This online calculation is for bead overlay welding on sheet metal. For welding inside a groove, the thickness of the plate to be inserted for the calculation must be smaller than the actual thickness of the plate (t8/5 is expected to be higher than for the bead in the sheet). For fillet welding, the thickness to be inserted must be greater than the actual thickness (t8/5 is expected to be lower than for the bead in the sheet). However, the thickness to be inserted is unknown for both cases.
Credits: https://www-it.jwes.or.jp
