Length and thickness share this unit.
| # | Shape | Material | Density (kg/m³) |
Length L | Width W | Diameter D | Inner Dia d | Thickness T | Qty | Scrap % | Cost/kg | Weight (kg) | Cost | Actions |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Total Weight (kg) | 0 | 0 | ||||||||||||
Fields L, W, D, d, T use the selected unit. Ring uses D (outer) and d (inner).
Example Items
| Shape | Material | Density (kg/m³) | L | W | D | d | T | Qty | Scrap % | Cost/kg |
|---|---|---|---|---|---|---|---|---|---|---|
| Rectangle | Carbon Steel | 7850 | 1200 | 800 | - | - | 10 | 4 | 2 | 1.50 |
| Circle | Aluminum | 2700 | - | - | 600 | - | 8 | 6 | 0 | 3.20 |
| Ring | Stainless Steel | 8000 | - | - | 500 | 200 | 6 | 10 | 5 | 2.80 |
Formula Used
All weights compute from Volume × Density, returning kilograms. Dimensions convert to meters internally.
- Rectangle plate: \( V = L \times W \times T \)
- Circle plate: \( V = \pi \times (D/2)^2 \times T \)
- Ring plate: \( V = \pi \times \big((D/2)^2 - (d/2)^2\big) \times T \)
Then: \( \text{Weight} = V \times \rho \), multiplied by quantity and by \( 1 + \frac{\text{Scrap \%}}{100} \). Cost uses entered cost per kilogram.
Preset densities (kg/m³): Carbon Steel 7850, Stainless Steel 8000, Aluminum 2700, Brass 8500, Copper 8960, Titanium 4500. You can override density anytime.
How to Use This Calculator
- Select the working unit for all linear dimensions.
- Click Add Row and choose a shape for your plate.
- Fill relevant dimensions and thickness; unused fields may stay blank.
- Pick a material or type a custom density in kg/m³.
- Set quantity, optional scrap percentage, and optional cost per kilogram.
- Press Calculate to compute per-item and totals.
- Use Export CSV or Export PDF to download results.
- Save your session to reuse later on the same device.
FAQs
Millimeters, centimeters, meters, and inches. Length and thickness always share the same selected unit.
Yes. Choose any material as a base, then overwrite the density field with your custom value in kg/m³.
Use the Scrap % column to inflate calculated weight by your expected offcuts or wastage.
The calculator prevents invalid ring geometry and highlights the row until corrected.
Add an optional cost per kilogram; the tool multiplies it by the computed weight to estimate cost.
Yes. CSV and PDF exports include the full table with per-row weights and totals.