Weld Metal Volume and Weight Calculator

Volume equals cross section area times length. The tool multiplies the two to get cubic millimetres, then divides by 1000 to show cubic centimetres. It is an exact geometric product, not a statistical estimate.

Weight equals volume in cm3 times density in g/cm3, which gives grams. Grams are then divided by 453.59237, the exact grams per avoirdupois pound, to show the pounds figure. Both conversions are exact.

Area in square millimetres (mm2), length in millimetres (mm) and density in grams per cubic centimetre (g/cm3). Results come back as cm3 for volume and both grams and pounds for weight. Mixing inches or centimetres into these fields will give wrong numbers.

Carbon and low-alloy steel is about 7.85 g/cm3, austenitic stainless about 8.0, and aluminium about 2.70. These are standard handbook values. Set the field to match your filler and base metal rather than assuming steel.

It is the deposited weld metal for the cross section you enter. It does not include electrode lost to spatter, slag, stub ends or fume, so to size a purchase you divide the deposited weight by a deposition efficiency for your process.

For a fillet weld of leg size L the triangular area is L squared divided by 2, plus any convexity. For a groove, sum the areas of the bevel opening, root and reinforcement. Enter the combined area in mm2.

Yes, if you enter the total finished cross section area of all passes. The formula does not care how many passes fill that area. If you want a single pass, enter only that pass's area.

Area, length and density must all be finite numbers greater than zero. Blank fields or a non number show a prompt, and zero or negative values are refused because a weld cannot have zero size.

Yes. The calculation runs entirely in your browser with JavaScript. Nothing you type is uploaded to a server, so your job dimensions and quantities never leave your device.