Fillet Weld Sizing Calculator

Determine required fillet weld size for a given load.

Affects minimum weld size per AWS D1.1 Table 5.8

AWS D1.1 Min Fillet Weld Size

Base Metal (mm)Min Fillet
to 6mm (1/4")3mm (1/8")
6-13mm (1/4-1/2")5mm (3/16")
13-19mm (1/2-3/4")6mm (1/4")
>19mm (>3/4")8mm (5/16")