Metal Weight Calculator
Pick a material, a shape, and a length unit. Plate uses length, width, and thickness. Round bar uses length and diameter. Pipe uses length, outside diameter, and wall. Mass is volume times a typical density. Alloys differ. Not a mill cert.
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How to estimate metal mass
- Pick steel, aluminum, copper, brass, or stainless. Densities are typical published values, not a heat-specific mill cert.
- Pick plate, round, or pipe, then the unit for every size, default millimeters.
- Enter length plus the sizes for that shape. Pipe wall cannot fill the outside diameter.
- Read volume in m³, mass in kg, and pounds. Confirm alloy density. Estimate only.
Metal mass from volume × density
Plate, round, or hollow pipe with a static density table
| Steel | 7850 kg/m³ |
|---|---|
| Aluminum | 2700 kg/m³ |
| Copper | 8960 kg/m³ |
| Brass / stainless | 8500 / 8000 kg/m³ |
| Pipe volume | π (R² - r²) × length, wall cannot fill OD |
| Advice | Typical densities. Not a mill cert or structural design. |
What this metal weight page computes
Mass is volume in cubic meters times a table density. Plate is a box. Round is a cylinder. Pipe is a hollow cylinder from outside diameter and wall. A generic mass-over-volume identity without a metal table is the density calculator.
How volume and mass are computed
Every size converts to meters (mm × 0.001, cm × 0.01, in × 0.0254, ft × 0.3048). Plate m³ = L × W × T. Round m³ = π (d/2)² L. Pipe m³ = π ((OD/2)² - (ID/2)²) L with ID = OD - 2 × wall. kg = m³ × ρ. Pounds divide kg by 0.45359237. If 2 × wall ≥ OD the page rejects the pipe.
Alloys, coatings, and mill certs
Carbon steel near 7850 kg/m³ is a handbook typical, not A36 versus 4140. Aluminum 2700 is near 6061, not a lithium alloy. Copper 8960 is near pure copper, not a brass already listed at 8500. Galvanizing, paint, and hollow bar with a different ID need another model. Not a mill certificate and not structural design.
Use cases
A plate drop, a round-bar drop, or a pipe stick before you ask a vendor. Not a crane lift plan by itself.
Limits
Five densities. Three shapes. No I-beam table. Estimate only, not code approval. CZNull does not receive the sizes.