Free Online Calculators
Calculate weight per sheet and total stack
This calculator tells you how much a single sheet of paper weighs and the total weight of any stack — useful for printing, mailing, and office planning. It uses the paper's grammage (g/m²) along with the sheet size and quantity. Just enter your paper details and get instant results.
The higher-rated cardstock is the heavier one — both are cover-stock ratings, so the larger number means a thicker, stiffer sheet. The lighter grade is common for simple cards and craft work, the heavier one for rigid invitations, tags and covers.
A single letter-size sheet weighs the ream weight divided by the number of sheets in the ream, so you need the basis weight (in lb) or the grammage (in g/m²) plus the sheet area. Enter the sheet size and the paper grade and the per-sheet weight comes straight out.
The higher basis weight is the heavier paper — it has more mass per sheet, feels stiffer and shows less show-through when printed on both sides. The lighter grade is standard copy paper, the heavier one is typical for letterhead and reports.
Multiply the sheet area in square metres by the grammage in g/m² to get the weight of one sheet, then multiply by the number of sheets for the total. For US basis weights, convert the lb rating to g/m² first, since the rating refers to a ream of the paper's parent sheet size, not to letter size.
Weight = area × grammage, with the area in square metres and the grammage in grams per square metre; the result is in grams. For a stack, multiply that figure by the sheet count, and divide by a thousand if you want kilograms.
The lb figure on a paper wrapper is not the weight of the pack you are holding — it is the weight of a ream of the paper's uncut parent sheets. A ream of letter-size sheets cut from that stock weighs considerably less, which is why the basis weight has to be converted before you can judge the actual mass.
That rating describes a heavy stock, but the actual grammage depends on whether it is text or cover paper — the same number means a much thicker sheet in the cover grade. Convert the rating to g/m² for the grade you have, then multiply by the sheet area to get the real weight.
A ream of standard copy paper in letter size weighs noticeably less than the basis-weight number on the wrapper, because that number applies to the larger parent sheets before cutting. Multiply the sheet area by the paper's grammage and then by the sheet count to get the packed weight for postage or shipping.
It feels slightly thicker and crisper than standard copy paper, with a more substantial snap when you hold a single sheet. It is opaque enough for double-sided printing with little show-through, which makes it a common choice for letterhead, resumes and proposals.
Whether you're preparing a mailing, planning a print job, or simply curious about the weight of your office paper, our free paper weight calculator gives you instant, accurate results. Enter the paper's grammage, select the size, and specify the number of sheets – the tool instantly calculates the weight per sheet and the total stack weight. No formulas, no guesswork.
The most common way to measure paper weight is by its grammage, expressed in grams per square meter (g/m²). This tells you how much one square meter of that paper weighs. Standard office copy paper is typically 80 g/m², while premium brochure paper or cardstock can range from 150 to 400 g/m².
The grammage alone doesn't tell you the weight of a single sheet, because that also depends on the paper size. An A4 sheet at 80 g/m² weighs approximately 5 grams, while the same paper in A3 format weighs about 10 grams. Our calculator handles all of this automatically.
Using the calculator is straightforward. Simply fill in three values:
The calculator immediately displays the weight of one sheet in grams and the total weight of the entire stack. Results update in real time as you type.
Knowing the weight of paper is more useful than you might think. Here are the most important real-world applications:
You need to mail a 15-page report printed on standard A4 copy paper (80 g/m²). Each sheet weighs 5 g, so 15 sheets weigh 75 g. Add the envelope (approx. 5–8 g) and you're just under 100 g – fitting within the most economical letter rate in many countries.
A marketing agency orders 1,000 double-sided flyers on 135 g/m² paper, A4 format. That's 1,000 sheets. Each sheet weighs approximately 8.44 g, making the total print run about 8.44 kg – crucial for calculating shipping costs to distribution points.
A standard office printer holds up to 500 sheets of A4 paper. At 80 g/m², that paper tray holds approximately 2.5 kg of paper. This information is relevant for understanding the mechanical load on the printer and the weight of a full paper delivery.
Multiply the grammage (g/m²) by the sheet area in square meters. For A4 (0.0625 m²) at 80 g/m²: 80 × 0.0625 = 5 g per sheet. Our calculator automates this for any size or grammage.
Standard copy paper is 80 g/m², which is suitable for most everyday printing tasks. For higher-quality documents, presentations, or letterheads, 90–120 g/m² is commonly used. Brochures and flyers often use 130–170 g/m².
Yes. In addition to standard formats (A3, A4, A5, Letter, Legal), the calculator allows you to input custom width and height measurements, making it suitable for non-standard paper sizes used in specialty printing.
Absolutely. The calculator is 100% free, requires no sign-up, and works directly in your browser on any device – desktop, tablet, or smartphone.
Paper weight (g/m²) refers to mass per unit area, while paper thickness (measured in micrometers or millimeters) refers to physical depth. Heavier paper is generally thicker, but the relationship isn't linear – paper density and manufacturing process also play a role.