Metal & Material Weight Calculator
Quickly estimate metal and material weight for steel, aluminum, stainless steel, brass, copper, titanium and engineering plastics. Calculate round bar, plate, square bar, tube and hex stock by entering your dimensions below.
Enter Your Stock Dimensions
Density values are typical reference values. Exact weight can vary by alloy, grade, manufacturing condition and supplier.
Common Material Density Values
Approximate densities used by the calculator. Values are intended for estimating raw-stock weight and should not replace certified supplier data.
How the Metal Weight Calculator Works
The calculator first determines the volume of the stock from its dimensions and shape. That volume is multiplied by the typical density of the selected material to estimate weight.
Use it as a metal weight calculator for aluminum, steel, stainless steel, brass, copper and titanium, or to estimate the weight of common engineering plastics. It supports round bar, square bar, rectangular stock, plate, round tube and hex bar.
Round Bar Weight
Enter the bar diameter and length. The calculator determines cylindrical volume and multiplies it by the selected material density.
Plate & Rectangle Weight
Enter width, thickness and length to estimate the weight of plate, flat bar or rectangular stock.
Tube Weight
Enter outside diameter, inside diameter and length. The hollow center is removed from the volume before weight is calculated.
Hex Bar Weight
Enter the dimension across the flats and the bar length to estimate the weight of hexagonal stock.
Metal Weight Calculators by Material
Use this calculator as a steel weight calculator, aluminum weight calculator, stainless steel weight calculator, brass weight calculator, copper weight calculator or titanium weight calculator. Select the material above and the calculator automatically applies the appropriate typical density value.
It can also be used as a round bar weight calculator, plate weight calculator, square bar weight calculator, tube weight calculator or hex bar weight calculator. Results include weight per piece, total weight, pounds per foot, kilograms and calculated stock volume.
Material guides: Aluminum · Steel · Stainless Steel · Brass · Copper · Acetal · Nylon
Steel Weight Calculator
Use the calculator above to estimate the weight of mild steel and common alloy steel stock. Select the steel material, choose the stock shape, and enter the dimensions to calculate approximate piece weight, total weight and pounds per foot.
Aluminum Weight Calculator
Estimate aluminum stock weight for common machining materials such as 6061 and 7075 aluminum. The calculator supports round bar, square bar, plate, rectangular stock, tube and hex bar in inches or millimeters.
Stainless Steel Weight Calculator
Calculate approximate stainless steel stock weight using typical density values for common grades including 304 and 316 stainless steel. Results are displayed in pounds and kilograms.
Plate Weight Calculator
For plate or flat rectangular stock, select Rectangle / Plate and enter the width, thickness and length. This can be used to estimate aluminum plate weight, steel plate weight, stainless steel plate weight and other supported materials.
Round Bar Weight Calculator
Select Round Bar and enter the bar diameter and length to calculate approximate round stock weight. The result also includes estimated weight per foot, which can be useful when comparing stock sizes.
Tube Weight Calculator
Select Round Tube and enter the outside diameter, inside diameter and length. The calculator subtracts the hollow center before applying the selected material density.
Metal Weight Per Foot
The results panel includes estimated pounds per foot based on the selected material and cross-sectional shape. This is useful for comparing bar, tube, plate and other stock before ordering material.
Material Weight Formulas
Material weight is calculated by multiplying stock volume by material density. The calculator uses the appropriate geometry formula for the selected stock shape.
Round Bar
Volume = π × (diameter ÷ 2)² × length
Rectangle / Plate
Volume = width × thickness × length
Round Tube
Volume = π × ((OD ÷ 2)² − (ID ÷ 2)²) × length
Square Bar
Volume = side × side × length
Why Material Weight Matters
Raw-stock weight can affect purchasing, freight, handling and overall project planning. For machining work, the starting stock can weigh considerably more than the finished component because material is removed during turning, milling, drilling and other operations.
Material Weight Calculator FAQ
How do you calculate material weight?
Calculate the volume of the stock and multiply that volume by the material density. Different stock shapes require different volume formulas.
Can I calculate metal weight in kilograms?
Yes. Results are shown in both pounds and kilograms.
Can I enter millimeter dimensions?
Yes. Select Millimeters at the top of the calculator and enter all dimensions in millimeters.
Is the calculator exact?
No. It uses typical density values. Exact density and finished weight can vary by alloy, grade, stock condition and supplier.
Does this calculate finished CNC part weight?
It calculates the weight of the stock geometry entered. A finished machined component will usually weigh less after material is removed.
Turn the Material Into a Finished Part
Send Anco Precision your drawing, material and quantity for an actual CNC machining quote.