Practical formulas for material planning.

Quick-reference weight calculations from the KSP product catalogue for preliminary estimation.

Formula Reference

Calculate approximate material weight.

These formulas are intended for preliminary reference. Actual weights can vary by manufacturing tolerance, standard, finish and material density. Confirm final values against the applicable product standard and supplier documentation.

Stainless Steel Pipe

Per metre: (OD - Wall Thickness) × Wall Thickness × 0.0248

Per foot: (OD - Wall Thickness) × Wall Thickness × 0.00756

OD and wall thickness in millimetres.

Stainless Steel Round Bar

Per metre: Diameter × Diameter × 0.00623

Per foot: Diameter × Diameter × 0.0019

Diameter in millimetres.

Stainless Steel Square Bar

Per metre: Side × Side × 0.00788

Per foot: Side × Side × 0.0024

Side dimension in millimetres.

Stainless Steel Hex Bar

Per metre: A/F × A/F × 0.00680

Per foot: A/F × A/F × 0.002072

A/F is across-flats dimension in millimetres.

Stainless Steel Flat Bar

Per metre: Width × Thickness × 0.00798

Per foot: Width × Thickness × 0.00243

Width and thickness in millimetres.

Stainless Steel Circle

Grams per piece: Diameter × Diameter × Thickness ÷ 160

Kg per piece: Diameter × Diameter × Thickness × 0.0000063

Dimensions in millimetres.

Brass / Copper Pipe

Per metre: (OD - Wall Thickness) × Wall Thickness × 0.0260

OD and wall thickness in millimetres.

Lead Pipe

Per metre: (OD - Wall Thickness) × Wall Thickness × 0.0345

OD and wall thickness in millimetres.

Aluminium Pipe

Per metre: (OD - Wall Thickness) × Wall Thickness × 0.0083

OD and wall thickness in millimetres.

Aluminium Sheet

Kg per piece: Length (m) × Width (m) × Thickness (mm) × 2.69

Use metres for length and width.

Stainless Steel Sheet & Plate

Kg per piece: Length (m) × Width (m) × Thickness (mm) × 8

Conversion: 1 metre = 3.2808 feet

For a more exact result, use the density specified for the actual alloy grade.

Sheet Width for Making Pipe

Approximate width: (Outer Diameter - Wall Thickness) × 22 ÷ 7

Use consistent units for outer diameter, wall thickness and calculated width.

Specification Support

More than a calculation: confirm the complete standard.

Product weight is only one part of correct material selection. Each enquiry should clearly state the product standard, material grade, dimensions, schedule or class, quantity, finish, testing and documentation requirements.

Send Your Specification

Product standard Material grade Size and thickness Schedule or pressure class Quantity and unit Testing and certification Surface finish Packing and delivery