Choose the metal profile
Select the shape that matches your stock. A ring subtracts the centre hole, while a hex bar uses its across-flats size. Check the live preview to confirm the profile.
Metal Weight & Price Calculator
Calculate theoretical weight and material price for plates, rings, round bars and hex bars using your selected material and dimensions.
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Calculate plate and bar weight before you buy or machine.
Estimate material weight in kilograms and cost in rupees for standard plates, round plates, rings, round bars and hex bars. This free calculator combines your dimensions, quantity, selected material density and price per kg with a live 3D preview. Use it to compare stock sizes, plan material purchases and prepare a clearer requirement for your mold-making or tool-room project.
Select your material grade
Choose from Deulec’s material library. The density shown below the material selector determines the calculated weight; the saved price provides a starting rate.
Enter dimensions in mm
Enter the size directly under the 3D preview. Use raw stock dimensions for a purchase estimate or finished dimensions for a finished-part weight estimate.
Add quantity and rate
Enter the number of identical pieces and your price per kilogram. Adjust the library rate to match your quotation. Weight and price update as you change the inputs.
Metal weight and price formulas
First calculate the volume of one item from its shape. Convert that volume from cubic millimetres to cubic metres, then multiply by density. Quantity scales the weight for identical pieces; the entered rate converts weight into a material-price estimate.
Weight per item · kgVolume in mm³ × density in kg/m³ ÷ 1,000,000,000
Total weight · kgWeight per item × quantity
Price per item · INRWeight per item × rate per kg
Total material price · INRTotal weight × rate per kg
For dimensions in mm and density in kg/m³, rectangular plate weight can also be written as L × W × T × density ÷ 10⁹. Do not use surface area in this formula: weight depends on volume, so thickness or bar length must be included.
Useful conversions: 1 inch = 25.4 mm; 1 cm = 10 mm; 1 m = 1,000 mm; 1 cm³ = 1,000 mm³. A rate quoted per metric tonne can be divided by 1,000 to obtain a rate per kg.
FIVE PROFILE METHODS
Plate, ring, round-bar and hex-bar weight calculations
All dimensions below are in millimetres, giving volume V in mm³. Multiply volume by density and divide by 10⁹ to obtain kilograms.
ProfileDimensionsVolume formula and measuring advice
Standard plateLength L × width W × thickness T
V = L × W × T
Use the rectangular block dimensions. Enter thickness separately from the two larger faces.
Round plateOutside diameter D × thickness T
V = π ÷ 4 × D² × T
Measure the full diameter across the circular face, not the radius.
Ring plateOutside diameter D × inside diameter d × thickness T
V = π ÷ 4 × (D² − d²) × T
The central hole is subtracted from the solid disc. The inside diameter must be smaller than the outside diameter.
Round barDiameter D × length L
V = π ÷ 4 × D² × L
Measure diameter across the circular end and length along the bar axis.
Hex barAcross-flats size A × length L
V = √3 ÷ 2 × A² × L
Measure between two opposite flat faces. Across-corners size is larger and is not the input used here.
MATERIAL & MEASUREMENT
Why grade, density and measured size matter
Two blocks with the same dimensions have the same volume, but their weights can differ if their material densities differ. Always match the selected grade to the stock being estimated.
- Use the material-library density
- The live tool uses the stored kg/m³ value shown for the selected grade. The guide’s 7,850 kg/m³ example is not a replacement for every material’s density.
- Raw size or finished size?
- For buying stock, enter the size you will purchase. For finished-component weight, enter the final dimensions. A finished size does not include extra material for machining.
- Check the quoted rate
- The saved rate is a starting point. Update it for your supplier’s quotation and check the grade, quantity, tax basis and preparation included in that price.
- Measure a hexagon across flats
- Across flats and across corners are different measurements. For a regular hexagon, across flats = across corners × √3 ÷ 2.
- Allow for real stock geometry
- The tool models ideal solid shapes, with a central hole for rings. Additional drilled holes, chamfers, slots, pockets and rounded corners are not deducted.
- Respect the input range
- Rectangular plates support up to 8,000 mm length and width, and 500 mm thickness. Round plates and rings support up to 2,000 mm outer diameter. Bars support up to 500 mm diameter or across flats and 8,000 mm length. Quantity is 1–10,000 identical pieces.
READING YOUR ESTIMATE
What the result cards mean
- Volume / item
- The geometric volume of one piece in cm³, with the centre bore removed for a ring.
- Weight / item
- Theoretical kilograms for one piece, calculated from volume and the selected material density.
- Quantity and total weight
- The number of identical pieces and their combined weight. Changing quantity does not change the weight per item.
- Material rate
- The entered price per kilogram in INR. Leave it empty if you only need the weight estimate.
- Price / item
- The material estimate for one piece at the entered rate. Calculations retain precision before the displayed values are rounded.
- Estimated total price
- The material estimate for the complete quantity. Additional processing, taxes and delivery are not calculated separately.
BEFORE YOU PURCHASE
Confirm the stock and billing basis.
Use this result for planning and comparison. Actual supplied weight may vary with dimensional tolerance, scale, density and preparation. Confirm whether the supplier bills by measured weight, theoretical weight, piece or complete batch. Review cutting allowance, shaping, surface grinding, GST, packing and transport separately so the estimate and quotation cover the same requirement.
COMMON QUESTIONS
Metal weight and price calculator FAQs
How do I calculate steel plate weight in kg?
Multiply length × width × thickness in millimetres, multiply by the selected density in kg/m³, then divide by 1,000,000,000. For an illustrative density of 7,850 kg/m³, a 500 × 300 × 40 mm plate weighs 47.10 kg. The live calculator uses the density saved for your selected material, which may differ from this example.
How do I calculate metal price from weight?
Multiply weight in kilograms by the quoted price per kilogram. Multiply by quantity for identical pieces. For example, 47.10 kg × ₹80/kg is ₹3,768.00 per plate. The rate in this example is illustrative; confirm the applicable rate and what it includes with your supplier.
Can I calculate weight without entering a price?
Yes. Leave Rate / kg empty to see volume, weight per item and total weight. Price appears once you enter a valid rate. Entering zero is different from leaving the field empty: zero produces a zero-price estimate.
Is hex bar size measured across flats or across corners?
Use the distance between two opposite parallel flat faces. For a regular hexagon, across-flats size equals across-corners size × √3 ÷ 2. Entering an across-corners measurement directly would overestimate the section area and weight.
Can this tool calculate aluminium, stainless steel or other metals?
The calculation works with the density of the selected material, but the dropdown only offers grades in Deulec’s current material library. Use a grade only when it matches your stock. Do not select a steel grade to estimate a different metal with a different density.
Are the dimensions in millimetres or inches?
Enter all dimensions in millimetres. Multiply inches by 25.4, centimetres by 10, or metres by 1,000 before entering a dimension. Volume is shown in cm³, weight in kg and price in Indian rupees.
Does the estimate include GST, cutting, grinding or delivery?
The tool multiplies theoretical weight by the rate you enter. It does not add separate GST, cutting, shaping, grinding, packing or delivery charges. If your rate already includes a charge, that charge is reflected in the multiplication; otherwise account for it separately.
Why is the actual weighed material different from the calculator?
The estimate assumes exact dimensions and an ideal solid profile. Mill tolerances, rounded edges, scale, holes, machining allowances and the actual material density can change the supplied weight. Use measured stock dimensions for a closer estimate and agree the billing weight basis before purchase.
Can I estimate several different sizes together?
Quantity applies to identical pieces of the selected size. Calculate each different size separately and add the results, or use Plates & Bars to prepare a list of different plate and round-bar requirements for a quotation.
How can I estimate machining scrap and shaping charges?
Use the Metal shaping calculator to enter both raw and finished dimensions. It estimates raw weight, finished weight, theoretical scrap, affected machining surface area and shaping cost at your entered rate per square inch.