About

Kilometrics is a streamlined, free-access digital resource designed for the rapid calculation and referencing of material mass within the construction and engineering sectors. While our database is expanding, our core focus remains on providing precision data for structural steel sections.

Whether you are a Quantity Surveyor estimating a bill of quantities, an Engineer verifying structural loads, or a Student learning the ropes, Kilometrics simplifies your workflow by providing instant access to critical data.

Our Core Capabilities

  • Rapid Estimation: Calculate the weight of steel components using industry-standard profiles.
  • Comprehensive Schedules: Access detailed mass schedules and dimensional data for various steel forms.
  • Visual Navigation: Seamlessly browse material categories through an intuitive, card-based interface.
  • Precision Tools:Utilize our integrated calculators to compute mass based on custom dimensions and material densities.

Navigating the Site:

  • Explore Categories: Start on the Homepage to browse steel sections via our visual category cards.
  • Custom Calculations: Use the calculator for bespoke round, square, flat, or hollow sections by selecting your material and dimensions.
  • Full Reference: Visit the Index comprehensive directory of all covered materials and profiles.
  • Standardised Tables: View detailed technical tables for each steel type within its specific section.

Note from the authors

Kilometrics is an evolving project born from a passion for engineering and web development. We are constantly refining our algorithms and expanding our database. As this is a living resource, we appreciate your patience and support as we continue to build a more robust experience.

Technical Tip: For maximum accuracy, always verify dimensions and unit conversions against manufacturer-specific tolerances. Calculations on this site utilize typical density values (e.g. 7,850 kg/cubic meter for mild steel).

Contact & Collaboration

We are committed to maintaining a clean, accurate, and accessible tool. If you have suggestions for new features, data corrections, or general feedback, we would love to hear from you. Email:

Credits & Inspiration

  • Design
    The layout and interactive style of this site were inspired by color-selector.com by Eugenie Garcia. (Note: No official affiliation or endorsement is implied).

We hope Kilometrics becomes a valuable tool for your projects. Thank you for using our site!

I-Section Taper Flange

Traditional structural sections featuring angled inner flange faces. Primarily used for classic framing and lighter-duty structural applications.

Typical Mass per Metre

Designation Mass (kg/m)
127 x 76 x 13 13.4
152 x 89 x 17 17.1
178 x 102 x 22 21.5
203 x 102 x 25 25.3
203 x 152 x 52 52.1
254 x 152 x 59 59.5
305 x 152 x 66 65.5

Tip: To estimate mass, use: Mass = Length × Mass per Metre

H-section parallel flange

Engineered for high load-bearing capacity. These sections feature parallel flanges and wider profiles, offering superior stability for columns and primary beams.

Typical Mass per Metre

Designation Mass (kg/m)
152 x 152 x 23 23.4
152 x 152 x 30 29.8
152 x 152 x 37 37.2
203 x 203 x 46 46.2
203 x 203 x 52 52.1
203 x 203 x 60 59.6
203 x 203 x 71 71.5
203 x 203 x 86 86.4
254 x 254 x 73 72.9
254 x 254 x 89 89.2
254 x 254 x 107 107
254 x 254 x 132 132
254 x 254 x 167 167
305 x 305 x 97 96.8
305 x 305 x 118 118
305 x 305 x 137 137
305 x 305 x 158 158
305 x 305 x 198 198
305 x 305 x 240 240
305 x 305 x 283 283

Tip: To estimate mass, use: Mass = Length × Mass per Metre

H-Section Piles

H-piles are driven into the ground for deep foundations, providing strong vertical load-bearing and resistance to lateral forcesore

Typical Mass per Metre

Designation Mass (kg/m)
203 x 203 x 54 53.5
254 x 254 x 63 62.5
254 x 254 x 85 84.7
305 x 305 x 79 79.0
305 x 305 x 110 110

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Channel Sections

C-shaped sections designed for structural support and vehicle manufacturing. Available in both traditional tapered flanges and modern parallel flange (PFC) formats.

Typical Mass per Metre

Designation Mass (kg/m)
100 x 50 x 11 10.6
120 x 55 x 13 13.4
140 x 60 x 16 16.0
160 x 65 x 19 18.8
180 x 70 x 22 22.0
200 x 75 x 25 25.3
220 x 80 x 29 29.4
240 x 85 x 33 33.2
260 x 90 x 38 37.9
280 x 95 x 42 41.8
300 x 100 x 46 46.2
76 x 38 x 7 6.70
127 x 64 x 15 14.9
152 x 76 x 18 17.9
178 x 54 x 15 14.5
381 x 102 x 55 55.1

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Equal Angle Sections

Equal angles have identical leg lengths, ideal for bracing and framing where uniform strength is needed.

Typical Mass per Metre

Designation Mass (kg/m)
25×25×31.1
30×30×31.3
40×40×42.4
50×50×53.7
60×60×65.4
65×65×65.9
75×75×66.8
80×80×89.5
90×90×810.8
100×100×1015.0
120×120×1221.6
150×150×1227.2

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Unequal Angle Sections

L-shaped structural steel sections used for bracing, shelving, and framework. Tables include dimensions for both equal-sided and offset-flange profiles.

Typical Mass per Metre

Designation Mass (kg/m)
50×30×53.1
65×50×54.3
75×50×65.5
90×60×66.9
100×65×67.7
100×75×810.2
125×75×812.4
150×90×1017.3
150×100×1221.5
200×100×1225.6

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Flat Bar

Flat bars are versatile sections used in fabrication, bracing, base plates, and general structural support

Typical Mass per Metre

Width (mm) Thickness (mm) Mass (kg/m)
2050.8
2551.0
3061.4
4061.9
5062.4
5083.2
6584.2
75105.9
100107.9
1501214.1

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Flat products

Hot rolled steel sheets and plates are used in fabrication, structural bases, and welded sections, with uniform thickness and good workability

Typical Mass per Square Metre

Thickness (mm) Mass (kg/m²)
323.6
431.4
539.3
647.1
862.8
1078.5
1294.2
16125.6
20157.0
25196.2

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Steel Plates

High-quality hot-rolled flat products. We provide mass data for a full range of thicknesses, suitable for fabrication, structural base plates, and industrial welding.

Typical Mass per Square Metre

Thickness (mm) Mass (kg/m²)
1078.5
1294.2
16125.6
20157.0
25196.2
30235.5
40314.0
50392.5
60471.0
80628.0
100785.0

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Steel Slabs

For rolled/continuous-cast slabs, the weight is usually given per square metre based on thickness. Slabs are typically thicker than plates. These are common reference values for mills or bulk steel users.

Typical Mass per Square Metre

Thickness (mm) Mass (kg/m²)
1501177.5
1801413.0
2001570.0
2501962.5
3002355.0
3502747.5
4003140.0

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Square Bars

Solid square profiles providing high strength and symmetry. Ideal for general fabrication, ornamental ironwork, and industrial machinery components.

Typical Mass per Metre

Size (mm) Mass (kg/m)
100.62
120.90
161.60
202.50
253.90
305.60
4010.0
5015.6
6022.5
7535.2
10062.0

Tip: To estimate mass, use: Mass = Length × Mass per Metre

Round Bars

Solid circular sections used extensively in machining, fasteners, and reinforcement. Our tables cover standard diameters with calculated mass based on volume and density.

Typical Mass per Metre

Diameter (mm) Mass (kg/m)
100.62
120.89
161.58
202.47
253.85
305.55
409.86
5015.4
6022.2
7534.7
10061.6

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Lipped Channels (CFC)

Cold-formed channels with lipped edges for improved rigidity and connection strength in light gauge construction.

Typical Mass per Metre

Designation (Depth×Width×Lip×Thickness mm) Mass (kg/m)
75×35×15×1.62.1
100×50×15×1.62.9
125×50×20×1.63.6
150×50×20×1.64.2
150×64×20×2.05.6
200×75×20×2.58.9
200×75×20×3.010.6
250×75×20×2.510.5
250×75×20×3.012.6
300×100×25×3.016.5

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Lipped Zeds (Cold-Formed Sections)

Z-shaped cold-formed sections with lips for additional strength in roofing and cladding support systems.

Typical Mass per Metre

Designation (Depth×Width×Lip×Thickness mm) Mass (kg/m)
100×50×15×1.62.8
125×50×20×1.63.4
150×50×20×1.64.0
150×64×20×2.05.4
200×75×20×2.58.5
200×75×20×3.010.2
250×75×20×2.510.1
250×75×20×3.012.1
300×100×25×3.016.0

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Lipped Angles (Cold-Formed Sections)

Angles with lips on the flanges for extra stiffness, used in lightweight framing systems.

Typical Mass per Metre

Designation (Leg×Leg×Lip×Thickness mm) Mass (kg/m)
50×50×15×1.62.4
65×65×20×1.63.2
75×75×20×1.63.8
75×75×20×2.04.7
100×100×20×2.06.4
100×100×20×2.57.9
125×125×20×2.510.0
150×150×20×3.014.3

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Cold formed channels

Lightweight, precise channels formed at room temperature for wall framing and purlins.

Typical Mass per Metre

Designation (Depth×Width×Thickness mm) Mass (kg/m)
75×35×1.61.9
100×50×1.62.7
125×50×1.63.3
150×50×1.63.9
150×64×2.05.2
200×75×2.58.4
200×75×3.09.9
250×75×2.59.8
250×75×3.011.8
300×100×3.015.7

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Top Hats (Cold-Formed Sections)

Top hat sections provide rigid profiles for ceiling, wall systems, or light support frames.

Typical Mass per Metre

Designation (Depth×Width×Flange×Thickness mm) Mass (kg/m)
50×35×15×1.21.5
75×35×15×1.21.9
100×35×15×1.22.3
100×50×20×1.63.2
125×50×20×1.63.8
150×50×20×1.64.4
150×64×20×2.05.6
200×75×20×2.58.7

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Cold-Formed Angles (Equal Legs)

Equal-sided cold-formed angles used for bracing and lightweight frames.

Typical Mass per Metre

Designation (Leg×Leg×Thickness mm) Mass (kg/m)
30×30×1.61.3
40×40×1.61.8
50×50×1.62.3
50×50×2.02.8
65×65×2.03.7
75×75×2.55.2
100×100×2.57.0
100×100×3.08.3

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Cold-Formed Angles (Unequal Legs)

Angles with unequal legs for specialized bracing and construction detailing.

Typical Mass per Metre

Designation (Leg1×Leg2×Thickness mm) Mass (kg/m)
50×30×1.61.8
65×50×1.62.4
75×50×2.03.2
100×50×2.04.0
100×65×2.55.2
125×75×2.56.6
150×100×3.09.8

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Hollow Sections Square (SHS)

Versatile structural components offering high torsional rigidity. Ideal for modern architecture, mechanical frames, and precision engineering.

Typical Mass per Metre

Designation (Size×Thickness mm) Mass (kg/m)
25×25×2.02.0
40×40×2.53.8
50×50×2.54.8
65×65×3.07.1
75×75×3.08.3
100×100×4.013.2
125×125×4.016.8
150×150×5.024.5

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Hollow Section Round (CHS)

Versatile structural components offering high torsional rigidity. Ideal for modern architecture, mechanical frames, and precision engineering.

Typical Mass per Metre

Designation (Diameter×Thickness mm) Mass (kg/m)
25×2.01.5
32×2.02.0
40×2.53.0
50×2.53.8
65×3.05.9
80×3.07.3
100×4.011.2
125×4.014.1
150×5.021.5

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Hollow sections Rectangular (RHS)

Versatile structural components offering high torsional rigidity. Ideal for modern architecture, mechanical frames, and precision engineering.

Typical Mass per Metre

Designation (Height×Width×Thickness mm) Mass (kg/m)
50×25×2.02.5
75×50×2.03.8
100×50×2.55.8
125×75×3.09.2
150×100×3.011.5
200×100×4.017.3
250×150×5.027.1

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

Bolts (Hex Head)

Standardized fasteners used to join structural sections securely, ensuring safe connections in construction.

Typical Mass per 100 Pieces

Bolts (Hex Head)
Diameter Mass per 100 pcs (kg)
M62.4
M84.4
M107.5
M1210.9
M1619.8
M2031.2
M2445.0
Nuts (Hex Head)
Diameter Mass per 100 pcs (kg)
M60.5
M81.0
M101.5
M122.3
M164.3
M207.0
M2410.5

Tip: To estimate mass, use: Mass per metre ≈ π × (Diameter/2)² × Density (for mild steel ~7850 kg/m³).

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