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    Table of Contents

    Galvanised iron sheets, popularly known as GI sheets are known for their durability and resistance to corrosion. They are commonly used in manufacturing and construction, especially for outdoor applications. In India, GI sheet weight varies based on GI sheet size and thickness. The use of a GI sheet weight calculator therefore is recommended for precise budgeting and project planning. You can also use a GI sheet weight chart for estimating weight and pricing. On an average, GI sheets are priced at ₹250 to ₹400 per square meter.

    Let’s understand GI sheet full form, how GI sheet weight is calculated, what are the different GI sheet standard sizes, and how to study a GI sheet weight chart for planning your project requirements.

    Disclaimer: This article is for information purpose only. It focuses on the method of GI sheet weight calculation to enable professionals prepare GI sheet weight charts for their reference. You are advised to check with your steel seller/manufacturer for accurate sizes, dimensions, weight and other details.

    Also read: What is galvanised steel?

    How to calculate GI sheet weight?

    As a business owner, project engineer, builder or other professionals working with GI sheets, it’s essential that you accurately calculate GI sheet weight for your project.

    Formula for GI sheet weight calculator:

    Weight (kg) = Length (m) x Width (m) x Thickness (mm) x Density of steel (galvanised)

    Here,

    Density of steel = 7.85 (standard factor for measurement)

    GI sheet full form: Galvanised iron sheets. Manufactured through a process of hot-dipping iron or steel in molten zinc, GI sheets have a protective layer that guards against environmental damage.

    GI sheet weight calculation and chart

    How do you calculate GI sheet weight in kg?

    We take an example to understand how to calculate GI sheet weight in kg. We can use the formula mentioned above to understand the weight calculation. Here:

    Length = 5 m

    Width = 2 m

    Thickness = 0.5 mm

    Density = 7.85 or 7.87 (density of steel when galvanised with zinc)

    Weight = L x W x T x D

    Standard GI sheet weight in kg:

    = 5 x 2 x 0.5 x 7.85

    = 39.25 kg

    Weight of the GI sheet is 39.25 kg.

    GI sheet weight in kg (for galvanised):

    = 5 x 2 x 0.5 x 7.87

    = 39.35 kg

    Weight of the GI sheet is 39.35 kg.

    What is the density of GI sheet in kg m³?

    In general, the weight of galvanised steel is slightly heavier than regular steel because of the galvanising process. The density of GI sheets ranges between 7,850 to 8,050 kg/m³. For regular calculation of GI sheet weight, you may consider the Density of steel as 7850 kg/m³ or 7870 kg/m³.

    Also read: Steel bar weight chartLearn to calculate weight of steel

    GI sheet weight calculator

    What is the weight of 1 GI sheet?

    The weight of 1 GI sheet will vary based on the GI sheet size.

    To calculate weight of a single Galvanised Iron sheet, begin by measuring the GI sheet size and dimensions – thickness, length and width.

    Once you have the dimensions, put it in the formula for GI sheet weight calculator:

    Weight = Length x Width x Thickness X Density of Galvanised Steel

    Where,

    Density of galvanised steel = 7850 kg/m³ (kilograms per cubic meter) or 7.85 (factor)

    Length = 8 m

    Width = 4 m

    Thickness = 2 mm

    Weight = Length x Width x Thickness x Density

    = 8 x 4 x 2 x 7.85

    = 502. 4 kg

    Replacing Density with 7.87

    W = 8 x 4 x 2 x 7.87

    = 503.68 kg

    Thus, weight of 1 GI sheet of 8 meters length, 4 meters width and 2 milli-meters thickness is 502.4 kg to 503.68 kg.

    What is the weight of GI roof sheet per square meter?

    During the calculation of weight of galvanised iron sheets, it’s vital to get the measurement units right. In the previous section, we’ve understood how to calculate GI sheet weight in kgs. Here, we’ll take a look at how to calculate weight of GI roof sheet per square meter.

    Unlike standard flat GI sheets, roofing sheets have ridges or corrugations that makes its calculation slightly complex. Here’s how you can go ahead with calculation of weight of GI sheet per sq meter:

    • Measure the dimensions of the sheet before corrugation (corrugation will increase the area and impacts the weight per sq meter)
    • Take measurements of the length and width of the flat sheet in meters (m)
    • Calculate the weight using the standard formula: W = Area (m²) x Thickness (mm) x Density
    • Example:

    GI sheet flat section = 5 meters x 2 meters, Thickness = 1.5 mm

    Area = 5 x 2 = 10 m²

    Weight = 10 m² x 1.5 mm x 7.85 kg/m² x 10-³ (for conversion to same units)

    = 0.11775 kg

    • Actual weight with corrugation:

    Weight = 0.11775 kg x 7.85 kg/m²= 0.9243 = 0.92 kg/m²

    Also read: What are corrugated roof sheets?

    What is the weight of 120 GSM GI sheet?

    Before calculating the weight of 120 GSM GI sheets, let’s understand the meaning of GSM in this context.

    GSM stands forGrams per square meter.

    120 GSM GI sheets mean – 120 grams per square meter of zinc coating for the GI sheets (i.e., thickness)

    As such, a 120 GSM GI sheet is thicker and hence heavier than an 80 GSM GI sheet, and lighter than a 250 GSM GI sheet. Based on the GSM value, GI sheets can be used in different applications as per its strength, robustness and other properties.

    Weight of 120 GSM GI sheet:

    = Length x Width x Thickness x Density
    = 6 m x 3 m x 0.5 mm x 7.87
    = 70.83 kg

    GI sheet sizes

    What are the standard sizes of GI sheet?

    GI sheet sizes vary based on the brand/manufacturer and its application. Many manufacturers offer custom sizes to suit specific business needs.

    GI sheet standard sizes

    Length Width Thickness Zinc coating
    6 ft to 12 ft

    Popular: 8 ft

    2 ft to 6 ft

    Popular: 3 ft and 4 ft

    0.45 mm to 3mm

    Popular: 0.5 mm, 0.6 mm, 0.8 mm, 1.2 mm, 1.6 mm, 2 mm

    80 GSM to 220 GSM

    Popular: 80 GSM and 120 GSM

    *This is for reference only. Please check with your steel manufacturer for actual size, dimensions, weight and more.

    GI Sheet weight chart in kg

    A GI sheet weight chart can be used for reference for all your projects. Key thing to keep in mind is that you ensure that the units are correct to ensure that their no challenges in weight accuracy when using the GI sheet weight calculator.

    • Ensure that measurements in feet is converted to meters and milli meters
    • Example: 8 ft x 4 ft sheet is 2.44 m x 1.22 m

    Listed below is a standard weight chart for GI sheets to help you understand:

    Density of GI sheet: 7.87 kg/m²

    Thickness of GI sheet: 1.5 mm

    GI sheet size (in feet) Length (in meters) Width (in meters) Weight (in kg)
    6 x 3 1.83 m 0.9 m 19.44 kg
    6 x 4 1.83 m 1.22 m 26.36 kg
    8 x 3 2.44 m 0.9 m 25.92 kg
    8 x 4 2.44 m 1.22 m 35.14 kg
    10 x 3 3 m 0.9 m 31.87 kg
    10 x 4 3 m 1.22 m 43.21 kg
    12 x 3 3.66 m 0.9 m 38.89 kg
    12 x 4 3.66 m 1.22 m 52.7 kg

    *This chart is only for information with room for +/- Please ensure you check with your steel supplier for actual weight chart before purchase.

    Also read: I-beam weight chart

    What is a GI plain sheet used for?

    GI plain sheets are versatile and widely used across various industries. Their robustness and resistance to corrosion makes them indispensable in several applications. Here are some common uses of GI plain sheets:

    • Automotive body parts: These sheets offer sturdiness and resistance against rust for automobile body part, extending their lifespan while adding to their strength
    • Roofing solutions: They are durable, resists corrosion and other extreme weather conditions, and preferred for roofing solutions, providing protection to buildings
    • Wall cladding: Plain GI sheets are also used in industrial settings for protective wall cladding, protecting the underlying structure from chemical and mechanical damages (Also read: Cladding sheets – Uses, types and more)
    • Agricultural implements: Suitable for making tools and machinery, especially in agricultural environments with high moisture levels
    • Home appliances: GI sheets are commonly used in fabricating AC ducts due to its thermal resistance and ductility, while saving energy and facilitating seamless air flow

    In brief, GI sheets can be used in numerous sectors that face severe environmental conditions. They are strong and robust, and reliable and efficient when used in diverse industries. Using a GI sheet weight calculator it is easy for project engineers to determine the right GI sheet size and thickness for specific project requirements, enabling better planning.

    Looking for quality steel for your projects? Contact us today at Tata nexarc to buy steel at the best prices. We have partnered with leading steel sellers and offer steel across multiple brands and types. Best prices, credit option, and door-step delivery. To know more, get in touch today.

    Disclaimer: This article is for information purpose only. It focuses on the method of GI sheet weight calculation to enable professionals prepare GI sheet weight charts for their reference. You are advised to check with your steel seller/manufacturer for accurate sizes, dimensions, weight and other details.

    Sohini Banerjee

    Sohini is a seasoned content writer with 12 years’ experience in developing marketing and business content across multiple formats. At Tata nexarc, she leverages her skills in crafting curated content on the Indian MSME sector, steel procurement, and logistics. In her personal time, she enjoys reading fiction and being up-to-date on trends in digital marketing and the Indian business ecosystem.