Mild steel
7.85 g/cm³ · 7,850 kg/m³
Free fabrication calculators
Metal fabrication calculators, made practical
Estimate material weight and cost, convert units, and plan common fabrication work with quick, easy-to-use tools.
Sheet and plate
Pipe and tube
Bars and sections
Unit converters
Sheet and plate weight
Estimate weight per sheet, batch weight, and optional material cost.
Approximate formula: length × width × thickness × density. Dimensions are in mm; density is in g/cm³.
Rectangular hollow section weight
Estimate RHS weight per metre and total weight.
Uses a square-corner hollow-section approximation. Rounded corners and manufacturing tolerances affect actual weight.
Round bar weight
Estimate weight per metre and total weight for solid round bar.
Pipe weight
Estimate pipe weight using outside diameter and wall thickness.
Flat bar weight
Estimate weight per metre and total weight for a solid rectangular bar.
Round tube weight
Estimate the weight of a hollow round tube.
Triangular plate weight
Estimate a right-triangle plate from its two perpendicular sides.
This calculator assumes a right triangle. It does not calculate arbitrary triangular shapes.
Sheet-metal bend allowance
Estimate bend allowance and outside setback for one bend.
Estimate only. The correct K-factor depends on material, tooling, and forming method.
Cut-list total
Add lengths of round or flat-bar pieces to estimate stock length and weight.
Round bar: Dimension 1 is diameter. Flat bar: Dimension 1 is width and Dimension 2 is thickness.
Material cost estimator
Estimate cost from known weight, price per kg, and optional waste.
Taxes, freight, cutting charges, and other fees are not included.
Length converter
Convert between common metric and imperial units.
Material density reference
Typical approximate densities used in the calculators.
Stainless steel 304
7.93 g/cm³ · 7,930 kg/m³
Stainless steel 316
7.98 g/cm³ · 7,980 kg/m³
Aluminium
2.70 g/cm³ · 2,700 kg/m³
Copper
8.96 g/cm³ · 8,960 kg/m³
Brass
About 8.50 g/cm³ · varies by alloy
These tools provide estimates, not certified weights. Confirm alloy grade, actual dimensions, and pricing with the supplier before purchasing or designing a load-bearing part.
About Siprodi
Useful tools for the metalworking bench
Siprodi brings common fabrication calculations together in one place. Use these tools for quick planning, material estimates, and everyday workshop checks.
Made for practical work
Estimate weights for sheet, plate, pipe, tube, and common bar profiles without working through each formula by hand.
Quick to use
Enter your dimensions, choose a material where available, and see your estimate alongside the calculator.
More than weight
Convert lengths, estimate material costs, total cut lists, and check a basic sheet-metal bend allowance.
Quick answers
Frequently asked questions
Helpful notes for using the calculators and understanding the results.
Are the results exact?
No. Results are estimates based on the dimensions and material density entered. Actual weights can vary with alloy, tolerances, corner radii, and manufacturing methods.
What units should I enter?
Follow the units shown beside each field. For example, sheet dimensions use millimetres, while many profile lengths use metres.
Does the cost estimate include fees?
The estimate uses the weight and price per kilogram you provide. Taxes, delivery, cutting, and other charges are not included.
Can I use these results for structural design?
Use the calculators for general estimating, not as a substitute for engineering calculations, certified data, or supplier specifications.
Why might my supplier’s weight differ?
Standard sizes, actual material grades, production tolerances, and profile geometry can all affect the final weight.
How do I start over?
Use the Reset button on a calculator to restore its default values and clear the displayed result.
Get in touch
Contact Siprodi
Have a question, spotted an issue, or have an idea for another fabrication calculator? Send us an email.
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