Calculator
Formula Used
The calculator first finds cross section area. Then it multiplies that area by density. That gives weight per meter.
Weight per meter = Cross section area × Density
Usable weight = Total weight × (1 − Waste percent ÷ 100)
Linear meters = Usable weight ÷ Weight per meter
Linear feet = Linear meters × 3.280839895
| Shape | Area Formula | Required Inputs |
|---|---|---|
| Round Bar | π × d² ÷ 4 | Diameter |
| Square Bar | Side² | Side size |
| Rectangular Bar | Width × Height | Width and height |
| Pipe or Tube | π × (OD² − ID²) ÷ 4 | Outer diameter and wall thickness |
| Equal Angle | 2 × Leg × Thickness − Thickness² | Leg and thickness |
How to Use This Calculator
- Enter the total steel weight.
- Select the correct weight unit.
- Choose the steel shape.
- Select the dimension unit.
- Fill only the dimensions needed for that shape.
- Choose a density preset or enter a custom density.
- Add waste allowance when cutting loss matters.
- Enter piece count for length per piece.
- Press the calculate button.
- Download the result as CSV or PDF when needed.
Example Data Table
| Total Weight | Shape | Dimension | Density | Estimated Length |
|---|---|---|---|---|
| 1000 kg | Round Bar | 25 mm diameter | 7850 kg/m³ | About 835.4 ft |
| 500 kg | Square Bar | 20 mm side | 7850 kg/m³ | About 522.6 ft |
| 1200 lb | Pipe | 60 mm OD, 5 mm wall | 7850 kg/m³ | About 678.8 ft |
| 2 metric tons | Flat Bar | 75 mm × 10 mm | 7850 kg/m³ | About 1114.7 ft |
Steel Length Planning Guide
Why Linear Feet Matter
Steel projects often start with weight. Stock lists, invoices, bundles, and mill certificates may show weight instead of length. A steel weight to linear feet calculator helps convert that weight into usable footage. This supports ordering, cutting, estimating, and site planning.
Shape Controls the Result
Shape is the most important input after weight. A round bar, square bar, pipe, flat bar, and angle do not share the same cross section. Each profile needs its own area formula. When the area changes, weight per foot also changes. That changes the final length.
Density Improves Accuracy
Most carbon steel uses a density near 7850 kg per cubic meter. Stainless steel can be slightly heavier. Tool steel can vary by grade. The calculator includes density presets. It also allows custom density for special grades, supplier data, or engineering sheets.
Waste and Cutting Loss
Real projects rarely use every inch. Saw cuts, trimming, end cleanup, damaged edges, and layout changes reduce usable length. The waste field removes that percentage before length is calculated. This gives a safer estimate for fabrication and purchasing.
Useful Shop Outputs
The result shows total feet, total meters, weight per foot, weight per meter, and length per piece. These values help compare quotes and plan bundles. A cost field is also included. It can estimate total cost and cost per foot from the entered weight price.
Better Estimating Habits
Always confirm dimensions before ordering. Nominal pipe sizes may not equal actual outside diameter. Mill tolerances can change final weight. Coatings can also add small weight. For critical work, compare the result with supplier tables and project specifications.
FAQs
1. What does this calculator do?
It converts steel weight into linear feet. It uses shape dimensions, steel density, and waste allowance. It also shows meters, weight per foot, length per piece, and optional cost values.
2. Which steel density should I use?
Use 7850 kg/m³ for common carbon steel. Use 8000 kg/m³ for many stainless steels. Use a custom value when your supplier, drawing, or material certificate gives a more exact density.
3. Why does shape affect linear feet?
Each shape has a different cross section area. A larger area makes each foot heavier. That means the same total weight gives fewer linear feet. A smaller area gives more length from the same weight.
4. Can I calculate pipe length from weight?
Yes. Select pipe or tube. Enter outer diameter and wall thickness. The calculator finds the hollow area by subtracting the inside area from the outside area.
5. What is waste allowance?
Waste allowance reduces usable weight before calculating length. It covers saw kerf, trimming, damaged ends, and cutting mistakes. Use a higher value when cuts are many or tolerances are strict.
6. Are the results exact?
The results are strong estimates. Accuracy depends on correct dimensions, density, and profile type. Real steel may vary because of mill tolerance, coatings, rust, scale, and manufacturing differences.
7. Can I download the calculation?
Yes. After calculation, download buttons appear. Use CSV for spreadsheets. Use PDF for a simple printable record. Both exports include the main input and result values.
8. How do I calculate length per piece?
Enter the number of pieces in the piece count field. The calculator divides total linear feet and meters by that number. This helps plan equal cuts, bundles, and stock distribution.