Round Steel Weight Calculator User Guide
In mechanical manufacturing, equipment installation, metal processing, or material procurement, accurately calculating round steel theoretical weight is essential for cost control and material planning. Use our free online round steel weight calculator for instant results.
Supported Round Steel Types
- ✅ Material Options:
- Carbon Steel (density 7.85 g/cm³)
- Stainless Steel (304/316, density 7.93 g/cm³)
- Aluminum Round Bar (density 2.70 g/cm³)
- Copper Round Bar (density 8.90 g/cm³)
- ✅ Common Sizes: Φ6mm to Φ300mm
- ✅ Calculation Modes: Single bar weight / Total weight with quantity
Round Steel Weight Formula
Weight (kg) = Cross-sectional Area × Length × Density
Detailed formula:
kg = (π × D² ÷ 4) × L × ρ ÷ 1,000,000
Where:
- D: Diameter (mm)
- L: Length (m)
- ρ: Material density (g/cm³)
Simplified formula (Carbon Steel):
Weight per meter (kg/m) = 0.00617 × Diameter² (mm)
Common Round Steel Theoretical Weight Table (Carbon Steel)
| Diameter (mm) | Weight per Meter (kg/m) | 6m Bar Weight (kg) | 9m Bar Weight (kg) |
|---|---|---|---|
| Φ10 | 0.617 | 3.70 | 5.55 |
| Φ16 | 1.58 | 9.48 | 14.22 |
| Φ20 | 2.47 | 14.82 | 22.23 |
| Φ25 | 3.85 | 23.10 | 34.65 |
| Φ30 | 5.55 | 33.30 | 49.95 |
| Φ40 | 9.87 | 59.22 | 88.83 |
Use Cases
- Machining shops: Shaft parts material planning and procurement
- Construction sites: Embedded parts and support rod weight estimation
- Steel traders: Customer quotes and inventory management
- Project estimators: Material lists and cost accounting
Use our professional round steel weight calculator for accurate material planning and cost savings!
