Calculate Steel Weight for 30 Metals: Formula & Calculator

I. How to Calculate Steel & Metal Weight?

Density-Based Formula

The following weight calculation formula can be used to calculate the steel/metal weight:

Weight (kg) = Sectional Area (mm²) × Length (m) × Density (ρ, g/cm³)× 1/1000

Above is the formula to calculate the steel weight in kg.

Determination of Density

For the metal density, you can also refer to the following:

• Density Table of Metals (Iron, Steel, Brass, Aluminum) and Alloys
• Density Table for Commonly Used Sheet Metal Materials

Simple Steel Weight Formulas

Simply enter data indicated (Decimal Inches), move from left to right making computations by factors as shown.

• ROUND Diameter x Diameter x 2.6729 = Lbs. Per Foot 
• FLAT Thickness x Width x 3.4032 = Lbs. Per Foot 
• SQUARE Diameter x Diameter x 3.4032 = Lbs. Per Foot 
• HEXAGON *Diameter x Diameter x 2.9437 = Lbs. Per Foot 
• OCTAGON *Diameter x Diameter x 2.8193 = Lbs. Per Foot 
• PIPE Actual O.D. – Wall x Wall x 10.68 = Lbs. Per Foot
• TUBE O.D. – Wall  x Wall  x 10.68 = Lbs. Per Foot  
• SHEET Thickness  x Width  x  Length  x  .2904 = Lbs. Each
• COIL O.D. x O.D.  – I.D.  x I.D. x .2223 = Lbs. Per Inch of Width 
• SHEET CIRCLE Diameter x  Diameter x  Thickness x  .228 = Lbs. Each
• PLATE Thickness  x  Width  x  Length x  .2836 = Lbs. Each

PLATE SHAPES:

• CIRCLE Diameter x  Diameter x  Thickness  x  .2227 = Lbs. Each
• RING Diameter x Diameter – I.D. x I.D. x Thickness x .2227 = Lbs. Each
• CIRCLE SECTOR    Radius x Radius x Number of Degrees in Arc x Thickness  x  .0025 = Lbs. Each
• TRIANGLE (Right Angle) Base Length  x  Height  x Thickness  x  .1418 = Lbs. Each
• TRAPEZOIDS (2 Sides Parallel) Side “A”  + Side “B”  x Height x Thickness  x 14.18 = Lbs.Each
• HEXAGON (Equal Sides) Side Length  x  Side Length x  .7367 = Lbs. Each
• OCTAGON Side Length  x  Side Length  x  1.3692 = Lbs. Each

NOTE: Formulas Are Based on Nominal Weights at .2836 Lbs. Per Cubic Inch and Should Be Considered Approximations Only Rather Than Actual Scale Weight.

Weights of Various Metals in Pounds Per *Cubic Foot

II. Steel & Metal Weight Calculator

To assist you in calculating the weight of various metals and steels, including MS plate, GI sheet, structural steel, MS angle, mild steel, steel bar, square tube, angle, and aluminum, we have created a Steel Weight Calculator and Metal Weight Calculator to help you determine the weight of metals in different shapes.

III. Calculation of Theoretical Steel Weight

The unit of measurement for calculating the theoretical weight of steel is kilograms (kg). The basic formula is:

W (Weight, kg) = F (Cross-sectional Area, mm²) × L (Length, m) × ρ (Density, g/cm³) × 1/1000

The density of steel is: 7.85g/cm³

Steel Plate weight calculation formula

• Formula: length(m)×width(m)×thickness(mm)×7.85
• E.g: 6m (length)×1.51m(width)×9.75mm (thickness)
• Calculation: 6×1.51×9.75×7.85=693.43kg

Steel Pipe weight calculation formula

• Formula: (OD-wall thickness)×wall thickness(mm)×length(m)×0.02466
• E.g: 114mm(OD)×4mm(wall thickness)×6m(length)
• Calculation: (114-4)×4×6×0.02466=65.102kg

Steel Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00617
• E.g: Φ20mm (dia.)×6m(length)
• Calculation: 20×20×6×0.00617=14.808kg

Square Steel weight calculation formula

• Formula: side width(mm)×side width(mm)×length(m)×0.00785
• E.g: 50mm(side width)×6m(length)
• Calculation: 50×50×6×0.00785=117.75(kg)

Flat Steel weight calculation formula

• Formula: side width(mm)×thickness(mm)×length(m)×0.00785
• E.g: 50mm(side width)×5.0mm(thickness)×6m(length)
• Calculation: 50×5×6×0.00785=11.775(kg)

Hexagonal Steel weight calculation formula

• Formula: side-to-side dia.×side-to-side dia.× length(m)×0.0068
• E.g: 50mm(dia.)×6m (length)
• Calculation: 50×50×6×0.0068=102(kg)

Rebar weight calculation formula

• Formula: dia.mm×dia.mm×length(m)×0.00617
• E.g: Φ20mm(dia.)×12m(length)
• Calculation: 20×20×12×0.00617=29.616kg

Flat Steel Tube weight calculation formula

• Formula: (side length+side width)×2×thickness×length(m)×0.00785
• E.g: 100mm×50mm×5mm(thickness)×6m (length)
• Calculation: (100+50)×2×5×6×0.00785=70.65kg

Rectangular Steel Tube weight calculation formula

• Formula: side width(mm)×4×thickness×length(m)×0.00785
• E.g: 50mm×5mm (thickness)×6m(length)
• Calculation: 50×4×5×6×0.00785=47.1kg

Equal-leg Angle Steel weight calculation formula

• Formula: (side width×2-thickness)×thickness×length(m)×0.00785
• E.g: 50mm×50mm×5(thickness)×6m(length)
• Calculation: (50×2-5)×5×6×0.00785=22.37kg

Unequal-leg Angle Steel weight calculation formula

• Formula: (side width+side width-thickness)×thickness×length(m)×0.0076
• E.g: 100mm×80mm×8(thickness)×6m(length)
• Calculation: (100+80-8)×8×6×0.0076=62.746kg

Brass Pipe weight calculation formula

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.0267

Copper Pipe weight calculation formula

• Formula: (OD-wall thickness)×thickness(mm)×length(m)×0.02796

Aluminum Checkered Sheet weight calculation formula

• Formula: length(m)×width(mm)×thickness (mm)×0.00296

See also  High Strength Steel Bar: Production and Properties

Brass Pipe weight calculation formula

• Formula: thickness(mm)×(O.D-thickness)×length(m)×0.0267

Copper Sheet weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.0089

Zinc Plate weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.0072

Lead Sheet weight calculation formula

• Formula: length(m)×width(mm)×thickness(mm)×0.01137

Octagonal Steel weight calculation formula

• Formula: length(m)×across width(mm)×across width(mm)×0.0065

Copper Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00698

Brass Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.00668

Aluminum Rod weight calculation formula

• Formula: dia.(mm)×dia.(mm)×length(m)×0.0022

Square Copper Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0089

Square Brass Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0085

Square Aluminum Rod weight calculation formula

• Formula: width(mm)×width(mm)×length(m)×0.0028

Hexagonal Copper Rod weight calculation formula

• Formula: across width(mm)×across width(mm)×length(m)×0.0077

Hexagonal Brass Rod weight calculation formula

• Formula: width(mm)×across width(mm)×length(m)×0.00736

Hexagonal Aluminum Rod weight calculation formula

• Formula: across width(mm)×across width(mm)×length(m)×0.00242

Aluminum Plate weight calculation formula

• Formula: thickness(mm)×width(mm)×length(m)×0.00171

Aluminum Pipe weight calculation formula

• Formula: thickness(mm)×(O.D(mm)-thickness(mm))×length(m)×0.00879

Download PDF:

• Steel weight calculation formula PDF