Stock form
Plate, flat bar, round bar or near-net stock can change both buying cost and machining time.
ENGINEERING TOOL · MATERIAL PLANNING
Material weight and cost calculator
Calculate rectangular blocks, solid round bars or hollow tubes. Choose a material, enter the stock dimensions and a USD/kg or USD/lb rate, then compare material-only cost for one blank or a batch.One honest numberRaw stock cost stays separate from the manufacturing quote.
MATERIAL WEIGHT & COST CALCULATOR
Estimate raw material cost—and see what could change your CNC quote.
Calculate theoretical blank weight, batch material cost and price sensitivity before requesting a production quote.MATERIAL-ONLY ESTIMATEAluminum 6061-T6
Theoretical raw material cost$1.56 per blank
$1.56 for 1 blank
Based on a 100 × 60 × 20 mm Aluminum 6061-T6 rectangular blank at $4.80/kg.
Volume / blank120.00 cm³
Weight / blank0.324 kg
Total material weight0.324 kg
Entered rate$4.80/kg
PRICE SENSITIVITY · IF RATE INCREASES BY $1/kg+$0.32 / blank · +$0.32 / batch
CalculationLength × width × height × density × price/kg
Included
Theoretical geometric blank volume × density × your entered rate.
Not included
Extra stock or cutting allowance, stock-size waste, setup, machining time, tooling, tolerances, finishing, inspection, certification, packaging, freight or duties.
WHAT CAN CHANGE THE FINISHED-PART PRICE
- Stock form, allowance & waste
- Setup, cycle time & quantity
- Tooling & workholding
- Tolerances & inspection
- Finish & certification
- Packaging, freight & duties
MAKE THIS ESTIMATE PRODUCTION-READY
Turn the material estimate into a reviewed manufacturing request.
Upload the drawing and quantity. OUJI will review the material, blank, manufacturability, finish, inspection scope and lead time before quoting.
Turn this estimate into a production quote No drawing yet? Ask an engineer about material and stock options.No account required · calculator values remain editable in the RFQ
Check the highlighted input.Enter positive dimensions to calculate the material.
FROM STOCK TO FINISHED PART
The material math is simple. Choosing the right blank is where experience saves money.
Machining allowance
Facing, clamping and cleanup need enough material beyond the final model envelope.
Yield and cut plan
Part orientation, saw kerf and standard stock lengths determine how many blanks come from a bar or plate.
Grade and condition
Temper, hardness, certification and traceability can matter as much as the alloy name.
VISIBLE CALCULATION
A transparent estimate you can replace with your own buying rate.
Block: L × W × H
Round: π × D² ÷ 4 × L
Tube: π × (OD² − ID²) ÷ 4 × L
Density is selected from the material table and reported as kilograms per blank and per batch.
Choose USD/kg or USD/lb. Quantity multiplies blank weight and material cost without adding manufacturing costs.
| Material | Family | Density | Starter rate |
|---|---|---|---|
| Aluminum 6061-T6 | Aluminum | 2,700 kg/m³ | $4.80 / kg editable |
| Aluminum 7075-T6 | Aluminum | 2,810 kg/m³ | $9.50 / kg editable |
| Mild Steel 1018 | Steel | 7,870 kg/m³ | $1.50 / kg editable |
| Alloy Steel 4140 | Steel | 7,850 kg/m³ | $2.10 / kg editable |
| Stainless Steel 304 | Steel | 8,000 kg/m³ | $3.80 / kg editable |
| Stainless Steel 316 | Steel | 8,000 kg/m³ | $5.30 / kg editable |
| Brass C360 | Copper alloy | 8,500 kg/m³ | $7.50 / kg editable |
| Copper C110 | Copper alloy | 8,960 kg/m³ | $10.50 / kg editable |
| Titanium Grade 5 | Titanium | 4,430 kg/m³ | $34.00 / kg editable |
| POM / Acetal (Delrin) | Engineering plastic | 1,410 kg/m³ | $4.00 / kg editable |
| Nylon 6 | Engineering plastic | 1,150 kg/m³ | $3.80 / kg editable |
Price note: starter rates are illustrative calculator inputs—not a supplier offer, live commodity feed or OUJI quotation. Enter your current rate for purchasing decisions.
MATERIAL COST FAQ
Questions behind a credible raw-stock estimate.
How do you calculate material weight from length, width and height?
For rectangular stock, multiply length × width × height to get volume, convert that volume to cubic metres, then multiply by the material density in kilograms per cubic metre. The calculator handles the conversion from millimetres or inches automatically.
How is raw material cost calculated?
Raw material cost equals calculated weight × the entered price rate × quantity. You can enter USD per kilogram or per pound; switching the rate basis preserves the same effective price. The displayed price is a material-only estimate and does not include manufacturing or delivery costs.
How do you calculate the weight of a solid round bar?
Round-bar volume is π × diameter² ÷ 4 × length. After unit conversion, multiply the volume by material density to get weight, then multiply by the entered price per kilogram and quantity for cost.
How do you calculate hollow tube weight and wall thickness?
Tube material volume is π × (outside diameter² − inside diameter²) ÷ 4 × length. Wall thickness is (outside diameter − inside diameter) ÷ 2. The inside diameter must be smaller than the outside diameter.
Are the material prices live market prices?
No. The prefilled prices are editable starter values so the calculator works immediately. Replace the example rate with your supplier rate, contract rate or current purchasing assumption before using the result for planning.
Should I enter finished-part dimensions or raw blank dimensions?
Enter the dimensions of the raw rectangular blank you expect to buy. A machinable blank is normally larger than the finished part because it may need saw allowance, facing stock, workholding material or standard bar and plate sizes.
Why can a manufacturing quote be much higher than this material estimate?
Material is only one part of a custom-part quote. Programming, setup, cycle time, tooling, yield risk, secondary processes, inspection, packaging and freight may outweigh the raw stock cost—especially for complex or tight-tolerance parts.
READY TO PRICE THE PART, NOT JUST THE BLOCK?