Calculator Form
Example Data Table
| Shape | Material | Key Dimensions | Length | Density | Approx. Mass/Piece |
|---|---|---|---|---|---|
| Plate / Flat Bar | Carbon Steel | 300 mm × 12 mm | 2.0 m | 7850 kg/m³ | 56.52 kg |
| Round Bar | Aluminum | 25 mm diameter | 1.5 m | 2700 kg/m³ | 1.99 kg |
| Pipe / Tube | Stainless Steel | 60 mm OD × 3 mm wall | 3.0 m | 8000 kg/m³ | 12.89 kg |
| Rectangular Tube | Carbon Steel | 100 mm × 50 mm × 4 mm wall | 4.0 m | 7850 kg/m³ | 35.67 kg |
Formula Used
The calculator first finds the cross-sectional area, then multiplies it by length to obtain volume. Mass equals density multiplied by volume. Weight force equals mass multiplied by gravity.
| Section | Area Formula |
|---|---|
| Plate / Flat Bar | A = width × thickness |
| Rectangular Bar | A = width × height |
| Square Bar | A = side² |
| Round Bar | A = πd² / 4 |
| Pipe / Hollow Tube | A = π(OD² − ID²) / 4 |
| Rectangular Tube | A = (B × H) − ((B − 2t) × (H − 2t)) |
| Angle Section | A = (t × a) + (t × b) − t² |
| I-Beam | A = 2(bf × tf) + ((h − 2tf) × tw) |
Volume: V = A × L
Mass: m = ρ × V
Weight force: W = m × g
Total mass with wastage: Total = (Mass per piece × Quantity) × (1 + Wastage/100)
How to Use This Calculator
- Select the structural shape that matches your member.
- Choose a material preset or use a custom density.
- Enter member length and pick the correct length unit.
- Enter the required section dimensions using one dimension unit.
- Set quantity, wastage allowance, and optional cost rate.
- Press the calculate button to display the result above the form.
- Review area, volume, mass, force, total mass, and chart output.
- Use the CSV or PDF buttons to export the current result.
Frequently Asked Questions
1) Does this calculator return mass or force?
It returns both. Mass is shown in kilograms and pounds. Weight force is shown in newtons and kilonewtons using the gravity value entered.
2) Why does density matter so much?
Density directly converts volume into mass. Two members with identical dimensions can have very different weights if their materials have different densities.
3) Can I use custom material density?
Yes. Choose the custom density option and enter your own value in kg/m³, g/cm³, or lb/ft³. The calculator converts it automatically.
4) What is the purpose of wastage allowance?
Wastage allowance adds extra mass for cutting loss, trim, scrap, or ordering margin. It helps estimate realistic procurement totals.
5) Can I calculate multiple pieces together?
Yes. Enter the quantity field to multiply the single-piece result. The calculator also applies wastage to the batch total.
6) Is the I-beam result exact for all rolled sections?
It is a geometric approximation from the dimensions entered. Standard rolled sections may vary slightly due to fillets, taper, and manufacturer tolerances.
7) Why include gravity as an input?
Gravity allows you to convert mass into force for local or project-specific requirements. Standard Earth gravity is prefilled for convenience.
8) Can I export the results?
Yes. Use the CSV button for spreadsheet-friendly data or the PDF button to save the current result section and chart as a document.