Calculadora de Peso de Tubo
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
kg/m = π·(OD²−ID²)/4 × ρ / 10⁶
About this calculator
This calculator determines the linear weight of metal tubes (steel, aluminum, copper, etc.) based on outer diameter (OD), inner diameter (ID), and material density. The calculation uses the formula kg/m = π·(OD²−ID²)/4 × ρ / 10⁶, where the cross-sectional area of the tube (annular ring) is multiplied by density, converting mm³ to m³. The result is the weight per meter, essential for structural design, logistics, and budgeting.
How to use: enter the outer diameter (mm), inner diameter (mm), and select the material (steel, aluminum, copper, cast iron, stainless steel, titanium) or input a custom density (kg/m³). The calculator displays weight per meter and optionally total weight for a given length. It is useful for engineers, designers, purchasers, and construction professionals needing to estimate loads, transport costs, or material quantities.
Common applications: calculating tube weight for metal structures, industrial piping, hydraulic systems, railings, handrails, and supports. Caution: ensure correct units (mm for diameters, kg/m³ for density). Typical densities: steel 7850 kg/m³, aluminum 2700 kg/m³, copper 8960 kg/m³. For coated tubes or thickness variations, actual weight may differ. The calculator assumes perfect circular cross-section and homogeneous material.
Frequently asked questions
What is the difference between linear weight and total weight?
Linear weight is the weight per meter of tube (kg/m). Total weight is linear weight multiplied by the total length of the tube (in meters).
Can I use this calculator for plastic tubes?
Yes, as long as you enter the correct density of the plastic (e.g., PVC ~1400 kg/m³, polyethylene ~950 kg/m³) in the custom density field.
What if my tube has variable wall thickness?
The calculator assumes constant thickness. For variable thickness, use the average inner diameter or consult the manufacturer for accurate data.
How do I convert the result to pounds per foot?
Multiply the result in kg/m by 0.671968975 to get lb/ft. Example: 10 kg/m × 0.67197 = 6.72 lb/ft.
Does the calculator account for coatings like galvanization?
No. Coatings add extra weight. For galvanized tubes, add approximately 5-10% to the calculated weight, depending on coating thickness.