Sheet Metal Weight Chart

Sheet Metal Weight Chart by Thickness

The chart uses these calculation bases:

Material shown in chart	Density used	Scope
Carbon/structural steel	7,850 kg/m³	Common estimating value for structural steel; confirm the ordered grade when mass is critical
304 stainless steel	7,900 kg/m³	Outokumpu Core 304/4301 published density of 7.9 kg/dm³
Aluminum alloy	2,700 kg/m³	Representative value from Aalco's 6082-T6/T651 sheet data; other alloys can differ

Nominal thickness (mm)	Steel (kg/m²)	Steel (lb/ft²)	304 stainless (kg/m²)	304 stainless (lb/ft²)	Aluminum (kg/m²)	Aluminum (lb/ft²)
0.5	3.93	0.80	3.95	0.81	1.35	0.28
0.8	6.28	1.29	6.32	1.29	2.16	0.44
1.0	7.85	1.61	7.90	1.62	2.70	0.55
1.2	9.42	1.93	9.48	1.94	3.24	0.66
1.5	11.78	2.41	11.85	2.43	4.05	0.83
2.0	15.70	3.22	15.80	3.24	5.40	1.11
2.5	19.63	4.02	19.75	4.05	6.75	1.38
3.0	23.55	4.82	23.70	4.85	8.10	1.66
4.0	31.40	6.43	31.60	6.47	10.80	2.21
5.0	39.25	8.04	39.50	8.09	13.50	2.77
6.0	47.10	9.65	47.40	9.71	16.20	3.32
8.0	62.80	12.86	63.20	12.94	21.60	4.42
10.0	78.50	16.08	79.00	16.18	27.00	5.53

Metric values are controlling. Values are calculated from the stated density and rounded to the nearest 0.01 kg/m². Imperial values are converted from the unrounded metric result using 1 kg/m² = 0.204816 lb/ft², then rounded to the nearest 0.01 lb/ft². Use more precision in the calculation when a rounding difference could affect freight, handling, or a design limit.

How to Calculate Sheet Metal Weight

For a rectangular sheet using metric dimensions:

Mass (kg) = length (m) × width (m) × thickness (mm) × density (kg/m³) ÷ 1,000

Where:

Length is the sheet or developed flat-pattern length in meters.
Width is the sheet or developed flat-pattern width in meters.
Thickness is the nominal or measured material thickness in millimeters.
Density is the value for the specified material grade or alloy in kilograms per cubic meter.

For weight per unit area:

Mass per area (kg/m²) = thickness (mm) × density (kg/m³) ÷ 1,000

Worked example: 1.5 mm steel sheet

A 1,000 × 2,000 × 1.5 mm steel sheet, using 7,850 kg/m³, has an estimated mass of:

1.000 m × 2.000 m × 1.5 mm × 7,850 kg/m³ ÷ 1,000 = 23.55 kg

This result describes the plain sheet before protective film, coating, packaging, or attached components are added.

How to Use the Chart for Common Sheet Sizes

Find the material and thickness in the main chart, then multiply its kg/m² value by the sheet area below. For the most accurate result, calculate with the unrounded density formula rather than multiplying a displayed two-decimal chart value.

Nominal sheet size	Area multiplier	Calculation
1,000 × 2,000 mm	2.0000 m²	kg/m² × 2.0000
1,219.2 × 2,438.4 mm (4 × 8 ft)	2.9729 m²	kg/m² × 2.9729
1,250 × 2,500 mm	3.1250 m²	kg/m² × 3.1250
1,500 × 3,000 mm	4.5000 m²	kg/m² × 4.5000

For example, an exact 4 × 8 ft sheet at 1.0 mm nominal thickness weighs approximately 23.34 kg (51.45 lb) in steel, 23.49 kg (51.78 lb) in 304 stainless steel, or 8.03 kg (17.70 lb) using the aluminum basis in this chart. Full-sheet pound values are converted from the unrounded kilogram results and rounded to the nearest 0.01 lb.

Gauge to Sheet Weight: Convert the Material First

Gauge is not a universal thickness unit. The same gauge number can represent different thicknesses in steel, stainless steel, aluminum, or galvanized sheet. First use a material-specific sheet metal gauge thickness chart or the supplier’s order documentation to obtain the nominal decimal thickness. Then calculate mass using that thickness and the density of the specified grade.

For drawings and purchase orders, state the material specification and thickness in millimeters or decimal inches instead of relying on gauge alone. Also identify whether a coated product is ordered by base-metal thickness, total coated thickness, or a product-standard designation.

Why Actual Sheet Metal Weight Can Differ

The density formula is exact for the inputs supplied, but the inputs are not always exact. Review these conditions before treating a chart result as final:

Condition	Effect on the estimate	Better approach
Thickness tolerance	Actual sheet may be above or below nominal thickness	Use measured thickness or the ordered product's permitted thickness range for upper- and lower-bound estimates
Alloy or grade	Stainless, aluminum, copper, and other alloy families do not share one density	Use the density published for the exact material designation
Metallic or organic coating	Coating adds mass that a base-metal-only calculation omits	Add the specified coating mass per area or obtain the coated-sheet mass from the supplier
Holes, slots, and large cutouts	Net part mass is lower than the rectangular blank	Use developed CAD area after subtracting removed geometry
Formed geometry	Bending does not create material, but the developed flat length includes bend allowance	Calculate from the released flat pattern, not only the finished part's bounding dimensions
Inserts, fasteners, welds, and sealants	Assembly mass is higher than bare-sheet mass	Add the verified mass of every installed component and joining material
Protective film and packaging	Shipping mass is higher than net metal mass	Use the supplier's packed weight for freight and lifting plans

For laser-cut parts, calculate both net part mass and gross stock consumption. Material nesting, web spacing, edge trim, and remnants affect purchased weight and cost even when they do not remain in the finished part. ShincoFab’s laser cutting service can review CAD geometry and stock utilization for a part-specific quotation.

Material-Specific Weight Guidance

Carbon and structural steel

This chart uses 7,850 kg/m³, a common structural-steel design value. It is suitable for early quoting and layout estimates, but it does not replace the purchased grade, dimensional tolerance, or supplier-reported bundle weight. For galvanized sheet, calculate the steel substrate and specified coating mass separately when the distinction matters.

304 stainless steel

The stainless column is specific to Outokumpu Core 304/4301 at 7,900 kg/m³. Do not automatically apply it to every stainless grade: alloy composition changes density. If corrosion resistance, finish, weld condition, or material traceability is important, review the exact grade with a stainless steel sheet metal fabrication supplier before release.

Aluminum sheet

The aluminum column uses 2,700 kg/m³, matching Aalco’s published value for 6082-T6/T651 sheet. It is a practical estimating basis for many aluminum-sheet comparisons, not a universal density for every alloy. Confirm the selected alloy and temper because strength, formability, corrosion behavior, and weight may all affect the design. See ShincoFab’s aluminum fabrication services for material and process context.

Design Checks Before Releasing a Drawing

State the complete material grade, alloy, and temper where applicable.
Dimension thickness directly in millimeters or decimal inches; do not leave gauge interpretation to the fabricator.
Define whether thickness and inspection apply before or after coating.
Separate gross purchased-sheet weight, rectangular blank weight, net flat-pattern weight, and finished assembly weight.
Use the developed flat pattern for formed parts and confirm that the bend allowance model matches the intended material and tooling.
Subtract holes and cutouts when net part mass matters.
Add hardware, weld metal, adhesives, gaskets, film, and other non-sheet items to the assembly mass.
Identify any maximum part, assembly, shipping, ergonomic-handling, or center-of-gravity requirement on the drawing or project specification.
Verify the finished mass on a scale when it controls lifting, transport classification, structural loading, or regulatory compliance.

Common Weight-Estimate Problems and Corrective Options

Problem	Corrective option	Trade-off
Only a gauge number is available	Convert it using the correct material-specific gauge table, then confirm the ordered decimal thickness	Nominal gauge conversion still does not capture supplier tolerance
The alloy is unknown	Use a clearly labeled preliminary density and request the exact material specification	The estimate remains unsuitable for a final mass limit
The part contains many cutouts	Export developed flat area or CAD mass properties from the released model	CAD results are only as accurate as the assigned material, thickness, and geometry
The sheet is coated	Add specified coating mass per area or use supplier data for the finished product	Coating systems and measurement conventions vary
Freight is being quoted	Calculate gross sheets, remnants or skeletons if shipped, pallets, wrapping, and accessories	Packed mass is higher than net product mass
Weight is close to a handling limit	Use maximum permitted thickness and the relevant density to estimate an upper bound for the bare sheet, then weigh the finished item	An upper-bound estimate may overstate normal production mass and still excludes added components unless they are calculated separately

Frequently Asked Questions

Find quick answers to the most common questions about sheet metal weight, including standard size calculations, material density comparisons, and how fabrication processes like bending and coating affect your final mass estimates.

How much does 1 mm sheet metal weigh per square meter?

Using this chart’s densities, 1.0 mm sheet weighs 7.85 kg/m² for carbon/structural steel, 7.90 kg/m² for 304 stainless steel, and 2.70 kg/m² for the representative aluminum basis. These are nominal calculated values before coatings or added components.

How much does a 4 × 8 ft sheet of metal weigh?

An exact 4 × 8 ft sheet has an area of 32 ft², or approximately 2.9729 m². Multiply that area by the chart value for the material and thickness. At 1.0 mm, the estimates are 23.34 kg for steel, 23.49 kg for 304 stainless, and 8.03 kg for the aluminum basis used here.

What is the formula for steel sheet weight?

In metric units, multiply length in meters by width in meters, thickness in millimeters, and density in kg/m³, then divide by 1,000. For the steel basis in this chart, use 7,850 kg/m³ unless the specified grade requires a different value.

Is stainless steel heavier than carbon steel?

It depends on the grades being compared. At equal area and thickness, the 304 stainless basis in this chart is about 0.64% heavier than the 7,850 kg/m³ structural-steel basis because its specified density is 7,900 kg/m³. Other stainless and carbon-steel grades may differ.

Is aluminum sheet one-third the weight of steel?

For equal area and thickness using this chart, aluminum at 2,700 kg/m³ is about 34% of the steel mass at 7,850 kg/m³. That comparison does not establish that an aluminum part can use the same thickness; stiffness, strength, joining, buckling, fatigue, and forming needs can change the design geometry.

Does bending change sheet metal weight?

Bending alone does not materially change the metal mass. However, a formed part’s flat pattern includes bend allowance, so estimating from only the finished outside length and width can be wrong. Use the developed flat geometry and then add or subtract any secondary materials or removed features.

Should coating be included in sheet metal weight?

Include coating when estimating finished-part, shipping, or verified assembly mass. Do not assume that the overall coated thickness multiplied by the base-metal density gives the correct answer. Use the coating specification’s mass per area or supplier data, especially for metallic coatings.

Can this sheet metal weight chart be used for lifting calculations?

No. Use it for preliminary estimating only. Lifting plans require verified actual mass, center of gravity, approved lifting points and equipment, and the applicable workplace or project safety requirements.

Need Help Estimating a Fabricated Part's Weight?

Send ShincoFab your drawing or CAD file, material grade or alloy, thickness, quantity, finish, critical tolerances, target part or assembly weight, and any freight or handling limit through the contact page for a part-specific DFM and quotation review.

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