Angle Weight & Cost Calculator

Calculate weight per piece and total weight for equal and unequal angles from dimensions, material density and quantity.

How is angle steel weight calculated? - Calculation Methodology

Our calculator uses precise mathematical formulas to calculate the weight of different types of angle steel. Depending on the selected angle type, appropriate formulas are used:

Equal Angles

The weight of an equal angle is calculated based on the formula:

Weight = (2 × a × t - t²) × L × ρ

where:

a - leg length of the angle [m]
t - thickness of the angle [m]
L - length of the angle [m]
ρ - material density [kg/m³]

Dimensions provided in millimeters are automatically converted to meters during calculations.

Unequal Angles

The weight of an unequal angle is calculated based on the formula:

Weight = (a × t + b × t - t²) × L × ρ

where:

a - length of the first leg [m]
b - length of the second leg [m]
t - thickness of the angle [m]
L - length of the angle [m]
ρ - material density [kg/m³]

Calculation Examples

Example 1: Equal Steel Angle

Data:

Leg length: 50 mm (0.05 m)
Thickness: 5 mm (0.005 m)
Angle length: 2000 mm (2 m)
Material: plain steel (7850 kg/m³)

Calculation:

Weight = (2 × 0.05 × 0.005 - 0.005²) × 2 × 7850

Weight = (0.0005 - 0.000025) × 2 × 7850

Weight = 0.000475 × 2 × 7850

Weight = 7.46 kg

Example 2: Unequal Aluminium Angle

Data:

First leg length: 60 mm (0.06 m)
Second leg length: 40 mm (0.04 m)
Thickness: 6 mm (0.006 m)
Angle length: 3000 mm (3 m)
Material: aluminium (2700 kg/m³)

Calculation:

Weight = (0.06 × 0.006 + 0.04 × 0.006 - 0.006²) × 3 × 2700

Weight = (0.00036 + 0.00024 - 0.000036) × 3 × 2700

Weight = 0.000564 × 3 × 2700

Weight = 4.57 kg

Material Density Table - Reference Data

The table below presents detailed density values for various materials used for manufacturing angle steel and utilized in our calculator. Precise density values are key to obtaining accurate angle steel weight calculation results:

Material	Density (kg/m³)	Characteristics
Plain Steel (carbon)	7850	Most popular construction material, high strength, good weldability
Stainless Steel	7930	Increased corrosion resistance, used in aggressive environments
Aluminium	2700	Lightweight metal, good corrosion resistance, high strength-to-weight ratio
Copper	8960	Excellent electrical and thermal conductivity, used in installations
Brass	8500	Copper and zinc alloy, good machinability, corrosion resistance
Cast Iron	7200	High abrasion resistance, good vibration damping, limited weldability
Titanium	4500	Lightweight, very strong, exceptional resistance to corrosion and high temperatures

The above density values are standard values for pure materials or typical alloys used in industry. In practice, depending on the exact alloy composition, heat treatment, or material quality, the density may vary slightly (usually by ±1-2%).

Material cost versus fabrication cost

Material cost is total order weight multiplied by your price per kg or per lb. Divide a price per metric tonne by 1000 before using the metric price field. A US short ton is 2000 lb, so check which ton your quotation uses. Divide a quoted sheet price by its weight to compare suppliers on the same basis. This tool does not fetch current steel prices or exchange rates. Cutting, bending, welding, finishing, delivery and tax are separate items. If you must buy whole stock lengths or sheets, include the unused material in the purchasing budget.

Equal and unequal angle weight per metre

For an ideal angle with legs a and b and thickness t, area is t × (a + b − t). Subtracting the overlapping square avoids counting the corner twice. A 50 × 50 × 5 mm angle has an area of 475 mm² and weighs approximately 3.729 kg/m, or 22.373 kg for 6 m.

Unequal angles use the same formula with different leg dimensions. Rolled angles include root and toe radii; bent angles also have a bend radius. Neither is fully represented by this sharp-corner model. Use the supplier’s published mass for catalogue purchasing and this calculation for a transparent geometric estimate.

Theoretical weight reference

Fixed examples for carbon steel at an assumed density of 7850 kg/m³, not every steel grade. The table does not change with the calculator’s material selection. For stainless steel or other metals, use the appropriate density in the calculator. Cross-section dimensions are in mm; coatings, corner radii and tolerances are excluded. These are geometric estimates, not manufacturer catalogue weights.

Carbon steel · ρ = 7850 kg/m³ · a = 50, b = 50, t = 5 mm
Length	Weight
1 m	3.729 kg
2 m	7.458 kg
3 m	11.186 kg
6 m	22.373 kg

Check this worked example

A = t × (a + b − t)

475 mm² × 0.00785 = 3.729 kg/m

Example Applications of Angle Steel - Practical Solutions

Below are specific examples of using angle steel in various projects, along with weight calculations and selection of appropriate profiles:

Example 1: Advertising Frame

Scenario: An advertising company needs to build a lightweight frame for a 3×2 m banner.

Required data:

Frame dimensions: 3000×2000 mm
Selected angles: aluminium equal angles 30×30×3 mm
Material: aluminium (2700 kg/m³)

Calculations:

Total angle length: 2 × 3 m + 2 × 2 m = 10 m
Cross-sectional area: (2 × 0.03 × 0.003 - 0.003²) = 0.000171 m²
Volume: 0.000171 m² × 10 m = 0.00171 m³
Weight: 0.00171 m³ × 2700 kg/m³ = 4.62 kg

Solution: Aluminium angles provide a lightweight structure (only 4.62 kg), easy to transport and assemble, with good resistance to weather conditions.

Example 2: Support Structure

Scenario: A production plant needs to make a support structure for heavy machinery.

Required data:

Structure dimensions: 4 posts 1.2 m high
Selected angles: steel equal angles 80×80×8 mm
Material: structural steel (7850 kg/m³)

Calculations:

Total angle length: 4 × 1.2 m = 4.8 m
Cross-sectional area: (2 × 0.08 × 0.008 - 0.008²) = 0.001216 m²
Volume: 0.001216 m² × 4.8 m = 0.005837 m³
Weight: 0.005837 m³ × 7850 kg/m³ = 45.82 kg

Solution: Large steel angles provide high load capacity for the structure, necessary to support heavy machinery. Despite the significant weight (45.82 kg), the structure is solid and durable.

Applications of Angle Steel - Industries and Use Cases

Angle steel profiles are extremely versatile structural components used in many fields of industry and construction. Below are the main industries and application examples for angle steel:

Construction

In construction, angle steel serves as a basic structural element used for:

Structural reinforcements - stiffening corners of frames and structures
Brackets - supporting structural elements, shelves, handrails
Facade substructures - mounting facade panels
Installation grids - suspending technical installations
Door and window frames - reinforcing openings

Metal Industry

In the metal industry, angle steel is used as:

Frame and rack elements - for machines, equipment, and shelves
Corner reinforcements - in metal structures, cabinets
Connecting profiles - joining elements at a 90-degree angle
Stiffeners - preventing structural deformation
Cable tray elements - in electrical installations

Architecture and Furnishings

In architecture and interior design, angle steel is used as:

Balustrade and railing elements - safety structures
Furniture profiles - frames, bases, table legs
Finishing strips - corner guards, skirting boards
Decorative elements - in modern industrial design
Shelf brackets - mounting elements on walls

Differences between Equal and Unequal Angles

Choosing the right type of angle steel depends on the specific application:

Equal Angles - have legs of the same length, ensuring symmetrical load transfer. They are most commonly used in standard steel structures where loads are distributed evenly.
Unequal Angles - have legs of different lengths, allowing for optimal use of space in areas with limited room. They are often used when one leg needs to be longer to provide a larger mounting surface.

Proper selection of the angle type is crucial for the safety and durability of the structure, so it is worth performing accurate calculations before starting the project.

Frequently Asked Questions (FAQ) - Comprehensive Information

We have gathered answers to the most frequently asked questions about angle steel and its weight calculations. If you don't find the answer to your question here, please contact us directly.

Standard dimensions of equal angles according to BS EN 10056-1 include:

20×20×3 mm - lightweight applications (furniture, small elements)
30×30×3 mm, 30×30×4 mm - medium applications
40×40×4 mm, 40×40×5 mm - standard structures
50×50×5 mm, 50×50×6 mm - industrial structures
60×60×6 mm, 60×60×8 mm - heavy structures
80×80×8 mm, 80×80×10 mm - highly loaded elements
100×100×10 mm, 100×100×12 mm - special structures

Dimensions are given in the order: leg width × leg width × thickness. Intermediate sizes and larger dimensions (e.g., 120×120×12 mm, 150×150×15 mm) are also available in many countries.

Popular dimensions of unequal angles according to BS EN 10056-1 include:

30×20×3 mm - lightweight applications
40×20×4 mm - small structural elements
45×30×4 mm - medium loads
60×40×5 mm - standard structural applications
65×50×6 mm - industrial structures
80×60×7 mm - highly loaded elements
100×65×8 mm - heavy structures
120×80×10 mm - special structures

Dimensions are given in the order: longer leg width × shorter leg width × thickness. Other dimension combinations are also available depending on the manufacturer and country.

Choosing the right angle steel depends on several key factors:

Expected load - higher loads require angles with larger dimensions and thickness
Type of application - determines whether an equal or unequal angle is needed
Environmental conditions - dictate the choice of material (plain steel, stainless steel, aluminium)
Connection method - welding requires consideration of material weldability
Available space - limits the maximum dimensions of the angle
Aesthetics - the appearance of the angle may be important in visible applications

For load-bearing structures, it is best to consult the choice with a structural engineer who will perform appropriate strength calculations and select the optimal profile.

For an angle with non-standard dimensions, you should:

Calculate the cross-sectional area of the angle using the formula:
- For an equal angle: A = (2 × a × t - t²)
- For an unequal angle: A = (a × t + b × t - t²)
where a, b are leg lengths, and t is the thickness (all in meters)
Multiply the cross-sectional area by the length of the angle to get the volume
Multiply the volume by the material density (kg/m³)

Our calculator automatically performs these calculations after entering the angle dimensions, material, and length.

Aluminium angles have several significant advantages compared to steel angles:

Lower weight - aluminium has a density of about 2700 kg/m³, which is about 35% of the density of steel (7850 kg/m³)
Better corrosion resistance - aluminium naturally forms an oxide layer that protects against corrosion
Easier processing - aluminium is softer, making cutting and drilling easier
Aesthetic appearance - natural silver color and possibility of anodizing
Non-sparking - useful in explosion-hazard zones

On the other hand, steel angles have higher strength, better weldability, and are usually cheaper. The choice between aluminium and steel should consider the specific requirements of the project.