Calculator Inputs
Single-page engineering workflowExample Data Table
This sample shows how the calculator handles typical structural components. Values are approximate and use standard gravity.
| Component | Shape | Dimensions | Density | Qty | Total Volume (m³) | Mass (kg) | Weight (kN) |
|---|---|---|---|---|---|---|---|
| Floor Slab | Rectangular Slab | 8 × 5 × 0.15 m | 2400 kg/m³ | 1 | 6.0000 | 14400.00 | 141.22 |
| Primary Beam | Rectangular Beam | 6 × 0.30 × 0.50 m | 2400 kg/m³ | 2 | 1.8000 | 4320.00 | 42.36 |
| Masonry Wall | Wall Panel | 4 × 3 × 0.20 m | 1800 kg/m³ | 1 | 2.4000 | 4320.00 | 42.36 |
Formula Used
Deadweight is the permanent self-weight of a component. This calculator converts entered dimensions to meters, computes volume from the selected geometry, multiplies by density to find mass, then applies gravity to determine weight.
Core Equations
- Rectangular volume: V = L × W × T
- Beam / column volume: V = L × W × D
- Wall panel volume: V = L × H × T
- Solid cylinder volume: V = π × D² / 4 × L
- Hollow cylinder volume: V = π × (OD² − ID²) / 4 × L
- Sphere volume: V = π × D³ / 6
Load Conversion
- Mass: m = V × ρ × quantity
- Weight: W = m × g
- Weight in kN: WkN = (m × g) / 1000
- Factored deadweight: Wf = W × safety factor
- Equivalent uniform load: q = Wf / A
Where V is volume, ρ is density, g is gravity, and A is the reference area.
How to Use This Calculator
- Enter project-wide settings such as gravity, safety factor, reference area, and preferred output force unit.
- Add one or more components. Choose the correct geometric shape for each item.
- Select a material preset or choose custom density and enter your own density value.
- Pick the dimension unit, then enter the required dimensions and quantity.
- Submit the form to see totals, factored deadweight, component shares, and the Plotly chart.
- Use the CSV or PDF buttons to export the calculated results.
FAQs
1) What does deadweight mean in this calculator?
Deadweight here means the permanent self-weight of structural or mechanical components. It excludes live loads, temporary loads, fluid surges, wind, seismic effects, and moving equipment unless you intentionally model them as permanent items.
2) Can I calculate total deadweight for multiple components together?
Yes. Add several rows for slabs, beams, walls, cylinders, or spheres. The calculator totals all component masses and weights, then applies the selected safety factor to the combined deadweight.
3) Which density unit should I choose?
Choose kg/m³ for metric data or lb/ft³ for imperial material data. The calculator converts both to a consistent internal basis before computing mass and deadweight.
4) Why is gravity included as an input?
Gravity affects the conversion from mass to force. Standard gravity is prefilled, but the field stays editable for specialized engineering studies, nonstandard assumptions, or internal company calculation sheets.
5) What is the purpose of the reference area field?
The reference area converts total factored deadweight into an equivalent uniform load. That is useful when comparing floor loads, platform loads, or roof dead load intensity.
6) Does the calculator include load factors automatically?
It applies the safety factor you enter. Set the factor to 1.00 for unfactored deadweight, or use your required design factor when producing a factored permanent load estimate.
7) Can I use this for tanks, pipes, and solid shafts?
Yes. Use solid cylinder for shafts, hollow cylinder for pipes, and rectangular or cylindrical shapes for simple tank shells or heavy permanent items when dimensions and material density are known.
8) Are the exported CSV and PDF files suitable for reports?
They are suitable for quick documentation, checking, and sharing results. For formal design submissions, always review inputs, assumptions, factors, and project code requirements before final use.