Weight Calculator
Use this weight calculator to find the theoretical weight of pipes, plates, sheets, bars and rings in steel, stainless steel, nickel alloys, aluminium, titanium, copper and other metals. Choose the material and shape, enter the dimensions in millimetres, centimetres, metres, inches, feet or yards, and the calculator gives the weight in kilograms and pounds.
Material & Form
k = 1.000Dimensions
Cross-Section
RoundHow to use the weight calculator
- Select the material. Carbon and alloy steel are listed as Steel; austenitic stainless steels such as 304 and 316 are listed as Stainless 300 Series, and ferritic and martensitic grades as Stainless 400 Series. Nickel alloys are listed by alloy number – for example Nickel 400, 600, 625, 825 and C-276.
- Select the shape: round, square, rectangle, hexagonal, octagonal, sheet, plate, tubular / pipe or ring.
- Enter each dimension and choose its unit. Units can be mixed – for example, wall thickness in millimetres and length in metres.
- Enter the number of pieces, if required, to get the total weight.
How the weight is calculated
The calculator works out the volume of the shape from the dimensions and multiplies it by the density of the selected material. For a pipe, the volume is the cross-sectional area of the wall – based on the outside diameter and wall thickness – multiplied by the length. For a sheet or plate it is thickness × width × length, and for a ring it is the area between the outside and inside diameters multiplied by the thickness.
The result is a theoretical weight. Actual weight varies with the tolerances on diameter, thickness and length allowed by the product standard, and with small differences in density between grades of the same family. Commercial weights for invoicing are based on the weighed or calculated values agreed with the order.
For pipes to ASME B36.10M and B36.19M, the pipe schedule chart lists outside diameters, wall thicknesses and weights per metre for each schedule.
Products you can calculate
The calculator is useful for estimating freight, handling and fabrication weights of the products we supply, including stainless steel seamless pipes, stainless steel welded pipes, carbon steel seamless pipes such as ASTM A106 Grade B pipes, alloy steel pipes and tubes, plates including stainless steel plates, SS 316 sheets and plates, carbon steel plates and ASTM A516 Grade 70 plates, as well as round bars and rings. More charts and guides are on the technical resources page.
Frequently Asked Questions
Weight per metre in kg = (OD − WT) × WT × 0.02466, with the outside diameter (OD) and wall thickness (WT) in millimetres. This uses a density of 7.85 g/cm³ for carbon steel. Multiply by the length in metres for the pipe weight.
Austenitic stainless steels such as 304 and 316 have a density of about 7.9–8.0 g/cm³, slightly higher than carbon steel at about 7.85 g/cm³. Select Stainless 300 Series in the calculator for these grades.
Multiply thickness × width × length to get the volume, then multiply by the density. For carbon steel, a plate weighs about 7.85 kg per square metre for each millimetre of thickness.
Product standards allow tolerances on diameter, wall thickness, plate thickness and length, and densities vary slightly between grades. The calculator gives the theoretical weight for the nominal dimensions.