welding calculator
Fillet Weld Metal Weight Calculator
Estimate the deposited metal weight of an equal-leg fillet weld from the leg size and weld length.
How it works
Equal-leg fillet cross-section = 0.5 x leg^2. Deposited weight = area x length x factor x 0.284 lb/in^3 (steel).
Worked example
A 1/4 in leg over 12 in: area = 0.5 x 0.25^2 = 0.03125 in^2, volume 0.375 in^3, weight 0.107 lb.
When to use it
- Reinforcement factor is about 1.0 for a flat fillet; raise it for a convex face.
- Steel density is 0.284 lb/in^3; scale for other metals.
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All results are an engineering estimate — not for custody transfer. Field measurement and certified tables govern.