Steel Bar Weight Calculator
Steel Bar Weight Calculator
Calculate the weight of steel bars and rebar for construction projects. Quickly determine weights for round, square, flat, and deformed reinforcement bars.
Dimensions
Length & Quantity
Material Properties
Weight Calculation Results
Weight per Bar:
0 kg
Total Weight:
0 kg
Cross-sectional Area:
0 mm²
Volume:
0 cm³
Weight per Unit Length:
0 kg/m
Total Length:
0 m
How to Use This Steel Bar Weight Calculator
Understanding Steel Bar Weight Calculation
Accurate weight calculation of steel bars is essential for construction projects, fabrication, and material estimation. The weight of steel bars depends on:
- Dimensions: The cross-sectional shape and dimensions of the bar
- Length: The linear measurement of each bar
- Material Density: The specific weight of the steel alloy used
- Quantity: The number of identical bars needed
This calculator helps you determine both individual bar weights and total weight for your required quantity, making material ordering and cost estimation more accurate.
Step-by-Step Instructions
- Select Bar Type: Choose the cross-sectional shape (round, square, flat, or rebar).
- Enter Dimensions: Provide the bar's dimensions based on the selected type.
- Specify Length: Enter the length of each individual bar.
- Input Quantity: Enter the number of bars needed.
- Choose Material: Select the steel type or enter a custom density.
- Click "Calculate Weight" to get your results.
Weight Calculation Formulas
The calculator uses the following formulas to determine weight:
- Round Bar: Weight = π × (Diameter/2)² × Length × Density
- Square Bar: Weight = Width² × Length × Density
- Flat Bar: Weight = Width × Height × Length × Density
- Rebar: Uses standard diameters for reinforcement bars with the round bar formula
Where weight is calculated in kilograms, dimensions in meters, and density in kg/m³.
Tips for Accurate Results
- Double-check all dimensions and ensure consistent units when entering values.
- For deformed rebar, the nominal diameter is used in calculations, which may give a slight overestimation as it doesn't account for deformations.
- When ordering materials, consider adding a waste allowance (typically 5-10%) to your calculated weights.
- Verify the material density if you're working with specialty steel alloys.
Common Steel Bar Applications
- Rebar: Reinforcement in concrete structures, foundations, columns, beams
- Round Bars: Shafts, axles, pins, supports
- Square Bars: Structural elements, frames, grids
- Flat Bars: Brackets, supports, braces, trim
Knowing the weight helps in structural design, transportation planning, and cost estimation for your projects.
Common Rebar Properties
| Size | Nominal Diameter | Cross-sectional Area | Weight per Meter | Weight per Foot |
|---|---|---|---|---|
| #3 (3/8″) | 9.5 mm | 71 mm² | 0.56 kg/m | 0.376 lb/ft |
| #4 (1/2″) | 12.7 mm | 129 mm² | 1.00 kg/m | 0.668 lb/ft |
| #5 (5/8″) | 15.9 mm | 199 mm² | 1.56 kg/m | 1.043 lb/ft |
| #6 (3/4″) | 19.1 mm | 284 mm² | 2.24 kg/m | 1.502 lb/ft |
| #7 (7/8″) | 22.2 mm | 387 mm² | 3.04 kg/m | 2.044 lb/ft |
| #8 (1″) | 25.4 mm | 510 mm² | 4.00 kg/m | 2.670 lb/ft |
| #9 (1-1/8″) | 28.7 mm | 645 mm² | 5.06 kg/m | 3.400 lb/ft |
| #10 (1-1/4″) | 32.3 mm | 819 mm² | 6.40 kg/m | 4.303 lb/ft |
| #11 (1-3/8″) | 34.9 mm | 956 mm² | 7.50 kg/m | 5.313 lb/ft |
| 8 mm | 8.0 mm | 50.3 mm² | 0.395 kg/m | 0.266 lb/ft |
| 10 mm | 10.0 mm | 78.5 mm² | 0.617 kg/m | 0.415 lb/ft |
| 12 mm | 12.0 mm | 113.1 mm² | 0.888 kg/m | 0.596 lb/ft |
| 16 mm | 16.0 mm | 201.1 mm² | 1.578 kg/m | 1.061 lb/ft |
| 20 mm | 20.0 mm | 314.2 mm² | 2.466 kg/m | 1.657 lb/ft |
| 25 mm | 25.0 mm | 490.9 mm² | 3.853 kg/m | 2.589 lb/ft |
| 32 mm | 32.0 mm | 804.2 mm² | 6.313 kg/m | 4.243 lb/ft |