Calcular Peso Barra Redonda
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Reviewed by Calculator Editorial Team
Calculating the weight of a round bar is essential for construction, engineering, and material handling. This guide explains how to determine the weight based on the bar's diameter, length, and material density.
How to Calculate the Weight of a Round Bar
The weight of a round bar can be calculated using the following steps:
- Measure the diameter of the bar in millimeters (mm).
- Determine the length of the bar in meters (m).
- Identify the material density in kilograms per cubic meter (kg/m³).
- Calculate the cross-sectional area of the bar.
- Multiply the cross-sectional area by the length and the material density to get the weight.
Use our calculator on the right to perform these calculations quickly and accurately.
Formula Used
The weight (W) of a round bar can be calculated using the formula:
This formula accounts for the circular cross-section of the bar and the material's density.
Worked Example
Let's calculate the weight of a 10mm diameter, 2m long steel bar with a density of 7850 kg/m³.
- Convert diameter to radius: 10mm ÷ 2 = 5mm = 0.005m
- Calculate cross-sectional area: π × (0.005)² = 0.00007854 m²
- Multiply by length: 0.00007854 × 2 = 0.00015708 m³
- Multiply by density: 0.00015708 × 7850 = 1.233 kg
The weight of the bar is approximately 1.233 kg.
Common Materials and Their Densities
Different materials have different densities, which affects the weight calculation. Here are some common materials and their typical densities:
| Material | Density (kg/m³) |
|---|---|
| Steel | 7850 |
| Aluminum | 2700 |
| Copper | 8960 |
| Brass | 8520 |
| Titanium | 4500 |
Always verify the exact density for your specific material and application.
Frequently Asked Questions
What units should I use for the diameter and length?
For the diameter, use millimeters (mm). For the length, use meters (m). These units are standard in construction and engineering calculations.
How accurate is this calculator?
The calculator provides precise results based on the formula and input values. For critical applications, verify with a professional engineer.
Can I use this for other shapes?
This calculator is specifically for round bars. For other shapes like squares or rectangles, use our dedicated calculators for those geometries.
What if my material isn't listed?
You can enter the density of your specific material in the calculator. Most standard materials' densities are readily available.