Select product form and material
Choose round tube or sheet / plate, then select a listed grade. The nominal density remains editable when a project or material certificate uses a different value.
Engineering Tool · Theoretical Weight
Tube, Sheet & Plate Weight Calculator
Calculate the theoretical weight of round tubes, sheets and plates in titanium, stainless steel, nickel alloys, copper and aluminium. Use metric or imperial dimensions, compare weight per unit, and build a multi-size calculation list for purchasing or quotation review.
Metric & imperial
Grade-based density
Multi-size total
Copy & CSV export
Enter Product Details
Choose a product form, units and nominal dimensions.
Product form
Input units
g/cm³
Editable for project-specific values.
mm
Imperial OD also accepts fractions and decimals such as 3/8 or .5.
mm
m
Enter the combined required length, not the number of pieces.
mm
mm
mm
Calculation List
Combine multiple tube, sheet or plate sizes and calculate a theoretical total.
| # | Product | Material | Nominal size | Entered amount | Unit weight | Total kg | Total lb |
|---|
Line items
0
Combined theoretical weight
0 kg
Imperial equivalent
0 lb
How to Use the Metal Weight Calculator
Use nominal dimensions for initial purchasing, packing or freight estimates. Confirm final order weight against the applicable specification and actual production data.
Enter dimensions and required amount
For tube, enter OD, wall thickness and the combined total length in metres or feet. For sheet or plate, enter thickness, width, length and the number of sheets or plates.
Copy or build a size list
Copy one result, or add several sizes to the calculation list. The list can be copied into an RFQ or downloaded as a CSV file for Excel.
Calculation Method
The calculator converts all entries to millimetres and metres internally before applying the selected nominal density.
Round tube theoretical weight
kg/m = π × (OD − WT) × WT × density ÷ 1000
OD and wall thickness are in millimetres. Density is in g/cm³. Total weight equals kg/m multiplied by the entered total tube length. Inside diameter is calculated as OD − 2 × WT.
Sheet / plate theoretical weight
kg = thickness × width × length × density × 10⁻⁶
Thickness, width and length are in millimetres. Multiply the single-piece result by quantity for the total theoretical weight.
Nominal Material Densities Used
Values below are room-temperature nominal values for estimation. Composition, specification and producer data can create small differences, so the calculator allows manual adjustment.
| Material family | Grades included | Nominal density (g/cm³) |
|---|---|---|
| Titanium | Grade 1 / Grade 2 / Grade 7 | 4.51 |
| Titanium | Grade 12 | 4.50 |
| Stainless steel | 304 / 304L | 7.93 |
| Stainless steel | 316L | 7.98 |
| Stainless steel | 321 | 8.03 |
| Stainless steel | 309S | 7.89 |
| Stainless steel | 310S / 310S-Mo nominal | 7.98 |
| Nickel / high-alloy | Nickel 200 / 201 | 8.89 |
| Nickel / high-alloy | Alloy 800 / 800H / 800HT | 7.94 |
| Nickel / high-alloy | Alloy 840 / UNS S33400 nominal | 7.91 |
| Nickel / high-alloy | Alloy 825 | 8.14 |
| Nickel / high-alloy | Alloy 600 / 601 / 625 | 8.47 / 8.11 / 8.44 |
| Nickel / high-alloy | Hastelloy C-276 / C-4 | 8.89 / 8.64 |
| Copper | Copper, nominal | 8.96 |
| Aluminium | Aluminium, nominal | 2.70 |
Enhanced Tube Weight Requires Geometry Review
This calculator uses the smooth round-tube formula. For integral low fin tubes and inner grooved tubes, the finished OD and a nominal wall thickness do not fully describe the metal cross-section. Use the parent-tube dimensions only for an initial estimate, or provide the parent tube size, root diameter, fin or groove geometry, plain-end details and drawing for project-specific review.
Metal Tube and Plate Weight Calculator FAQ
Short answers to common purchasing and engineering questions about theoretical metal weight.
Is the calculated weight the same as the shipment weight?
No. The result is a theoretical value based on nominal dimensions and nominal density. Actual weight may vary because of OD, wall, width, length and thickness tolerances, alloy composition, surface condition, manufacturing route, cut losses and weighing method.
Can I calculate tube weight in inches and feet?
Yes. Select Imperial to enter tube OD and wall thickness in inches and length in feet. The calculator displays results in both kilograms and pounds, including kg/m and lb/ft for round tube.
Which dimensions are needed for round tube weight?
Enter outside diameter, wall thickness and the combined total tube length required. Use metres in Metric mode or feet in Imperial mode. The wall thickness must be less than half of the outside diameter.
Can this calculator estimate copper or aluminium replacement weight?
It can compare theoretical weight when the same nominal geometry is entered with different material densities. It does not confirm that stainless steel, titanium or a nickel alloy is a suitable replacement. Material and geometry selection must also consider working medium, corrosion, temperature, pressure, fabrication, heat transfer requirement and customer specification.
Can I use the smooth tube formula for low fin or inner grooved tube?
Not from finished OD and nominal wall thickness alone. Enhanced tube weight depends on the parent tube and the actual fin or groove geometry. Parent-tube dimensions may provide an initial reference, but final weight should be reviewed from the drawing and manufacturing data.
Why can the density value be edited?
The displayed values are nominal. Density can vary slightly with composition and source data, especially for custom or modified alloys. An editable field allows buyers to use an approved project value, producer datasheet or material certificate value.
Need a Tube, Sheet or Plate Quotation?
Send the material grade, product form, nominal dimensions, length, quantity, applicable standard and drawing if available. For material replacement projects, also provide the working medium and service conditions for review.
This calculator is provided for preliminary estimation only. It does not replace an approved drawing, material specification, engineering calculation, commercial packing list or certified scale weight.