted

What pt (point) means

PT (point thickness) is a direct measurement of the paper's caliper (physical thickness). One point = 1/1000 of an inch. It's commonly used by US print shops.

Common pt values for business cards:

• 14 pt — standard, comparable to about 300 gsm
• 16 pt — step up, comparable to roughly 350 gsm
• 32 pt — ultra-thick, comparable to premium 600 gsm layered stock

Why the conversion isn't exact

GSM measures weight. PT measures caliper. Paper density varies by fiber content, coating, and manufacturing process — so 400 gsm in one paper grade might be thicker or thinner than 400 gsm in a different grade. A coated stock is denser than an uncoated stock of the same gsm.

The practical upshot: don't try to convert precisely, compare by feel. If you can order a sample, do. If you can't, use these rough equivalences:

| GSM | PT | Feel | |---|---|---| | 300 gsm | ~14 pt | Standard; adequate | | 350–400 gsm | ~16 pt | Premium; most professional cards | | 450–600 gsm | 24–32 pt | Ultra-thick; luxury |

Is higher always better?

Not necessarily. For a personal trainer who hands out cards during sessions, a 300 gsm card that fits easily in a waistband pocket might work better than a 600 gsm slab. For an attorney walking into a client meeting, the heavier card signals quality without being inappropriate.

Match the weight to the context of the hand-off and the impression you want to make. 400 gsm is the right starting point for most professional and premium use cases.