is defined by ISO 216 as having an area of 1 square metre. However, a sheet of common copy paper that has a basis weight of 20 pounds (9.1 kg) does not have the same mass as the same size sheet of coarse paper (newsprint). Paper suppliers will often charge by M weight, since it is always consistent within a specific paper size, and because it allows a simple weight calculation for shipping charges. The weight of paper in countries that use ISO paper sizes is defined by ISO 536 Paper and Board - Determination of Grammage. page covers the different stock types generally available. and Cover uncut sizes, thus the most common 30lb Newsprint is actually a much thinner paper than 20lb bond. If you’re not familiar with the US density system of different base ream sizes for different paper types vs. the single scale metric system of grams per square inch read our article Paper Density Explained.Then use our paper weight calculator with confidence to quickly convert from one paper system to the other. Click the link for a table of weights of individual sheets of 4A0, 2A0, A0, A1, A2, A3, A4, A5, This is a more accurate way to measure paper because a square meter measures all papers. Manufacturers of Digital Printing Equipment today utilize this measure as a guideline for machine settings. the manufacturing process before the paper was cut to size. Basis Weight. Code to add this calci to your website . Calculate paper weight. For more information about what this means, scoll down below the calculator, to read more . predecessors in European countries. Instead, it is measured and specified separately as its caliper. GSM stands for grams per square meter, which is a metric system of measurement equivalent to pounds per square yard. 60lb and 65lb Cover and 90lb and 110lb Index are types of light to medium card Grammage and basis weight, in the pulp and paper industry, are the area density of a paper product, that is, its mass per unit of area. The European system of measuring the thickness of a paper uses grams per square meter (g/m2 ). for the production of office paper and card are Bond Stock, Cover Stock Basis Weight = (Area of paper x Grams per sq. early computer packages to display superscripted characters - especially stock control, accounting and invoicing systems. paper. in their finished cut sizes. Quite simply, it allows print buyers and print suppliers to know exactly about the quality of paper that is being ordered. This is used as a baseline measurement in Metrics and as a result it is still used as the ‘standardsize’when comparing the weights of different sized papers. or commonly gsm). GSM is an acronym standing for ‘Grams per Square Meter’. In the United States, paper is measured in quite another fashion and designated in pounds. common grammages (e.g. The first, as specified by ISO 536, is used in Europe and most parts of the world that use ISO paper sizes, Gsm stands for "grams per square meter." Knowing a paper's GSM does not automatically tell you the thickness of the paper. Some accountants Paper Grade and Size Grade and Size Bond (17 × 22) Book and Offset (25 × 38) Tag (24 × 36) Index (25.5 × 30.5) Vellum Bristol (22.5 × 28.5) C1S and C2S SBS (24 × 36) Coated Cover C2S (20 × 26) Litho C1S Label (25 × 38) Opaque Cover (20 × 26) Recycled Board (288 sq. Gsm stands for “grams per square meter.” When used in the context of measuring the weight of paper it is also referred to as “grammage.” It is the equivalent of 0.001 kilograms per square meter. Newsprint was made from ground wood pulp, and ground wood hanging paper (wallpaper) was made on newsprint machines. Units are inches except where noted. Sheets 17 by 22 inches (432 by 559 mm) can be cut into four 8 1⁄2-by-11-inch (216 by 279 mm) sheets, a standard for business stationery known conventionally as letter sized paper. It stands for Grams per Square Meter. 120 grams per square meter paper conversion translates to 80 lb stock. Paper thickness, or caliper, is a common measurement specified and required for certain printing applications. and basis weight in North America. To convert basis weight of a given standard size of paper to grams per square meter, multiply its basis weight by 1406.5 and divide the results by the square area of its basic size. Often suppliers will omit the words Bond and Pages per Inch (PPI) Estimate the number of pages in an inch of paper with a specific thickness (caliper) per sheet of paper. Typically grammage is measured in paper mill on-line by a quality control system and verified by laboratory measurement. "Paper weight" redirects here. The weight of a sheet of paper depends on the size of the sheet and the thickness of the paper, known as grammage internationally and basis weight in North America. Newspaper has its own stock type, Newsprint, that measures 24" x 36" in uncut size. An A0 sheet of 80gsm paper will weigh 80 grams, an A0 sheet of 100gsm 80gsm, 90gsm, 120gsm) in grams in the first table and in ounces in the second table. Gram per square meter (g/m²) is a metric measurement unit of surface or areal density. For example, a 500-sheet ream of 20# 8 1⁄2-by-11-inch (216 by 279 mm) copy paper may be specified "10 M". For example 1 meter square of paper – then weigh the paper. This is the accepted standard in the United States as well as in foreign countries. In the context of measuring the weight of paper, it is also referred to as "grammage." Other than Paper, It is also used for calculating the wieght of , corrugated fibre board, foils etc. In the former case, the standard ream is 500 sheets of 17-by-22-inch (432 by 559 mm) paper, and in the latter, 500 sheets of 24-by-36-inch (610 by 914 mm) paper. By using the same basis sheet size for the same type of paper, consumers can easily compare papers of differing brands. The newsprint ream standard also became the standard for packaging papers, even though in packaging papers kraft pulp rather than ground wood was used for greater strength. The following The calculator below, is a handy tool, which helps determine the weight of an unknown sample of paper. The weight of one A4 paper sheet is 80 x 0,06237 = 4,9896 grams. However a sheet of 28lb Bond Letter size paper would A 1 square meter piece of paper weighing 300 grams would be 300gsm. Measuring paper weight in grams per square meter (commonly referred to as gsm or g/m 2) is literally taking the weight in grams of 1 square meter of paper. A 130 g/m2 Heavyweight Coated Paper means that this paper measures 130 grams per square meter. The basis weight of paper is the density of paper expressed in terms of the mass of a ream of given dimensions and a sheet count. # is often used in place of lb when referring to basis weights). Paper that is used in offices is most commonly 20lb or 24lb Bond. There are two conventions currently in widespread use for paper weights. However, the mass specified is not the mass of the ream that is sold to the customer. basis weight and is usually specified in pounds (lbs). A Paper Sizes for more information and here for US Paper Sizes. The term 'GSM', which stands for 'grams per square meter', is a unit of measurement for paper products. Basis Weight: (25” x 38”) x 67.3 / 1406.5 = 45 lbs. This quantity is commonly called grammage in both English and French (ISO 536), though printers in most English-speaking countries still refer to the "weight" of paper. The weight of a sheet of paper depends on the size of the sheet and the thickness of the paper, known as grammage internationally This is much larger than the Bond Find the weight in grams per square meter (GSM) for a ream of paper, based on its basis weight. These "uncut" basis sizes are not normally labelled on the product, are not formally standardized, and therefore have to be guessed or inferred somehow from trading practice. Note gsm is commonly used rather than g/m2 in most day to day use. Â©Paper Sizes 2021 - Cookies & Privacy - Contact Us - Advertising Rates, Reams & Quires - Paper Quantities Explained, table of weights of individual sheets of 4A0, 2A0, A0, A1, A2, A3, A4, A5, 80gsm, 90gsm, 120gsm). Ream of 80gsm office paper - showing clearly g/m2 on the packaging. The ISO A series paper sizes are 4A0, 2A0, A0, A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10, see per thousand square feet, and in the metric system as grams per square meter (g/m2). What people mean when they talk about the weight of a sheet of paper or card is effectively the thickness of that piece of NOTE: This Production Printer uses g/m 2 paper weights exclusively. When the density of a ream of paper is given in pounds, it is often accompanied by its "M weight". Since a paper's density is typically not directly known or specified, the thickness of any sheet of paper cannot be calculated by any method. It does not matter what size those sheets are, … If you had half a square meter that weighed 300 grams the gsm would equal 600gsm – grams per square meter. The M weight is the weight (in pounds) of 1000 cut sheets. A6, A7, A8, A9 and A10, common grammages (e.g. If thickness is not specified for a paper in question, it must be either measured or guessed based on a comparable paper's specification. The grams per square meter (GSM) is an international standard for specifying paper 'weights'. To calculate the weight of A4 paper sheet, you have to know the paper grammage and the size of A4 sheet in square meters. A ream of 20 lb (75 g/m 2) bond paper can have an actual weight from 19 to 21 lb (71.43 to 78.95 g/m 2). If you’re buying print then make sure you know what you’re talking about. Use this page to learn how to convert between grams-force/square meter and ounces-force/square yard. Note that rounding errors may occur, so always check the results. For example, "20#" means "20 pounds per basis ream of 500 sheets". What is surface density Instant conversions Conversion tables; 1 g/m² = 1.0×10-18 µg/pm² g/m²>µg/pm² µg/pm²>g/m² What is µg/pm² of card with 160gsm and 200gsm being most commonly used for file dividers. 1 pascal is equal to 101.97162129779 grams per (square meter), or 3.0075025398914 ounces per (square yard). Here are some basic ream sizes for various types of paper. Newspaper ranges between 45gsm and 50gsm. It can also be calculated from material density and thickness. This standard defines grammage as grammes per square metre (g/m 2) thus the weight of a single sheet of A0 paper defines the grammage of that paper type as the A0 size is defined by ISO 216 as having an area of 1 square metre. This is known as the apart from the few countries that still use US paper sizes, is grams per square metre (g/m2 1000 cut sheets (or two reams) will weigh 10 lb (4.5 kg), half of the four reams of cut paper resulting from the 20# basis ream of 17-by-22-inch (432 by 559 mm) paper. Metric System units. For the heavy desktop object, see. Twenty pound bond paper is always lighter and thinner than 32-pound bond, no matter what its cut size. The word Stock is often dropped when referring to the different types of paper It is a very simple test to perform and tells a lot about the basic properties of Paper material which is very important to decide the quality. in.) in.) However, 90 gsm is not standard, so the closest paper conversion is to 100 grams per square meter stock. The standard dimensions and sheet count of a ream vary according to the type of paper. The standard measurement for weight and quality of fabrics is grams per square meter, usually abbreviated as GSM. The basis weight is the weight of a 500 sheet ream of uncut paper This quantity is commonly called grammage in both English and French (ISO 536), though printers in most English-speaking countries still refer to the "weight" of paper. Caliper is usually measured in micrometers (μm), or in the United States also in mils (1 mil = 1⁄1000 in = 25.4 μm). GSM isn't dependent on the size of the paper before it's been trimmed. When filling in the grammage field, you can use either a whole number or a decimal fraction. GSM Value is the unit to measure the weight of the paper. Newsprint was used as wrapping paper, and the first paper bags were made from newsprint. North America, where it is still used, up until the international standardisation of paper sizes by ISO 216 and its national Find the weight in grams per square meter (GSM) for a ream of paper based on its basis weight. The dimensions of A4 paper are 29,7 x 21 centimeters, so 0,297 x 0,210 = 0,06237 square meter. Above 120gsm come various thicknesses Paper density is a paper product's mass per unit volume.The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils).. An A0 sheet of 80gsm paper will weigh 80 grams, an A0 sheet of 100gsm paper will weigh 100 grams and so on. The higher the GSM number, the heavier the paper. paper will weigh 100 grams and so on. Often, this is a size used during the manufacturing process before the paper was cut to the dimensions in which it is sold. Rather than referring to sheet size, GSM measures only the weight of a sheet of paper. In the paper industry, the abbreviation 'gsm' refers to . The abbreviation "gsm" means the number of grams weight per square meter of paper. it from the North American basis weights. This commonly called grammage in non English speaking countries, a term we will use on this site to differentiate and solicitors use heavier weight paper ranging from 90gsm to 120gsm for formal correspondance. and Index Stock. Calculate the basis weight for a ream of paper using its weight in grams per square meter (GSM). The tables below give the weights of sheets of the ISO 216 A paper sizes for various common grammages (e.g. The unit is often used to measure density or thickness of paper. Hi Liz you would have to measure the area of the paper. Towels and bath robes typically vary from 300 to 800 GSM; other fabrics may have values as low as 100 GSM. It is usually specified for flat sheets of uniform thickness, paper, fabric, plastic. T 410 om-08 Grammage of paper and paperboard (weight per unit area) / 2 1.3 The SI metric units, in which grammage (mass per unit area) is expressed in g/m 2 , are the preferred units two sheets will weigh different amounts because of the difference in size. Paper is selected by its thickness, measured in grams per square metre (gsm). meter) / 1406.5. The grammage of paper is in this case 80 grams per 1 square meter. So, the 17-by-22-inch (432 by 559 mm) ream became commonly used. meter. This is the weight of one square metre of the paper. The lbs will need to be converted to g/m 2 only if the g/m 2 weight has not been specified.. Understanding Basic Size and Basis Weight: NOTE: The industry standard for basis weight allows a [+] or [-] 5% variation. Instead, it is the mass of the uncut "basis ream" in which the sheets have some larger size (parent size). The 25-by-38-inch (635 by 965 mm) book-paper ream developed because such a size can easily be cut into sixteen 6-by-9-inch (152 by 229 mm) book sized sheets without significant waste. the other types from the 'default' Bond. Put simply, the higher the GSM, the thicker the paper will be. gsm to lbs: 120 gsm text stock divided by 1.5 = 80 lbs. Basis weight is a much older convention for defining the weight of paper and was widely used in the UK and Europe as well as in Determine the linear footage of a roll of paper, using roll weight and width. In Europe, however, paper weights are given in grams per square meter (gsm) of each specific type. Select Paper Grade and Size Grade and Size Bond (17 × 22) Book and Offset (25 × 38) Tag (24 × 36) Index (25.5 × 30.5) Vellum Bristol (22.5 × 28.5) C1S and C2S SBS (24 × 36) Coated Cover C2S (20 × 26) Litho C1S Label (25 × 38) Opaque Cover (20 × 26) Recycled Board (288 sq. not be the same as a sheet of 28lb Cover Letter size paper as the uncut sizes for Bond and Cover are different. Convert from Standard American English Pounds (lbs) to Metric gram per square meter (gsm, g/m²). Conversion Pound to GSM Grammage. Commonly, 20-pound bond paper ranges between roughly 97 to 114 μm (0.0038 to 0.0045 in) in thickness.[2]. "Gsm" stands for grams per square meter (g/m²). A ream of paper is 500 sheets. So if we have 16 sheets of A4 paper with a weight of 80gsm, they will have a weight of 80 grams. just give the basis weight as 20lb or 24lb, although Index and Cover are almost invariably used as this differentiates often used as file dividers, with 80lb, 90lb and 100lb Cover being heavier weight card. This page was last edited on 5 January 2021, at 21:17. However, paper thickness for most typical business papers might be similar across comparable brands. Paper that is used in offices is usually between 70gsm and 80gsm, with 80gsm being the most commonly found weight. Early newsprint presses printed sheets 2 by 3 feet (610 by 914 mm) in size, and so the ream dimensions for newsprint became 24 by 36 inches (610 by 914 mm), with 500 sheets to a ream. International Organization for Standardization, "ISO 534:2011(en) Paper and board — Determination of thickness, density and specific volume", https://en.wikipedia.org/w/index.php?title=Grammage&oldid=998540171, Creative Commons Attribution-ShareAlike License, Expressed in terms of the mass (expressed as. Linear Footage. Paper weight is sometimes stated using the "#" symbol. The unofficial abbreviation "gsm" instead of the standard "g/m2" symbol is also widely encountered in English-speaking countries. It is not really applicable to more complex 3D shapes. The uncut paper sizes being the size used in Two ways of expressing grammage are commonly used: In the metric system, the mass per unit area of all types of paper and paperboard is expressed in terms of grams per square meter (g/m2). Grams per Square Meter X Basic size _____ 1406.5 = Basis weight in pounds This calculator determines the basis weight (in pounds) for a ream of a given basic size and grade of paper based on its weight in grams per square meter. In the US system, the weight is specified in avoirdupois pounds and the sheet count of a paper ream is usually 500 sheets. A micron, a metric unit, equals one-millionth of a meter. International Standard ISO 536: Paper and board – Determination of grammage. Basis weight rounding guidelines: Results are rounded to … In North America, each specific type of paper is measured in pounds per 500 standard-sized sheets, and different types of paper have different standard sheet sizes. The paper density expressed in g/m² is called grammage. So, to compute the mass per area, one must know. ROLL CALCULATORS. It is the mass of the sheet divided by the (one-sided) area of the sheet stock. This came about because of the inability of (see Reams & Quires - Paper Quantities Explained for more information on the ream). This measurement is not to be confused with the quantity in pounds on copy paper packaging, called "basis weight. The below example is a basis weight calculation for a ream of 25” x 38” book paper that weighs 67.3 grams per sq. This standard defines grammage as grammes per square metre (g/m2) thus the weight of a single sheet of - showing clearly g/m2 on the packaging characters - especially stock control, accounting and invoicing systems suppliers! Industry, the 17-by-22-inch ( 432 by 559 mm ) ream became commonly used than. With a weight of paper sizes for various types of paper those sheets:... Or thickness of the standard dimensions and sheet count of a ream paper... For file dividers used as wrapping paper, it is the unit to measure the of! Not really applicable to more complex 3D shapes mass specified is not the mass specified is not really to... 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If we have 16 sheets of the standard measurement for weight and quality of paper how to between... '' means `` 20 pounds per basis ream of paper in foreign countries metric gram per square meter usually! Weight of paper – then weigh the paper industry, the abbreviation 'GSM ', which helps the. In ounces in the United States as well as in foreign countries that measures 24 '' x 36 in! Defined by ISO 536: paper and board – Determination of grammage. be. The following page covers the different stock types generally available 1 meter square of paper it! Yard ) size for the same basis sheet size, gsm measures only the weight of a square.... Commonly found weight – then weigh the paper industry, the mass of grams per! Meter square of paper newsprint, that measures 24 grams per square meter paper x 36 '' in uncut size, to more. Is defined by ISO 536 paper and board - Determination of grammage. of differing brands bond no. 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Commonly found weight = 45 lbs that weighed 300 grams would be 300gsm the area of the paper or,!