👤 By whycalculator Team 📅 Last Updated April 09, 2026
Steel Weight Calculator
Disclaimer: While we strive to ensure the accuracy of our calculator tools, we cannot be held responsible for any damages or financial losses resulting from their use.
This calculator makes it easy to estimate the weight of various steel shapes. Whether you’re working with round bars, square bars, pipes, rectangular bars, or hexagonal steel, this calculator simplifies the process.
Key Features:
- Multiple Shapes: Calculate weights for round, square, rectangular, and hexagonal bars, and pipes.
- Accurate Density Options: Select from different steel types like carbon steel, stainless steel, tool steel, and more.
- Instant Calculation: Get real-time weight estimates within seconds.
How to Calculate the Weight of Steel?
To find the weight of steel, first calculate the volume of the object. Then multiply that volume by the density of steel.
General Formula:
Weight (kg) = Volume (m^3) × Density (kg/m^3)
Formulas for Different Shapes:
Round Bar (Cylinder):
Weight = π × (D^2/4) × L × ρ
- D = Diameter (meters)
- L = Length (meters)
Example:
- Diameter = 10 cm = 0.1 m
- Length = 2 m
- Density = 7850 kg/m³
Weight = π × (D^2/4) × L × ρ
π × (0.124) × 2 × 7850 = 123.17 kg
Square Bar:
Weight = S^2 × L × ρ
S = Side Length (meters)
Example:
- Side = 5 cm = 0.05 m
- Length = 3 m
Weight = S^2 × L × ρ
= (0.052) × 3 × 7850 = 58.88 kg
Rectangular Bar:
Weight = W × H × L × ρ
- W = Width (meters)
- H = Height (meters)
Example:
- Width = 8 cm, Height = 4 cm, Length = 2 m
(0.08 × 0.04 × 2) × 7850 = 50.24 kg
Hexagonal Bar:
Weight = (3√3/4) × S^2 × L × ρ
S = Side Length (meters)
Pipe (Hollow Cylinder):
Weight = π × (Do^2−Di^2)/4 × L × ρ
- Do = Outer Diameter (meters)
- Di = Inner Diameter (meters)
| # | Shape | Dimension (cm) | Length (m) | Density (kg/m³) | Weight (kg) |
|---|---|---|---|---|---|
| 1 | Round Bar | 10 cm Diameter | 2 | 7850 | 123.17 |
| 2 | Square Bar | 5 cm Side | 3 | 7850 | 58.88 |
| 3 | Rectangular Bar | 8 cm × 4 cm | 2 | 7850 | 50.24 |
| 4 | Pipe (Hollow) | 10 cm OD, 8 cm ID | 2 | 7850 | 70.69 |
| 5 | Hexagonal Bar | 6 cm Side | 2 | 7850 | 98.77 |
| 6 | Round Bar | 8 cm Diameter | 3 | 7850 | 118.06 |
| 7 | Square Bar | 4 cm Side | 4 | 7850 | 50.24 |
| 8 | Rectangular Bar | 6 cm × 3 cm | 3 | 7850 | 42.39 |
| 9 | Pipe (Hollow) | 12 cm OD, 10 cm ID | 3 | 7850 | 94.24 |
| 10 | Hexagonal Bar | 5 cm Side | 4 | 7850 | 90.34 |
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FAQs:
Does the shape of steel affect its weight?
Yes, the shape affects how the volume is calculated. Different formulas apply for round bars, square bars, pipes, and hexagonal steel. The material’s density remains the same, but the shape impacts the overall volume and weight.
Why is it important to calculate steel weight accurately?
Accurate steel weight calculation is essential for cost estimation and transportation planning. It ensures the right amount of material is used, preventing waste or shortages.