How accurate are these calculations?

The calculations are based on peer-reviewed empirical equations and established engineering standards (ASME, EN, ISO, ASTM). Accuracy depends on: (1) accuracy of input data (steel composition from mill certificate, not nominal); (2) applicability of the equation to the specific alloy (most are calibrated for carbon and low-alloy steels); (3) whether equilibrium conditions apply. For design-critical applications, always verify against material certificates and applicable codes.

Are these calculators suitable for design use?

These calculators are suitable for preliminary design, engineering checks, and educational purposes. For final design and qualification of safety-critical pressure equipment, structural connections, or weld procedures, calculations must be performed by a qualified engineer using the exact applicable code (ASME VIII, EN 13480, AWS D1.1, etc.) and verified by approved calculation methods. The calculators do not replace code compliance.

What units does the calculator use?

All calculators use SI units (°C, MPa, mm, kJ/mm, g/cm³) as primary output, with imperial conversions (°F, ksi, inches, J/in) provided where common in industry practice (particularly for ASME and AWS codes used in North America). Input and output units are clearly labelled in each calculator field.

Metal Weight Calculator — Free Bar,

Calculate the weight of common metal shapes — round bar, flat plate/sheet, hollow pipe/tube, square bar, hexagonal bar, and structural angle — in any alloy. Select the shape, enter dimensions in millimetres, and choose the alloy to get weight in kilograms and pounds.

Figure: Schematic diagram for Metal Weight Calculator — Bar, Plate, Pipe, Hex, and An… — key process, structure, and property relationships. © metallurgyzone.com/

Metal Weight Calculator

Shape

Length (mm)

Width (mm)

Thickness (mm)

Quantity (pieces)

Material / Alloy

Volume per piece (cm³)—

Weight per piece (kg)—

Total weight — × quantity (kg)—

Total weight (lbs)—

Weight per metre (kg/m)—

Material Density Reference

Alloy Family	Density (g/cm³)	Typical Grades
Carbon and low-alloy steel	7.80–7.87	A36, S355, 4140, P91
Austenitic stainless steel	7.90–8.00	304L, 316L, 310S, 904L
Duplex stainless steel	7.78–7.82	2205, 2507, LDX 2101
Aluminium alloys (wrought)	2.60–2.85	6061, 6082, 7075, 2024
Titanium alloys	4.43–4.65	Gr.2, Ti-6Al-4V, Ti-3Al-2.5V
Nickel superalloys	8.19–9.0	Inconel 625, 718, Hastelloy C276
Copper and brass	8.40–8.94	C10100, CuZn30, CuNi10