Calculate weight per piece and total weight for round pipe, square tube and rectangular tube from dimensions, material and quantity.
How is pipe and profile weight calculated? - Calculation Methodology
Our calculator uses precise mathematical formulas to calculate the weight of
different types of pipes and profiles. Depending on the selected type,
appropriate formulas are used:
Round Pipes
The weight of a round pipe is calculated based on the formula:
Weight = π × (D² - d²) / 4 × L × ρ
where:
π (pi) - mathematical constant approx. 3.14159
D - outer diameter of the pipe [m]
d - inner diameter of the pipe [m] (d = D - 2t, where
t is wall thickness)
L - length of the pipe [m]
ρ - material density [kg/m³]
Square Profiles
The weight of a square profile is calculated based on the formula:
Weight = (a² - (a - 2t)²) × L × ρ
where:
a - outer side dimension of the square profile [m]
t - wall thickness of the profile [m]
L - length of the profile [m]
ρ - material density [kg/m³]
Rectangular Profiles
The weight of a rectangular profile is calculated based on the formula:
Weight = (a × b - (a - 2t) × (b - 2t)) × L × ρ
where:
a - outer width of the rectangular profile [m]
b - outer height of the rectangular profile [m]
t - wall thickness of the profile [m]
L - length of the profile [m]
ρ - material density [kg/m³]
Calculation Examples
Example 1: Steel Pipe
Data:
Outer diameter: 60.3 mm (0.0603 m)
Wall thickness: 3.6 mm (0.0036 m)
Length: 6000 mm (6 m)
Material: plain steel (7850 kg/m³)
Calculation:
Inner diameter: d = D - 2t = 0.0603 - 2 × 0.0036 = 0.0531 m
The table below presents detailed density values for various materials used
for manufacturing pipes and profiles and utilized in our calculator.
Precise density values are key to obtaining accurate 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
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.
Pipe and tube weight per metre: use outside diameter
Enter outside diameter D and wall thickness t for round pipe. The inside diameter is D − 2t, and the metal area is the outside circle minus the inside circle. A 60 × 3 mm tube weighs approximately 4.217 kg/m; a 6 m length weighs 25.303 kg. Enter 6000 mm for that metric length.
For square or rectangular hollow sections, the model subtracts the inner rectangle from the outer one. Real corner radii change the area, so compare the result with the supplier’s kg/m figure. Nominal pipe size, DN and schedule are not direct outside-diameter and wall-thickness measurements. Look up those dimensions before calculating.
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 · D = 60, t = 3 mm
Length
Weight
1 m
4.217 kg
2 m
8.434 kg
3 m
12.651 kg
6 m
25.303 kg
Check this worked example
A = π/4 × (D² − (D − 2t)²)
537.212 mm² × 0.00785 = 4.217 kg/m
Practical Application Examples - Weight Calculations for Real Projects
Below are specific examples of using pipes and profiles in various projects,
along with weight calculations and selection of appropriate elements:
Example 1: Water Supply Installation
Scenario: Internal water supply installation in a
single-family house.
Required data:
Galvanized welded pipes: 33.7×3.2 mm (1")
Total installation length: 48 m
Material: galvanized steel (7850 kg/m³)
Calculations:
Outer diameter: 33.7 mm (0.0337 m)
Wall thickness: 3.2 mm (0.0032 m)
Inner diameter: 33.7 - 2×3.2 = 27.3 mm (0.0273 m)
Cross-sectional area: π×(0.0337² - 0.0273²)/4 = 0.000304 m²
Material volume: 0.000304×48 = 0.014592 m³
Weight: 0.014592×7850 = 114.55 kg
Application: Accurate weight calculation allows for
planning material transport to the installation site and estimating the
material costs of the installation.
Example 2: Railing Frame
Scenario: Making a railing frame for a terrace 8 m
long.
Required data:
Square profiles: 40×40×2 mm
Total profile length: 8 m (top rail) + 8 m (bottom rail) + 9×1 m
(vertical posts) = 25 m
Weight: 0.0076×7850 = 59.66 kg (Using corrected area from (0.04^2 -
(0.04-0.004)^2) * 25 * 7850)
Application: Knowing the weight of the structure allows
for selecting appropriate mounting elements and determining if the
structure requires additional reinforcements.
Applications of Pipes and Profiles - Industries and Use Cases
Pipes and profiles find wide application in many industrial and construction
sectors. Below are the main areas of use for each type:
Round Pipes
Round pipes are the most commonly used type of profile and are used in:
Water and sanitary installations - transport of
drinking water, sewage
Gas installations - transport of natural gas,
propane, butane
Heating installations - central heating systems, heat
exchangers
Chemical industry - transport of chemical substances,
reactors
Machinery and equipment, technological lines, support structures,
pressure vessels
Installations
Water supply, sewage, heating, air conditioning, gas networks, fire
protection systems
Frequently Asked Questions (FAQ) - Comprehensive Information
We have gathered answers to the most frequently asked questions about pipes,
profiles, and their weight calculations. If you don't find the answer to
your question here, please contact us directly.
The main differences between welded and seamless pipes are:
Production method: Welded pipes are made by
rolling steel strip and joining it longitudinally by welding,
while seamless pipes are made by extruding or drawing solid-state.
Strength: Seamless pipes generally have higher
strength, especially under bending and pressure loads, as they do
not have a weld that could be a potential point of weakness.
Applications: Seamless pipes are preferred in
applications requiring high strength and safety, such as
transporting gases and liquids under high pressure, while welded
pipes are commonly used in less demanding structural applications.
Cost: Seamless pipes are usually more expensive
than welded pipes due to the more complex manufacturing process.
Both versions have similar weight for the same dimensions, so our
calculator can be used to calculate the weight of both types of
pipes.
The most common standard lengths of pipes and profiles available
commercially are:
3000 mm (3 meters) - popular length for
structural profiles
6000 mm (6 meters) - most common length, standard
in most applications
12000 mm (12 meters) - length for special
applications, less commonly available
Some manufacturers also offer other lengths, usually ranging from 4
to 8 meters, depending on the profile type and material. Many
warehouses also offer a cutting service, allowing the purchase of
elements of the exact required length, which minimizes waste.
When planning a project, it is worth considering standard lengths to
minimize costs and waste. Our calculator allows calculating the
weight of pipes and profiles of any length, which facilitates
planning purchases and transport.
Choosing the correct wall thickness for a pipe or profile depends on
many factors:
Loads - the greater the planned loads, the
thicker the wall should be.
Type of application:
For domestic water installations, wall thicknesses of 1.5-2.0
mm are usually sufficient
For load-bearing structures, a minimum of 2.0-3.0 mm is
recommended
For industrial and pressure installations, wall thicknesses of
3.0-5.0 mm are often needed
Span between supports - larger spans require
thicker walls to avoid deflection.
Environmental conditions - in corrosive
environments, it is worth using thicker walls to account for
gradual thinning over time.
Regulations and standards - many applications,
especially in gas and pressure installations, have minimum
requirements specified by standards.
For structural and installation applications critical to safety, it
is always advisable to consult a structural engineer or installer
who can help determine the correct wall thickness based on strength
calculations.
The weight of pipes and profiles provided by manufacturers:
Is usually the theoretical weight, calculated based on nominal
dimensions.
Dimensional tolerances can cause differences between theoretical
and actual weight, usually within ±5%.
The largest impact on deviations comes from wall thickness
tolerance, which can be up to ±10% for some types of pipes.
Technical standards, such as BS EN 10219 (for cold-formed
profiles) or BS EN 10210 (for hot-formed profiles), specify
permissible dimensional deviations.
When ordering larger quantities of material, it is worth considering
these tolerances, especially if the material is billed by weight.
Our calculator calculates the theoretical weight based on the
provided nominal dimensions. For greater accuracy, especially for
precise quotations, we recommend adding a margin of 2-5% to the
calculated weight.
Pipes and profiles are available with various surface finishes,
which affect their corrosion resistance, appearance, and properties:
Raw (black) - standard finish without protective
coatings, requires anti-corrosion protection
Hot-dip galvanized - with a thick zinc layer
applied by immersion in a bath, provides high corrosion resistance
Electro-galvanized - with a thinner zinc layer
applied electrically, medium corrosion resistance
Powder-coated - covered with a layer of powder
paint, available in various colors, improves corrosion resistance
and aesthetics
Brushed - with a matte, brushed surface, popular
for stainless steel in decorative applications
Polished - with a glossy surface, mainly for
stainless steel in decorative applications
Anodized - for aluminium profiles, increases
corrosion resistance and allows coloring
The surface finish may slightly increase the weight of the element
(especially for hot-dip galvanizing), but the difference is usually
small enough not to require consideration in weight calculations for
most practical applications.
