About

Kilometrics is a free, easy-to-use online resource for calculating and referencing the mass of common construction and engineering materials — with a primary focus on steel sections.

Whether you're a quantity surveyor, engineer, architect, fabricator, or student, Kilometrics helps you:

  • Quickly estimate the weight of steel components using standard profiles
  • Access typical steel dimensions and mass schedules
  • Navigate through different steel forms with visual cards
  • Use the integrated calculator to compute estimated mass by size

How to use the site:

  • Start from the home page to explore the steel section categories via the colorful vertical cards
  • Use the calculator for round, square, flat, or hollow forms by selecting the material, shape, and dimensions
  • Switch to the Index for a full list of what's covered
  • View standard tables for each steel type under its corresponding section

Note from the authors

Kilometrics is a growing project built by individuals still learning and exploring web development and engineering tools. The site is not yet complete, and we are continually working to improve its content and features. We kindly ask for your patience and support as we build out the full experience.

Tip: When calculating the mass of a steel member, always double-check the dimensions and unit conversions. All densities are typical values — refer to manufacturer specifications for exact results.

Contact

We are committed to keeping Kilometrics accurate, clean, and accessible. If you have suggestions or corrections, we welcome your input. You may contac the team directly on info@kilometrics.net

Credits

  • Design
    Design of this website was inspired by the color-selector.com website, which was designed and curated by Eugenie Garcia

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

I-Section Taper Flange

Taper flange I-beams have angled inner flange faces for classic structural shapes, common in older or lighter duty frames.

Typical Mass per Metre

I-Section Taper Flange
Designation Mass (kg/m)
127×76×1313.0
152×89×1616.1
178×102×1919.0
203×102×2323.0
203×133×2525.1
254×102×2222.1
254×146×3131.4
305×102×2525.4
305×127×3737.0
305×165×4040.3
305×165×5454.0
305×152×6666.0

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

H-section parallel flange

H-sections with parallel flanges offer high load capacity for columns and beams. They have a wider flange than I-sections for improved stability.

Typical Mass per Metre

H-Section / UC Sections
Designation Mass (kg/m)
152×152×23 UC23.0
152×152×30 UC30.0
203×203×46 UC46.1
203×203×52 UC52.2
203×203×60 UC60.1
254×254×73 UC73.0
254×254×89 UC89.0
305×305×97 UC97.0
305×305×118 UC118.0
305×305×137 UC137.0
356×368×153 UC153.0
356×406×235 UC235.0
406×406×140 UC140.0
406×406×198 UC198.0
457×457×191 UC191.0
457×457×289 UC289.0

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

H-Section Piles
Designation Mass (kg/m)
203×203×5454.0
203×203×6060.1
254×254×7373.0
254×254×8989.0
305×305×9797.0
305×305×110110.0

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

Channel Sections

Channels are U-shaped sections used for frames, bracing, and lighter structural members.

Typical Mass per Metre

Channel Sections
Designation Mass (kg/m)
100×50×1111.0
125×65×1414.2
150×75×1717.1
180×75×2020.3
200×75×2322.9
230×75×2625.8
250×90×3030.0
300×90×3636.1
380×100×5050.0
381×102×5555.0

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

Equal Angle Sections
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

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

Typical Mass per Metre

Unequal Angle Sections
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

Flat Bar Sections
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

Hot Rolled Sheets / Plates
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

Plates are really just thicker hot-rolled sheets, typically used in fabrication, structural bases, and welded sections. They have a uniform thickness and good workability.

Typical Mass per Square Metre

Steel Plates
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

Steel Slabs
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 and round bars are basic forms used in machining, construction, and reinforcement.

Typical Mass per Metre

Square Bars
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 square and round bars are basic forms used in machining, construction, and reinforcement.

Typical Mass per Metre

Round Bars
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

Lipped Channels (CFC)
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

Lipped Zeds (Cold-Formed Sections)
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

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

Typical Mass per Metre

Lipped Angles (Cold-Formed Sections)
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

Cold-Formed Channels
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

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

Typical Mass per Metre

Top Hats (Cold-Formed Sections)
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

Cold-Formed Angles (Equal Legs)
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

Cold-Formed Angles (Unequal Legs)
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

Square hollow sections offer high torsional rigidity and clean lines for columns, frames, and modern architecture.

Typical Mass per Metre

Hollow Sections – Square (SHS)
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

Circular hollow sections provide uniform strength in all directions for poles, columns, and frames.

Typical Mass per Metre

Hollow Sections – Round (CHS)
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

Rectangular hollow sections combine strength with ease of connection for structural frames and supports.

Typical Mass per Metre

Hollow Sections – Rectangular (RHS)
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 and Rivets

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)
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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